./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/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 d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:35,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:35,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:35,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:35,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:35,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:35,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:35,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:35,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:35,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:35,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:35,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:35,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:35,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:35,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:35,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:35,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:35,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:35,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:35,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:35,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:35,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:35,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:35,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:35,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:35,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:35,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:35,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:35,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:35,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:35,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:35,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:35,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:35,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:35,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:35,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:35,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:35,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:35,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:35,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:35,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:35,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:35:35,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:35,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:35,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:35,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:35,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:35,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:35,700 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:35,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:35,701 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:35,701 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:35,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:35,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:35,711 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:35,712 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:35,712 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:35,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:35,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:35,717 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:35,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:35,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:35,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:35,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:35:35,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:35,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:35:35,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:35:35,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:35,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:35:35,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:35,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:35,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:35,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:35,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:35,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:35,722 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 [2021-11-20 23:35:36,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:36,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:36,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:36,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:36,038 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:36,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-20 23:35:36,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/data/e26401f2a/26a20d5b0cdd4c8fa0f72d8276f9bbe0/FLAGc774bc2f2 [2021-11-20 23:35:37,147 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:37,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-20 23:35:37,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/data/e26401f2a/26a20d5b0cdd4c8fa0f72d8276f9bbe0/FLAGc774bc2f2 [2021-11-20 23:35:37,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/data/e26401f2a/26a20d5b0cdd4c8fa0f72d8276f9bbe0 [2021-11-20 23:35:37,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:37,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:37,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:37,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:37,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:37,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:37" (1/1) ... [2021-11-20 23:35:37,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596c0dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:37, skipping insertion in model container [2021-11-20 23:35:37,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:37" (1/1) ... [2021-11-20 23:35:37,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:37,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:42,005 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2021-11-20 23:35:42,014 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2021-11-20 23:35:42,015 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2021-11-20 23:35:42,017 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2021-11-20 23:35:42,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:42,141 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:42,677 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2021-11-20 23:35:42,678 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2021-11-20 23:35:42,678 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2021-11-20 23:35:42,679 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_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2021-11-20 23:35:42,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:43,152 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:43,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43 WrapperNode [2021-11-20 23:35:43,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:43,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:43,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:43,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:43,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:43,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:43,680 INFO L137 Inliner]: procedures = 547, calls = 4326, calls flagged for inlining = 248, calls inlined = 226, statements flattened = 8589 [2021-11-20 23:35:43,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:43,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:43,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:43,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:43,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:43,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:43,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:43,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:44,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:44,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:44,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:44,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:44,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:44,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:44,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:44,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (1/1) ... [2021-11-20 23:35:44,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:44,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:44,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:44,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-20 23:35:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-20 23:35:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:35:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:35:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-20 23:35:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-20 23:35:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-20 23:35:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-20 23:35:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_nway_reset [2021-11-20 23:35:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_nway_reset [2021-11-20 23:35:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:35:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:35:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_87 [2021-11-20 23:35:44,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_87 [2021-11-20 23:35:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:35:44,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:35:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 23:35:44,457 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 23:35:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure set_8021q_mode [2021-11-20 23:35:44,457 INFO L138 BoogieDeclarations]: Found implementation of procedure set_8021q_mode [2021-11-20 23:35:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_82 [2021-11-20 23:35:44,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_82 [2021-11-20 23:35:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_remove_one [2021-11-20 23:35:44,458 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_remove_one [2021-11-20 23:35:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:35:44,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:35:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-20 23:35:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-20 23:35:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure issue_and_wait [2021-11-20 23:35:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_and_wait [2021-11-20 23:35:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 23:35:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 23:35:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-20 23:35:44,459 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-20 23:35:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2021-11-20 23:35:44,460 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2021-11-20 23:35:44,460 INFO L130 BoogieDeclarations]: Found specification of procedure window_write32 [2021-11-20 23:35:44,460 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write32 [2021-11-20 23:35:44,460 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-20 23:35:44,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-20 23:35:44,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_65 [2021-11-20 23:35:44,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_65 [2021-11-20 23:35:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-20 23:35:44,461 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-20 23:35:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_5 [2021-11-20 23:35:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_5 [2021-11-20 23:35:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:35:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:35:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_window_lock_of_vortex_private [2021-11-20 23:35:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_window_lock_of_vortex_private [2021-11-20 23:35:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_vortex_private [2021-11-20 23:35:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_vortex_private [2021-11-20 23:35:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure window_set [2021-11-20 23:35:44,463 INFO L138 BoogieDeclarations]: Found implementation of procedure window_set [2021-11-20 23:35:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-20 23:35:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-20 23:35:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:35:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:35:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 23:35:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 23:35:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-20 23:35:44,479 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-20 23:35:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:35:44,479 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:35:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-20 23:35:44,479 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-20 23:35:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:35:44,479 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:35:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:35:44,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:35:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2021-11-20 23:35:44,481 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2021-11-20 23:35:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 23:35:44,481 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 23:35:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_5_2 [2021-11-20 23:35:44,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_5_2 [2021-11-20 23:35:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-20 23:35:44,482 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-20 23:35:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:35:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tx_timestamp [2021-11-20 23:35:44,482 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tx_timestamp [2021-11-20 23:35:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-20 23:35:44,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-20 23:35:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:35:44,484 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:35:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 23:35:44,484 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 23:35:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:35:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_tx_timeout [2021-11-20 23:35:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_tx_timeout [2021-11-20 23:35:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2021-11-20 23:35:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2021-11-20 23:35:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ioport_map [2021-11-20 23:35:44,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ioport_map [2021-11-20 23:35:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 23:35:44,486 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 23:35:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-20 23:35:44,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-20 23:35:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:35:44,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:35:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:35:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:35:44,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:35:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_interrupt [2021-11-20 23:35:44,488 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_interrupt [2021-11-20 23:35:44,491 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-20 23:35:44,491 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-20 23:35:44,491 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 23:35:44,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 23:35:44,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:35:44,493 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:35:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-20 23:35:44,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-20 23:35:44,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:35:44,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:35:44,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-20 23:35:44,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-20 23:35:44,499 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_set_duplex [2021-11-20 23:35:44,499 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_set_duplex [2021-11-20 23:35:44,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_83 [2021-11-20 23:35:44,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_83 [2021-11-20 23:35:44,499 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-20 23:35:44,499 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-20 23:35:44,499 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-20 23:35:44,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-20 23:35:44,499 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-20 23:35:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-20 23:35:44,500 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_error [2021-11-20 23:35:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_error [2021-11-20 23:35:44,500 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-20 23:35:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-20 23:35:44,500 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_close [2021-11-20 23:35:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_close [2021-11-20 23:35:44,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:35:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2021-11-20 23:35:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-20 23:35:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:35:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:35:44,501 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 23:35:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 23:35:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:35:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2021-11-20 23:35:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2021-11-20 23:35:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:35:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:35:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-20 23:35:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-20 23:35:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:35:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:35:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_98 [2021-11-20 23:35:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_98 [2021-11-20 23:35:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_set_WOL [2021-11-20 23:35:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_set_WOL [2021-11-20 23:35:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-20 23:35:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-20 23:35:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure window_write16 [2021-11-20 23:35:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write16 [2021-11-20 23:35:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-20 23:35:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-20 23:35:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-20 23:35:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-20 23:35:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure window_read8 [2021-11-20 23:35:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read8 [2021-11-20 23:35:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-20 23:35:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-20 23:35:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2021-11-20 23:35:44,504 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2021-11-20 23:35:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:35:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:35:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-20 23:35:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-20 23:35:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure poll_vortex [2021-11-20 23:35:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_vortex [2021-11-20 23:35:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:35:44,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:35:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_window_lock_of_vortex_private [2021-11-20 23:35:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_window_lock_of_vortex_private [2021-11-20 23:35:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_check_media [2021-11-20 23:35:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_check_media [2021-11-20 23:35:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-20 23:35:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-20 23:35:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-20 23:35:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-20 23:35:44,506 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_rx [2021-11-20 23:35:44,506 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_rx [2021-11-20 23:35:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_save_flags [2021-11-20 23:35:44,507 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_save_flags [2021-11-20 23:35:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_open [2021-11-20 23:35:44,507 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_open [2021-11-20 23:35:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure dump_tx_ring [2021-11-20 23:35:44,507 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_tx_ring [2021-11-20 23:35:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-20 23:35:44,507 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-20 23:35:44,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:44,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_probe1 [2021-11-20 23:35:44,508 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_probe1 [2021-11-20 23:35:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:35:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:35:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:35:44,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:35:44,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:35:44,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:35:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-20 23:35:44,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-20 23:35:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2021-11-20 23:35:44,509 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2021-11-20 23:35:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-20 23:35:44,510 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:35:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-20 23:35:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 23:35:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-20 23:35:44,511 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:35:44,511 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-20 23:35:44,512 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-20 23:35:44,512 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 23:35:44,512 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 23:35:44,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:35:44,512 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_suspend [2021-11-20 23:35:44,512 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_suspend [2021-11-20 23:35:44,512 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_interrupt [2021-11-20 23:35:44,513 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_interrupt [2021-11-20 23:35:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_81 [2021-11-20 23:35:44,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_81 [2021-11-20 23:35:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:35:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:35:44,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:35:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure rx_oom_timer [2021-11-20 23:35:44,517 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_oom_timer [2021-11-20 23:35:44,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-20 23:35:44,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-20 23:35:44,518 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:35:44,519 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:35:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:35:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:35:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-20 23:35:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-20 23:35:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_108 [2021-11-20 23:35:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_108 [2021-11-20 23:35:44,520 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-20 23:35:44,520 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-20 23:35:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-20 23:35:44,521 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-20 23:35:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_89 [2021-11-20 23:35:44,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_89 [2021-11-20 23:35:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_88 [2021-11-20 23:35:44,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_88 [2021-11-20 23:35:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_resume [2021-11-20 23:35:44,521 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_resume [2021-11-20 23:35:44,521 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2021-11-20 23:35:44,521 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2021-11-20 23:35:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-20 23:35:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-20 23:35:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_rx [2021-11-20 23:35:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_rx [2021-11-20 23:35:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:35:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:35:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:35:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:35:44,522 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-20 23:35:44,522 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:35:44,523 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_delay [2021-11-20 23:35:44,523 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_delay [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_timer [2021-11-20 23:35:44,523 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_timer [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_down [2021-11-20 23:35:44,523 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_down [2021-11-20 23:35:44,523 INFO L130 BoogieDeclarations]: Found specification of procedure eth_type_trans [2021-11-20 23:35:44,524 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_type_trans [2021-11-20 23:35:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-20 23:35:44,524 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-20 23:35:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:35:44,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:35:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure window_write8 [2021-11-20 23:35:44,524 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write8 [2021-11-20 23:35:44,524 INFO L130 BoogieDeclarations]: Found specification of procedure window_read32 [2021-11-20 23:35:44,524 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read32 [2021-11-20 23:35:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_10_2 [2021-11-20 23:35:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_10_2 [2021-11-20 23:35:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-20 23:35:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-20 23:35:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_109 [2021-11-20 23:35:44,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_109 [2021-11-20 23:35:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_94 [2021-11-20 23:35:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_94 [2021-11-20 23:35:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32_rep [2021-11-20 23:35:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32_rep [2021-11-20 23:35:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_90 [2021-11-20 23:35:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_90 [2021-11-20 23:35:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-20 23:35:44,526 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-20 23:35:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_up [2021-11-20 23:35:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_up [2021-11-20 23:35:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure window_read16 [2021-11-20 23:35:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read16 [2021-11-20 23:35:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:35:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:35:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-20 23:35:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-20 23:35:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-20 23:35:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-20 23:35:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_vortex_private [2021-11-20 23:35:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_vortex_private [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 23:35:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:35:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:35:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-20 23:35:44,529 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-20 23:35:45,782 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:45,787 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:47,586 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:35:53,322 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:55,821 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:55,821 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:35:55,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:55 BoogieIcfgContainer [2021-11-20 23:35:55,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:55,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:55,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:55,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:55,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:37" (1/3) ... [2021-11-20 23:35:55,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42878a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:55, skipping insertion in model container [2021-11-20 23:35:55,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:43" (2/3) ... [2021-11-20 23:35:55,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42878a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:55, skipping insertion in model container [2021-11-20 23:35:55,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:55" (3/3) ... [2021-11-20 23:35:55,839 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2021-11-20 23:35:55,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:55,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 23:35:55,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:55,935 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:35:55,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:35:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 2097 states, 1181 states have (on average 1.3022861981371718) internal successors, (1538), 1269 states have internal predecessors, (1538), 758 states have call successors, (758), 155 states have call predecessors, (758), 154 states have return successors, (751), 733 states have call predecessors, (751), 751 states have call successors, (751) [2021-11-20 23:35:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 23:35:56,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:56,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:56,039 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 23:35:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash -12733041, now seen corresponding path program 1 times [2021-11-20 23:35:56,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:56,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088601954] [2021-11-20 23:35:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:56,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:56,982 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 23:35:56,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088601954] [2021-11-20 23:35:56,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088601954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:56,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:56,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:35:56,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107899422] [2021-11-20 23:35:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:56,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:56,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:57,041 INFO L87 Difference]: Start difference. First operand has 2097 states, 1181 states have (on average 1.3022861981371718) internal successors, (1538), 1269 states have internal predecessors, (1538), 758 states have call successors, (758), 155 states have call predecessors, (758), 154 states have return successors, (751), 733 states have call predecessors, (751), 751 states have call successors, (751) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:35:59,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:01,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:03,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:05,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:10,662 INFO L93 Difference]: Finished difference Result 5506 states and 8310 transitions. [2021-11-20 23:36:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2021-11-20 23:36:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:10,736 INFO L225 Difference]: With dead ends: 5506 [2021-11-20 23:36:10,737 INFO L226 Difference]: Without dead ends: 3415 [2021-11-20 23:36:10,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:10,775 INFO L933 BasicCegarLoop]: 3253 mSDtfsCounter, 2573 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2589 SdHoareTripleChecker+Valid, 11784 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:10,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2589 Valid, 11784 Invalid, 1468 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1464 Invalid, 3 Unknown, 0 Unchecked, 13.1s Time] [2021-11-20 23:36:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2021-11-20 23:36:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3407. [2021-11-20 23:36:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 1901 states have (on average 1.28563913729616) internal successors, (2444), 2038 states have internal predecessors, (2444), 1224 states have call successors, (1224), 280 states have call predecessors, (1224), 279 states have return successors, (1221), 1192 states have call predecessors, (1221), 1221 states have call successors, (1221) [2021-11-20 23:36:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4889 transitions. [2021-11-20 23:36:11,166 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4889 transitions. Word has length 37 [2021-11-20 23:36:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:11,167 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 4889 transitions. [2021-11-20 23:36:11,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:36:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4889 transitions. [2021-11-20 23:36:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:36:11,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:11,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:11,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:36:11,178 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 23:36:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1118368096, now seen corresponding path program 1 times [2021-11-20 23:36:11,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:11,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138103753] [2021-11-20 23:36:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:11,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:11,641 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 23:36:11,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:11,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138103753] [2021-11-20 23:36:11,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138103753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:11,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:11,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:11,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078283484] [2021-11-20 23:36:11,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:11,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:11,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:11,645 INFO L87 Difference]: Start difference. First operand 3407 states and 4889 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:36:13,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:18,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:19,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:23,964 INFO L93 Difference]: Finished difference Result 3439 states and 4914 transitions. [2021-11-20 23:36:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2021-11-20 23:36:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:24,001 INFO L225 Difference]: With dead ends: 3439 [2021-11-20 23:36:24,001 INFO L226 Difference]: Without dead ends: 3437 [2021-11-20 23:36:24,004 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 23:36:24,005 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2499 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:24,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2513 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2021-11-20 23:36:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-20 23:36:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3430. [2021-11-20 23:36:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 1914 states have (on average 1.2836990595611286) internal successors, (2457), 2051 states have internal predecessors, (2457), 1226 states have call successors, (1226), 288 states have call predecessors, (1226), 287 states have return successors, (1223), 1194 states have call predecessors, (1223), 1223 states have call successors, (1223) [2021-11-20 23:36:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 4906 transitions. [2021-11-20 23:36:24,237 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 4906 transitions. Word has length 42 [2021-11-20 23:36:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:24,238 INFO L470 AbstractCegarLoop]: Abstraction has 3430 states and 4906 transitions. [2021-11-20 23:36:24,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:36:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 4906 transitions. [2021-11-20 23:36:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 23:36:24,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:24,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:24,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:36:24,246 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 23:36:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2044910572, now seen corresponding path program 1 times [2021-11-20 23:36:24,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:24,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441630664] [2021-11-20 23:36:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:24,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:36:24,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:24,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441630664] [2021-11-20 23:36:24,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441630664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:24,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:24,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:24,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005715859] [2021-11-20 23:36:24,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:24,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:24,661 INFO L87 Difference]: Start difference. First operand 3430 states and 4906 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:36:26,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:33,952 INFO L93 Difference]: Finished difference Result 3443 states and 4917 transitions. [2021-11-20 23:36:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 55 [2021-11-20 23:36:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:33,985 INFO L225 Difference]: With dead ends: 3443 [2021-11-20 23:36:33,985 INFO L226 Difference]: Without dead ends: 3441 [2021-11-20 23:36:33,988 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 23:36:33,989 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2493 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:33,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2506 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-20 23:36:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-11-20 23:36:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3434. [2021-11-20 23:36:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 1917 states have (on average 1.2832550860719876) internal successors, (2460), 2054 states have internal predecessors, (2460), 1226 states have call successors, (1226), 289 states have call predecessors, (1226), 288 states have return successors, (1223), 1194 states have call predecessors, (1223), 1223 states have call successors, (1223) [2021-11-20 23:36:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 4909 transitions. [2021-11-20 23:36:34,199 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 4909 transitions. Word has length 55 [2021-11-20 23:36:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 4909 transitions. [2021-11-20 23:36:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:36:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 4909 transitions. [2021-11-20 23:36:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 23:36:34,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:34,208 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, 1, 1] [2021-11-20 23:36:34,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:36:34,209 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 23:36:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 194562688, now seen corresponding path program 1 times [2021-11-20 23:36:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:34,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72054898] [2021-11-20 23:36:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:34,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:34,590 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 23:36:34,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72054898] [2021-11-20 23:36:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72054898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:34,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:34,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:34,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930020438] [2021-11-20 23:36:34,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:34,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:34,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:34,593 INFO L87 Difference]: Start difference. First operand 3434 states and 4909 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:36:36,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:38,568 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:40,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:45,700 INFO L93 Difference]: Finished difference Result 3447 states and 4920 transitions. [2021-11-20 23:36:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 52 [2021-11-20 23:36:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:45,733 INFO L225 Difference]: With dead ends: 3447 [2021-11-20 23:36:45,733 INFO L226 Difference]: Without dead ends: 3445 [2021-11-20 23:36:45,736 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 23:36:45,737 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2499 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:45,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-20 23:36:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-11-20 23:36:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 3438. [2021-11-20 23:36:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 1920 states have (on average 1.2828125) internal successors, (2463), 2057 states have internal predecessors, (2463), 1226 states have call successors, (1226), 290 states have call predecessors, (1226), 289 states have return successors, (1223), 1194 states have call predecessors, (1223), 1223 states have call successors, (1223) [2021-11-20 23:36:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4912 transitions. [2021-11-20 23:36:45,975 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4912 transitions. Word has length 52 [2021-11-20 23:36:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:45,975 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4912 transitions. [2021-11-20 23:36:45,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:36:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4912 transitions. [2021-11-20 23:36:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:36:45,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:45,979 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, 1] [2021-11-20 23:36:45,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:36:45,979 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 23:36:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1941017167, now seen corresponding path program 1 times [2021-11-20 23:36:45,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812886778] [2021-11-20 23:36:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:45,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:46,283 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 23:36:46,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812886778] [2021-11-20 23:36:46,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812886778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:46,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:46,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:46,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855978961] [2021-11-20 23:36:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:46,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:46,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:46,288 INFO L87 Difference]: Start difference. First operand 3438 states and 4912 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:36:48,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:50,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:36:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:54,848 INFO L93 Difference]: Finished difference Result 3451 states and 4923 transitions. [2021-11-20 23:36:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:54,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 57 [2021-11-20 23:36:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:54,878 INFO L225 Difference]: With dead ends: 3451 [2021-11-20 23:36:54,878 INFO L226 Difference]: Without dead ends: 3449 [2021-11-20 23:36:54,881 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 23:36:54,882 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2499 mSDsluCounter, 9584 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:54,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2510 Valid, 11757 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1471 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2021-11-20 23:36:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-11-20 23:36:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3442. [2021-11-20 23:36:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 1923 states have (on average 1.282371294851794) internal successors, (2466), 2060 states have internal predecessors, (2466), 1226 states have call successors, (1226), 291 states have call predecessors, (1226), 290 states have return successors, (1223), 1194 states have call predecessors, (1223), 1223 states have call successors, (1223) [2021-11-20 23:36:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 4915 transitions. [2021-11-20 23:36:55,089 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 4915 transitions. Word has length 57 [2021-11-20 23:36:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:55,091 INFO L470 AbstractCegarLoop]: Abstraction has 3442 states and 4915 transitions. [2021-11-20 23:36:55,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:36:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 4915 transitions. [2021-11-20 23:36:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 23:36:55,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:55,095 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-11-20 23:36:55,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:36:55,096 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 23:36:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash -95526693, now seen corresponding path program 1 times [2021-11-20 23:36:55,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:55,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062587055] [2021-11-20 23:36:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:55,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 23:36:55,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062587055] [2021-11-20 23:36:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062587055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:55,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:55,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832404369] [2021-11-20 23:36:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:55,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:55,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:55,439 INFO L87 Difference]: Start difference. First operand 3442 states and 4915 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:36:57,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:00,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:01,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:03,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:07,011 INFO L93 Difference]: Finished difference Result 3455 states and 4926 transitions. [2021-11-20 23:37:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:37:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 70 [2021-11-20 23:37:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:07,039 INFO L225 Difference]: With dead ends: 3455 [2021-11-20 23:37:07,039 INFO L226 Difference]: Without dead ends: 3453 [2021-11-20 23:37:07,041 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 23:37:07,042 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2493 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:07,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2503 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1473 Invalid, 3 Unknown, 0 Unchecked, 11.4s Time] [2021-11-20 23:37:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2021-11-20 23:37:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 3446. [2021-11-20 23:37:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 1926 states have (on average 1.2819314641744548) internal successors, (2469), 2063 states have internal predecessors, (2469), 1226 states have call successors, (1226), 292 states have call predecessors, (1226), 291 states have return successors, (1223), 1194 states have call predecessors, (1223), 1223 states have call successors, (1223) [2021-11-20 23:37:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 4918 transitions. [2021-11-20 23:37:07,244 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 4918 transitions. Word has length 70 [2021-11-20 23:37:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:07,245 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 4918 transitions. [2021-11-20 23:37:07,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:37:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 4918 transitions. [2021-11-20 23:37:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 23:37:07,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:07,247 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-11-20 23:37:07,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:37:07,247 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 23:37:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 9235540, now seen corresponding path program 1 times [2021-11-20 23:37:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058731052] [2021-11-20 23:37:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:07,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 23:37:07,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058731052] [2021-11-20 23:37:07,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058731052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:07,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:07,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:07,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235626193] [2021-11-20 23:37:07,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:07,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:07,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:07,522 INFO L87 Difference]: Start difference. First operand 3446 states and 4918 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:37:09,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:12,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:18,160 INFO L93 Difference]: Finished difference Result 6174 states and 8796 transitions. [2021-11-20 23:37:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:37:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 75 [2021-11-20 23:37:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:18,213 INFO L225 Difference]: With dead ends: 6174 [2021-11-20 23:37:18,213 INFO L226 Difference]: Without dead ends: 6172 [2021-11-20 23:37:18,217 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 23:37:18,218 INFO L933 BasicCegarLoop]: 3958 mSDtfsCounter, 2485 mSDsluCounter, 11839 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2492 SdHoareTripleChecker+Valid, 14430 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:18,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2492 Valid, 14430 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1894 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-11-20 23:37:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2021-11-20 23:37:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 6161. [2021-11-20 23:37:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6161 states, 3448 states have (on average 1.2766821345707657) internal successors, (4402), 3694 states have internal predecessors, (4402), 2178 states have call successors, (2178), 554 states have call predecessors, (2178), 532 states have return successors, (2206), 2094 states have call predecessors, (2206), 2172 states have call successors, (2206) [2021-11-20 23:37:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 8786 transitions. [2021-11-20 23:37:18,601 INFO L78 Accepts]: Start accepts. Automaton has 6161 states and 8786 transitions. Word has length 75 [2021-11-20 23:37:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:18,601 INFO L470 AbstractCegarLoop]: Abstraction has 6161 states and 8786 transitions. [2021-11-20 23:37:18,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:37:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6161 states and 8786 transitions. [2021-11-20 23:37:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:37:18,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:18,604 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, 1] [2021-11-20 23:37:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:37:18,605 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 23:37:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1837421760, now seen corresponding path program 1 times [2021-11-20 23:37:18,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139547443] [2021-11-20 23:37:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:18,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:18,945 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 23:37:18,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:18,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139547443] [2021-11-20 23:37:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139547443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:18,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:18,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:18,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651915146] [2021-11-20 23:37:18,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:18,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:18,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:18,947 INFO L87 Difference]: Start difference. First operand 6161 states and 8786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:37:20,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:22,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:24,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:27,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:30,144 INFO L93 Difference]: Finished difference Result 6171 states and 8795 transitions. [2021-11-20 23:37:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:37:30,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 72 [2021-11-20 23:37:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:30,187 INFO L225 Difference]: With dead ends: 6171 [2021-11-20 23:37:30,188 INFO L226 Difference]: Without dead ends: 6169 [2021-11-20 23:37:30,192 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 23:37:30,193 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 2998 mSDsluCounter, 6025 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3004 SdHoareTripleChecker+Valid, 7941 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:30,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3004 Valid, 7941 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1126 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2021-11-20 23:37:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2021-11-20 23:37:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 6169. [2021-11-20 23:37:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 3454 states have (on average 1.2762015055008686) internal successors, (4408), 3700 states have internal predecessors, (4408), 2178 states have call successors, (2178), 556 states have call predecessors, (2178), 534 states have return successors, (2206), 2094 states have call predecessors, (2206), 2172 states have call successors, (2206) [2021-11-20 23:37:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 8792 transitions. [2021-11-20 23:37:30,562 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 8792 transitions. Word has length 72 [2021-11-20 23:37:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,564 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 8792 transitions. [2021-11-20 23:37:30,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 23:37:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 8792 transitions. [2021-11-20 23:37:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:37:30,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,572 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:30,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:37:30,572 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 23:37:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,573 INFO L85 PathProgramCache]: Analyzing trace with hash -479834353, now seen corresponding path program 1 times [2021-11-20 23:37:30,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089029204] [2021-11-20 23:37:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,843 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 23:37:30,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089029204] [2021-11-20 23:37:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089029204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:30,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:30,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385087113] [2021-11-20 23:37:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:30,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:30,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:30,847 INFO L87 Difference]: Start difference. First operand 6169 states and 8792 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:37:32,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:34,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:36,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:38,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:46,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:48,513 WARN L515 Checker$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 23:37:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:49,153 INFO L93 Difference]: Finished difference Result 12084 states and 17303 transitions. [2021-11-20 23:37:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:37:49,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2021-11-20 23:37:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:49,223 INFO L225 Difference]: With dead ends: 12084 [2021-11-20 23:37:49,223 INFO L226 Difference]: Without dead ends: 12082 [2021-11-20 23:37:49,230 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 23:37:49,233 INFO L933 BasicCegarLoop]: 3672 mSDtfsCounter, 2881 mSDsluCounter, 11169 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2886 SdHoareTripleChecker+Valid, 13601 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:49,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2886 Valid, 13601 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1697 Invalid, 5 Unknown, 0 Unchecked, 17.8s Time] [2021-11-20 23:37:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2021-11-20 23:37:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 12049. [2021-11-20 23:37:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12049 states, 6769 states have (on average 1.2758162210075343) internal successors, (8636), 7248 states have internal predecessors, (8636), 4232 states have call successors, (4232), 1097 states have call predecessors, (4232), 1045 states have return successors, (4398), 4056 states have call predecessors, (4398), 4220 states have call successors, (4398) [2021-11-20 23:37:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12049 states to 12049 states and 17266 transitions. [2021-11-20 23:37:49,985 INFO L78 Accepts]: Start accepts. Automaton has 12049 states and 17266 transitions. Word has length 77 [2021-11-20 23:37:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:49,986 INFO L470 AbstractCegarLoop]: Abstraction has 12049 states and 17266 transitions. [2021-11-20 23:37:49,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 23:37:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 12049 states and 17266 transitions. [2021-11-20 23:37:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 23:37:49,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:49,989 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:49,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:37:49,990 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 23:37:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1471347232, now seen corresponding path program 1 times [2021-11-20 23:37:49,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:49,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613061796] [2021-11-20 23:37:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:49,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:50,241 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 23:37:50,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613061796] [2021-11-20 23:37:50,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613061796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:50,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:50,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:50,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164559324] [2021-11-20 23:37:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:50,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:50,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:50,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:50,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:50,244 INFO L87 Difference]: Start difference. First operand 12049 states and 17266 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:37:52,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:54,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:55,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:37:57,761 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:01,851 INFO L93 Difference]: Finished difference Result 12083 states and 17301 transitions. [2021-11-20 23:38:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2021-11-20 23:38:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:01,913 INFO L225 Difference]: With dead ends: 12083 [2021-11-20 23:38:01,913 INFO L226 Difference]: Without dead ends: 12081 [2021-11-20 23:38:01,921 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 23:38:01,922 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2499 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:01,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2505 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1474 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2021-11-20 23:38:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-11-20 23:38:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 12077. [2021-11-20 23:38:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12077 states, 6789 states have (on average 1.2750036824274562) internal successors, (8656), 7272 states have internal predecessors, (8656), 4232 states have call successors, (4232), 1101 states have call predecessors, (4232), 1053 states have return successors, (4406), 4056 states have call predecessors, (4406), 4220 states have call successors, (4406) [2021-11-20 23:38:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12077 states to 12077 states and 17294 transitions. [2021-11-20 23:38:02,682 INFO L78 Accepts]: Start accepts. Automaton has 12077 states and 17294 transitions. Word has length 82 [2021-11-20 23:38:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:02,683 INFO L470 AbstractCegarLoop]: Abstraction has 12077 states and 17294 transitions. [2021-11-20 23:38:02,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:38:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12077 states and 17294 transitions. [2021-11-20 23:38:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 23:38:02,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:02,687 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:02,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:38:02,688 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 23:38:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1620366484, now seen corresponding path program 1 times [2021-11-20 23:38:02,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:02,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270275523] [2021-11-20 23:38:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:02,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-20 23:38:02,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270275523] [2021-11-20 23:38:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270275523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:02,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:38:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084018225] [2021-11-20 23:38:02,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:02,997 INFO L87 Difference]: Start difference. First operand 12077 states and 17294 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:38:05,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:07,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:08,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:11,908 INFO L93 Difference]: Finished difference Result 12099 states and 17313 transitions. [2021-11-20 23:38:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2021-11-20 23:38:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:11,970 INFO L225 Difference]: With dead ends: 12099 [2021-11-20 23:38:11,970 INFO L226 Difference]: Without dead ends: 12097 [2021-11-20 23:38:11,978 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 23:38:11,979 INFO L933 BasicCegarLoop]: 3235 mSDtfsCounter, 2493 mSDsluCounter, 9587 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 11757 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2498 Valid, 11757 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-20 23:38:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12097 states. [2021-11-20 23:38:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12097 to 12093. [2021-11-20 23:38:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12093 states, 6801 states have (on average 1.2745184531686518) internal successors, (8668), 7284 states have internal predecessors, (8668), 4232 states have call successors, (4232), 1105 states have call predecessors, (4232), 1057 states have return successors, (4406), 4056 states have call predecessors, (4406), 4220 states have call successors, (4406) [2021-11-20 23:38:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12093 states to 12093 states and 17306 transitions. [2021-11-20 23:38:12,833 INFO L78 Accepts]: Start accepts. Automaton has 12093 states and 17306 transitions. Word has length 95 [2021-11-20 23:38:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:12,833 INFO L470 AbstractCegarLoop]: Abstraction has 12093 states and 17306 transitions. [2021-11-20 23:38:12,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:38:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 12093 states and 17306 transitions. [2021-11-20 23:38:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 23:38:12,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:12,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:12,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:38:12,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:38:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2022759465, now seen corresponding path program 1 times [2021-11-20 23:38:12,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466004006] [2021-11-20 23:38:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:12,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 23:38:13,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:13,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466004006] [2021-11-20 23:38:13,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466004006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:13,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:13,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:13,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303188075] [2021-11-20 23:38:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:13,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:38:13,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:38:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:13,085 INFO L87 Difference]: Start difference. First operand 12093 states and 17306 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:38:15,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:18,783 INFO L93 Difference]: Finished difference Result 23866 states and 34081 transitions. [2021-11-20 23:38:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:38:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-20 23:38:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:18,853 INFO L225 Difference]: With dead ends: 23866 [2021-11-20 23:38:18,853 INFO L226 Difference]: Without dead ends: 12081 [2021-11-20 23:38:18,929 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 23:38:18,930 INFO L933 BasicCegarLoop]: 3166 mSDtfsCounter, 2510 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 5239 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:18,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2511 Valid, 5239 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 667 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 23:38:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-11-20 23:38:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 12077. [2021-11-20 23:38:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12077 states, 6793 states have (on average 1.2742529074046813) internal successors, (8656), 7276 states have internal predecessors, (8656), 4224 states have call successors, (4224), 1105 states have call predecessors, (4224), 1057 states have return successors, (4382), 4048 states have call predecessors, (4382), 4212 states have call successors, (4382) [2021-11-20 23:38:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12077 states to 12077 states and 17262 transitions. [2021-11-20 23:38:19,747 INFO L78 Accepts]: Start accepts. Automaton has 12077 states and 17262 transitions. Word has length 94 [2021-11-20 23:38:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 12077 states and 17262 transitions. [2021-11-20 23:38:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 23:38:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 12077 states and 17262 transitions. [2021-11-20 23:38:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 23:38:19,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:19,751 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-11-20 23:38:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:38:19,751 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 23:38:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 261643003, now seen corresponding path program 1 times [2021-11-20 23:38:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681599553] [2021-11-20 23:38:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-20 23:38:20,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:20,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681599553] [2021-11-20 23:38:20,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681599553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:20,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:20,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:38:20,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820754146] [2021-11-20 23:38:20,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:20,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:20,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:20,015 INFO L87 Difference]: Start difference. First operand 12077 states and 17262 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:38:21,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:23,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:25,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:27,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:31,235 INFO L93 Difference]: Finished difference Result 12095 states and 17279 transitions. [2021-11-20 23:38:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 100 [2021-11-20 23:38:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:31,283 INFO L225 Difference]: With dead ends: 12095 [2021-11-20 23:38:31,284 INFO L226 Difference]: Without dead ends: 12093 [2021-11-20 23:38:31,290 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 23:38:31,291 INFO L933 BasicCegarLoop]: 2647 mSDtfsCounter, 2985 mSDsluCounter, 6011 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2987 SdHoareTripleChecker+Valid, 7920 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:31,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2987 Valid, 7920 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1126 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2021-11-20 23:38:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12093 states. [2021-11-20 23:38:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12093 to 12093. [2021-11-20 23:38:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12093 states, 6805 states have (on average 1.2737692872887583) internal successors, (8668), 7288 states have internal predecessors, (8668), 4224 states have call successors, (4224), 1109 states have call predecessors, (4224), 1061 states have return successors, (4382), 4048 states have call predecessors, (4382), 4212 states have call successors, (4382) [2021-11-20 23:38:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12093 states to 12093 states and 17274 transitions. [2021-11-20 23:38:32,070 INFO L78 Accepts]: Start accepts. Automaton has 12093 states and 17274 transitions. Word has length 100 [2021-11-20 23:38:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:32,071 INFO L470 AbstractCegarLoop]: Abstraction has 12093 states and 17274 transitions. [2021-11-20 23:38:32,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (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 23:38:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 12093 states and 17274 transitions. [2021-11-20 23:38:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 23:38:32,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:32,074 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:32,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:38:32,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:38:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1548168012, now seen corresponding path program 1 times [2021-11-20 23:38:32,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:32,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838508097] [2021-11-20 23:38:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:32,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-20 23:38:32,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838508097] [2021-11-20 23:38:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838508097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:32,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:38:32,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386934996] [2021-11-20 23:38:32,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:32,337 INFO L87 Difference]: Start difference. First operand 12093 states and 17274 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:38:34,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:35,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:37,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:40,017 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:42,983 INFO L93 Difference]: Finished difference Result 12111 states and 17291 transitions. [2021-11-20 23:38:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2021-11-20 23:38:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:43,042 INFO L225 Difference]: With dead ends: 12111 [2021-11-20 23:38:43,042 INFO L226 Difference]: Without dead ends: 12107 [2021-11-20 23:38:43,050 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 23:38:43,051 INFO L933 BasicCegarLoop]: 2647 mSDtfsCounter, 2985 mSDsluCounter, 6011 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 7920 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:43,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2986 Valid, 7920 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1127 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-20 23:38:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12107 states. [2021-11-20 23:38:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12107 to 12107. [2021-11-20 23:38:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 6816 states have (on average 1.273180751173709) internal successors, (8678), 7298 states have internal predecessors, (8678), 4224 states have call successors, (4224), 1113 states have call predecessors, (4224), 1064 states have return successors, (4382), 4048 states have call predecessors, (4382), 4212 states have call successors, (4382) [2021-11-20 23:38:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 17284 transitions. [2021-11-20 23:38:43,774 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 17284 transitions. Word has length 105 [2021-11-20 23:38:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:43,774 INFO L470 AbstractCegarLoop]: Abstraction has 12107 states and 17284 transitions. [2021-11-20 23:38:43,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:38:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 17284 transitions. [2021-11-20 23:38:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 23:38:43,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:43,778 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 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] [2021-11-20 23:38:43,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:38:43,779 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 23:38:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1621303745, now seen corresponding path program 1 times [2021-11-20 23:38:43,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:43,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654175802] [2021-11-20 23:38:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:43,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-20 23:38:44,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:44,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654175802] [2021-11-20 23:38:44,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654175802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:44,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:44,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:38:44,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206571266] [2021-11-20 23:38:44,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:44,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:44,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:44,120 INFO L87 Difference]: Start difference. First operand 12107 states and 17284 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 23:38:46,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:52,803 INFO L93 Difference]: Finished difference Result 17642 states and 25065 transitions. [2021-11-20 23:38:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:38:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 120 [2021-11-20 23:38:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:52,881 INFO L225 Difference]: With dead ends: 17642 [2021-11-20 23:38:52,881 INFO L226 Difference]: Without dead ends: 17640 [2021-11-20 23:38:52,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:38:52,891 INFO L933 BasicCegarLoop]: 3130 mSDtfsCounter, 2706 mSDsluCounter, 8977 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2709 SdHoareTripleChecker+Valid, 11097 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:52,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2709 Valid, 11097 Invalid, 1408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1404 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 23:38:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2021-11-20 23:38:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 17336. [2021-11-20 23:38:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17336 states, 9831 states have (on average 1.266910792391415) internal successors, (12455), 10482 states have internal predecessors, (12455), 5869 states have call successors, (5869), 1765 states have call predecessors, (5869), 1633 states have return successors, (6427), 5540 states have call predecessors, (6427), 5857 states have call successors, (6427) [2021-11-20 23:38:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17336 states to 17336 states and 24751 transitions. [2021-11-20 23:38:53,922 INFO L78 Accepts]: Start accepts. Automaton has 17336 states and 24751 transitions. Word has length 120 [2021-11-20 23:38:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:53,922 INFO L470 AbstractCegarLoop]: Abstraction has 17336 states and 24751 transitions. [2021-11-20 23:38:53,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 23:38:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17336 states and 24751 transitions. [2021-11-20 23:38:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 23:38:53,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:53,928 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1] [2021-11-20 23:38:53,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:38:53,928 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:38:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1438629920, now seen corresponding path program 1 times [2021-11-20 23:38:53,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286697142] [2021-11-20 23:38:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:53,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-20 23:38:54,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286697142] [2021-11-20 23:38:54,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286697142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:54,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:54,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:38:54,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184782124] [2021-11-20 23:38:54,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:54,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:54,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:54,200 INFO L87 Difference]: Start difference. First operand 17336 states and 24751 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:38:56,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:58,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:02,995 INFO L93 Difference]: Finished difference Result 17654 states and 25069 transitions. [2021-11-20 23:39:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:39:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 102 [2021-11-20 23:39:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:03,066 INFO L225 Difference]: With dead ends: 17654 [2021-11-20 23:39:03,066 INFO L226 Difference]: Without dead ends: 17484 [2021-11-20 23:39:03,073 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 23:39:03,074 INFO L933 BasicCegarLoop]: 3136 mSDtfsCounter, 2729 mSDsluCounter, 8971 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2729 SdHoareTripleChecker+Valid, 11097 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:03,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2729 Valid, 11097 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1413 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:39:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17484 states. [2021-11-20 23:39:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17484 to 17458. [2021-11-20 23:39:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17458 states, 9904 states have (on average 1.2647415185783522) internal successors, (12526), 10554 states have internal predecessors, (12526), 5896 states have call successors, (5896), 1790 states have call predecessors, (5896), 1655 states have return successors, (6443), 5565 states have call predecessors, (6443), 5874 states have call successors, (6443) [2021-11-20 23:39:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17458 states to 17458 states and 24865 transitions. [2021-11-20 23:39:04,426 INFO L78 Accepts]: Start accepts. Automaton has 17458 states and 24865 transitions. Word has length 102 [2021-11-20 23:39:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:04,426 INFO L470 AbstractCegarLoop]: Abstraction has 17458 states and 24865 transitions. [2021-11-20 23:39:04,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:39:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 17458 states and 24865 transitions. [2021-11-20 23:39:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:39:04,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:04,432 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:39:04,432 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:39:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 392401905, now seen corresponding path program 1 times [2021-11-20 23:39:04,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683381516] [2021-11-20 23:39:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:04,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 23:39:04,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683381516] [2021-11-20 23:39:04,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683381516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:04,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:04,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:04,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78390396] [2021-11-20 23:39:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:04,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:04,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:04,737 INFO L87 Difference]: Start difference. First operand 17458 states and 24865 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:39:07,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:09,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:14,167 INFO L93 Difference]: Finished difference Result 18275 states and 25845 transitions. [2021-11-20 23:39:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:39:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2021-11-20 23:39:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:14,251 INFO L225 Difference]: With dead ends: 18275 [2021-11-20 23:39:14,252 INFO L226 Difference]: Without dead ends: 18261 [2021-11-20 23:39:14,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:39:14,266 INFO L933 BasicCegarLoop]: 2976 mSDtfsCounter, 691 mSDsluCounter, 9555 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 11309 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:14,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 11309 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1673 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:39:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18261 states. [2021-11-20 23:39:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18261 to 18234. [2021-11-20 23:39:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18234 states, 10340 states have (on average 1.2604448742746615) internal successors, (13033), 10998 states have internal predecessors, (13033), 6086 states have call successors, (6086), 1941 states have call predecessors, (6086), 1805 states have return successors, (6676), 5752 states have call predecessors, (6676), 6065 states have call successors, (6676) [2021-11-20 23:39:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18234 states to 18234 states and 25795 transitions. [2021-11-20 23:39:15,699 INFO L78 Accepts]: Start accepts. Automaton has 18234 states and 25795 transitions. Word has length 146 [2021-11-20 23:39:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:15,700 INFO L470 AbstractCegarLoop]: Abstraction has 18234 states and 25795 transitions. [2021-11-20 23:39:15,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:39:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18234 states and 25795 transitions. [2021-11-20 23:39:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 23:39:15,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:15,704 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:15,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:39:15,704 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 23:39:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash 87594185, now seen corresponding path program 1 times [2021-11-20 23:39:15,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:15,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864400672] [2021-11-20 23:39:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:15,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-20 23:39:16,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864400672] [2021-11-20 23:39:16,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864400672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:16,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:16,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:16,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505559386] [2021-11-20 23:39:16,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:16,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:16,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:16,027 INFO L87 Difference]: Start difference. First operand 18234 states and 25795 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:39:17,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:18,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:20,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:25,530 INFO L93 Difference]: Finished difference Result 20528 states and 28672 transitions. [2021-11-20 23:39:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:39:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2021-11-20 23:39:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:25,619 INFO L225 Difference]: With dead ends: 20528 [2021-11-20 23:39:25,619 INFO L226 Difference]: Without dead ends: 20526 [2021-11-20 23:39:25,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:39:25,632 INFO L933 BasicCegarLoop]: 3398 mSDtfsCounter, 2658 mSDsluCounter, 9226 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2661 SdHoareTripleChecker+Valid, 11579 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:25,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2661 Valid, 11579 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 23:39:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20526 states. [2021-11-20 23:39:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20526 to 20506. [2021-11-20 23:39:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20506 states, 11544 states have (on average 1.2518191268191268) internal successors, (14451), 12262 states have internal predecessors, (14451), 6800 states have call successors, (6800), 2309 states have call predecessors, (6800), 2159 states have return successors, (7390), 6442 states have call predecessors, (7390), 6779 states have call successors, (7390) [2021-11-20 23:39:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20506 states to 20506 states and 28641 transitions. [2021-11-20 23:39:26,850 INFO L78 Accepts]: Start accepts. Automaton has 20506 states and 28641 transitions. Word has length 152 [2021-11-20 23:39:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:26,851 INFO L470 AbstractCegarLoop]: Abstraction has 20506 states and 28641 transitions. [2021-11-20 23:39:26,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:39:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20506 states and 28641 transitions. [2021-11-20 23:39:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 23:39:26,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:26,857 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:26,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:39:26,858 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 23:39:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1760337478, now seen corresponding path program 1 times [2021-11-20 23:39:26,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23380558] [2021-11-20 23:39:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:26,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-20 23:39:27,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:27,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23380558] [2021-11-20 23:39:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23380558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:27,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:27,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:27,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288888590] [2021-11-20 23:39:27,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:27,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:27,282 INFO L87 Difference]: Start difference. First operand 20506 states and 28641 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:39:29,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:32,811 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:34,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:37,767 INFO L93 Difference]: Finished difference Result 20532 states and 28664 transitions. [2021-11-20 23:39:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:39:37,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 161 [2021-11-20 23:39:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:37,836 INFO L225 Difference]: With dead ends: 20532 [2021-11-20 23:39:37,836 INFO L226 Difference]: Without dead ends: 20530 [2021-11-20 23:39:37,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:39:37,848 INFO L933 BasicCegarLoop]: 2757 mSDtfsCounter, 2689 mSDsluCounter, 6954 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 8879 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:37,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 8879 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1217 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2021-11-20 23:39:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20530 states. [2021-11-20 23:39:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20530 to 20514. [2021-11-20 23:39:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20514 states, 11550 states have (on average 1.2512554112554113) internal successors, (14452), 12268 states have internal predecessors, (14452), 6800 states have call successors, (6800), 2311 states have call predecessors, (6800), 2161 states have return successors, (7390), 6442 states have call predecessors, (7390), 6779 states have call successors, (7390) [2021-11-20 23:39:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20514 states to 20514 states and 28642 transitions. [2021-11-20 23:39:39,121 INFO L78 Accepts]: Start accepts. Automaton has 20514 states and 28642 transitions. Word has length 161 [2021-11-20 23:39:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:39,122 INFO L470 AbstractCegarLoop]: Abstraction has 20514 states and 28642 transitions. [2021-11-20 23:39:39,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:39:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 20514 states and 28642 transitions. [2021-11-20 23:39:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 23:39:39,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:39,130 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:39,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:39:39,130 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:39:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:39,131 INFO L85 PathProgramCache]: Analyzing trace with hash 927177445, now seen corresponding path program 1 times [2021-11-20 23:39:39,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:39,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554798111] [2021-11-20 23:39:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:39,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-20 23:39:39,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:39,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554798111] [2021-11-20 23:39:39,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554798111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:39,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:39,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:39,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545125671] [2021-11-20 23:39:39,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:39,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:39,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:39,428 INFO L87 Difference]: Start difference. First operand 20514 states and 28642 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:39:41,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:45,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:46,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:51,228 INFO L93 Difference]: Finished difference Result 20552 states and 28677 transitions. [2021-11-20 23:39:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:39:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 177 [2021-11-20 23:39:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:51,287 INFO L225 Difference]: With dead ends: 20552 [2021-11-20 23:39:51,288 INFO L226 Difference]: Without dead ends: 20550 [2021-11-20 23:39:51,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:39:51,297 INFO L933 BasicCegarLoop]: 3322 mSDtfsCounter, 1559 mSDsluCounter, 10245 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 12319 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:51,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 12319 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1718 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-20 23:39:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20550 states. [2021-11-20 23:39:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20550 to 20530. [2021-11-20 23:39:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20530 states, 11562 states have (on average 1.2504756962463242) internal successors, (14458), 12280 states have internal predecessors, (14458), 6800 states have call successors, (6800), 2315 states have call predecessors, (6800), 2165 states have return successors, (7390), 6442 states have call predecessors, (7390), 6779 states have call successors, (7390) [2021-11-20 23:39:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20530 states to 20530 states and 28648 transitions. [2021-11-20 23:39:52,475 INFO L78 Accepts]: Start accepts. Automaton has 20530 states and 28648 transitions. Word has length 177 [2021-11-20 23:39:52,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:52,476 INFO L470 AbstractCegarLoop]: Abstraction has 20530 states and 28648 transitions. [2021-11-20 23:39:52,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 23:39:52,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20530 states and 28648 transitions. [2021-11-20 23:39:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 23:39:52,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:52,490 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:52,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:39:52,491 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 23:39:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:52,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1203948190, now seen corresponding path program 1 times [2021-11-20 23:39:52,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:52,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390243648] [2021-11-20 23:39:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:52,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-20 23:39:52,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:52,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390243648] [2021-11-20 23:39:52,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390243648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:52,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:52,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:39:52,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125064728] [2021-11-20 23:39:52,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:52,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:39:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:39:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:39:52,843 INFO L87 Difference]: Start difference. First operand 20530 states and 28648 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:39:55,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:58,013 WARN L515 Checker$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 23:40:01,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:04,472 INFO L93 Difference]: Finished difference Result 21034 states and 29196 transitions. [2021-11-20 23:40:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:40:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 236 [2021-11-20 23:40:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:04,539 INFO L225 Difference]: With dead ends: 21034 [2021-11-20 23:40:04,539 INFO L226 Difference]: Without dead ends: 21032 [2021-11-20 23:40:04,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:40:04,549 INFO L933 BasicCegarLoop]: 2685 mSDtfsCounter, 2883 mSDsluCounter, 6267 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2886 SdHoareTripleChecker+Valid, 8195 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:04,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2886 Valid, 8195 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1136 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2021-11-20 23:40:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2021-11-20 23:40:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21030. [2021-11-20 23:40:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21030 states, 11819 states have (on average 1.2452830188679245) internal successors, (14718), 12538 states have internal predecessors, (14718), 6937 states have call successors, (6937), 2421 states have call predecessors, (6937), 2271 states have return successors, (7527), 6579 states have call predecessors, (7527), 6916 states have call successors, (7527) [2021-11-20 23:40:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21030 states to 21030 states and 29182 transitions. [2021-11-20 23:40:05,646 INFO L78 Accepts]: Start accepts. Automaton has 21030 states and 29182 transitions. Word has length 236 [2021-11-20 23:40:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:05,647 INFO L470 AbstractCegarLoop]: Abstraction has 21030 states and 29182 transitions. [2021-11-20 23:40:05,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:40:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 21030 states and 29182 transitions. [2021-11-20 23:40:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-20 23:40:05,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:05,660 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:40:05,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:40:05,661 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:40:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:05,662 INFO L85 PathProgramCache]: Analyzing trace with hash -305083153, now seen corresponding path program 1 times [2021-11-20 23:40:05,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:05,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536782015] [2021-11-20 23:40:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:05,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-20 23:40:05,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536782015] [2021-11-20 23:40:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536782015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:05,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:40:05,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538926124] [2021-11-20 23:40:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:05,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:05,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:05,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:05,922 INFO L87 Difference]: Start difference. First operand 21030 states and 29182 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-20 23:40:07,832 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:09,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:10,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:13,440 INFO L93 Difference]: Finished difference Result 42080 states and 58766 transitions. [2021-11-20 23:40:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 253 [2021-11-20 23:40:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:13,527 INFO L225 Difference]: With dead ends: 42080 [2021-11-20 23:40:13,527 INFO L226 Difference]: Without dead ends: 21066 [2021-11-20 23:40:13,641 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 23:40:13,642 INFO L933 BasicCegarLoop]: 2650 mSDtfsCounter, 1 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5290 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:13,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5290 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-20 23:40:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21066 states. [2021-11-20 23:40:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21066 to 21036. [2021-11-20 23:40:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21036 states, 11825 states have (on average 1.2451585623678647) internal successors, (14724), 12544 states have internal predecessors, (14724), 6937 states have call successors, (6937), 2421 states have call predecessors, (6937), 2271 states have return successors, (7527), 6579 states have call predecessors, (7527), 6916 states have call successors, (7527) [2021-11-20 23:40:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21036 states to 21036 states and 29188 transitions. [2021-11-20 23:40:15,413 INFO L78 Accepts]: Start accepts. Automaton has 21036 states and 29188 transitions. Word has length 253 [2021-11-20 23:40:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 21036 states and 29188 transitions. [2021-11-20 23:40:15,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-20 23:40:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 21036 states and 29188 transitions. [2021-11-20 23:40:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-20 23:40:15,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:15,430 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:15,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 23:40:15,430 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 23:40:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1286628477, now seen corresponding path program 1 times [2021-11-20 23:40:15,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181399401] [2021-11-20 23:40:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:15,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 23:40:15,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:15,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181399401] [2021-11-20 23:40:15,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181399401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:15,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:15,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:40:15,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440845936] [2021-11-20 23:40:15,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:15,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:40:15,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:40:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:15,736 INFO L87 Difference]: Start difference. First operand 21036 states and 29188 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-20 23:40:18,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:21,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:22,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:24,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:29,538 INFO L93 Difference]: Finished difference Result 42752 states and 59619 transitions. [2021-11-20 23:40:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:40:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 254 [2021-11-20 23:40:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:29,610 INFO L225 Difference]: With dead ends: 42752 [2021-11-20 23:40:29,610 INFO L226 Difference]: Without dead ends: 21732 [2021-11-20 23:40:29,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:40:29,670 INFO L933 BasicCegarLoop]: 3170 mSDtfsCounter, 2677 mSDsluCounter, 9452 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2682 SdHoareTripleChecker+Valid, 11577 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:29,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2682 Valid, 11577 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1496 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-20 23:40:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21732 states. [2021-11-20 23:40:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21732 to 21312. [2021-11-20 23:40:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21312 states, 12009 states have (on average 1.2477308685152801) internal successors, (14984), 12750 states have internal predecessors, (14984), 7027 states have call successors, (7027), 2421 states have call predecessors, (7027), 2273 states have return successors, (7641), 6673 states have call predecessors, (7641), 7006 states have call successors, (7641) [2021-11-20 23:40:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21312 states to 21312 states and 29652 transitions. [2021-11-20 23:40:30,935 INFO L78 Accepts]: Start accepts. Automaton has 21312 states and 29652 transitions. Word has length 254 [2021-11-20 23:40:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:30,936 INFO L470 AbstractCegarLoop]: Abstraction has 21312 states and 29652 transitions. [2021-11-20 23:40:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-20 23:40:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 21312 states and 29652 transitions. [2021-11-20 23:40:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-20 23:40:30,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:30,955 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:30,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 23:40:30,955 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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 23:40:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash -244754431, now seen corresponding path program 1 times [2021-11-20 23:40:30,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899692147] [2021-11-20 23:40:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:30,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-11-20 23:40:31,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899692147] [2021-11-20 23:40:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899692147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:31,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:31,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:40:31,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793385970] [2021-11-20 23:40:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:40:31,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:40:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:40:31,599 INFO L87 Difference]: Start difference. First operand 21312 states and 29652 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2021-11-20 23:40:34,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:38,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:46,021 INFO L93 Difference]: Finished difference Result 21346 states and 29684 transitions. [2021-11-20 23:40:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:40:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) Word has length 267 [2021-11-20 23:40:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:46,096 INFO L225 Difference]: With dead ends: 21346 [2021-11-20 23:40:46,097 INFO L226 Difference]: Without dead ends: 21284 [2021-11-20 23:40:46,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:40:46,107 INFO L933 BasicCegarLoop]: 3104 mSDtfsCounter, 3285 mSDsluCounter, 7253 mSDsCounter, 0 mSdLazyCounter, 3890 mSolverCounterSat, 436 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3593 SdHoareTripleChecker+Valid, 9480 SdHoareTripleChecker+Invalid, 4328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 3890 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:46,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3593 Valid, 9480 Invalid, 4328 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [436 Valid, 3890 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2021-11-20 23:40:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21284 states. [2021-11-20 23:40:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21284 to 21074. [2021-11-20 23:40:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21074 states, 11871 states have (on average 1.2499368208238564) internal successors, (14838), 12610 states have internal predecessors, (14838), 6967 states have call successors, (6967), 2377 states have call predecessors, (6967), 2233 states have return successors, (7592), 6619 states have call predecessors, (7592), 6958 states have call successors, (7592) [2021-11-20 23:40:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21074 states to 21074 states and 29397 transitions. [2021-11-20 23:40:47,350 INFO L78 Accepts]: Start accepts. Automaton has 21074 states and 29397 transitions. Word has length 267 [2021-11-20 23:40:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:47,351 INFO L470 AbstractCegarLoop]: Abstraction has 21074 states and 29397 transitions. [2021-11-20 23:40:47,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2021-11-20 23:40:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 21074 states and 29397 transitions. [2021-11-20 23:40:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-20 23:40:47,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:47,368 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:47,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 23:40:47,369 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:40:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:47,369 INFO L85 PathProgramCache]: Analyzing trace with hash 204020539, now seen corresponding path program 1 times [2021-11-20 23:40:47,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:47,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288030818] [2021-11-20 23:40:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:47,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-20 23:40:49,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288030818] [2021-11-20 23:40:49,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288030818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:40:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677564083] [2021-11-20 23:40:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:49,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:40:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:40:49,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:40:49,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:40:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:50,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 6476 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:40:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:40:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-20 23:40:51,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:40:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677564083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:51,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:40:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-20 23:40:51,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622154630] [2021-11-20 23:40:51,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:51,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:40:51,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:40:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:40:51,542 INFO L87 Difference]: Start difference. First operand 21074 states and 29397 transitions. Second operand has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-20 23:40:54,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:57,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:59,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:01,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:04,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:06,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:08,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:19,068 INFO L93 Difference]: Finished difference Result 43655 states and 61396 transitions. [2021-11-20 23:41:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:41:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) Word has length 272 [2021-11-20 23:41:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:19,175 INFO L225 Difference]: With dead ends: 43655 [2021-11-20 23:41:19,176 INFO L226 Difference]: Without dead ends: 22589 [2021-11-20 23:41:19,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:41:19,229 INFO L933 BasicCegarLoop]: 2854 mSDtfsCounter, 311 mSDsluCounter, 32059 mSDsCounter, 0 mSdLazyCounter, 5025 mSolverCounterSat, 133 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 30941 SdHoareTripleChecker+Invalid, 5162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 5025 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:19,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 30941 Invalid, 5162 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 5025 Invalid, 4 Unknown, 0 Unchecked, 25.7s Time] [2021-11-20 23:41:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22589 states. [2021-11-20 23:41:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22589 to 21122. [2021-11-20 23:41:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21122 states, 11903 states have (on average 1.2492648912038982) internal successors, (14870), 12642 states have internal predecessors, (14870), 6983 states have call successors, (6983), 2377 states have call predecessors, (6983), 2233 states have return successors, (7608), 6635 states have call predecessors, (7608), 6974 states have call successors, (7608) [2021-11-20 23:41:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21122 states to 21122 states and 29461 transitions. [2021-11-20 23:41:20,655 INFO L78 Accepts]: Start accepts. Automaton has 21122 states and 29461 transitions. Word has length 272 [2021-11-20 23:41:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:20,656 INFO L470 AbstractCegarLoop]: Abstraction has 21122 states and 29461 transitions. [2021-11-20 23:41:20,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 15.125) internal successors, (121), 10 states have internal predecessors, (121), 5 states have call successors, (57), 2 states have call predecessors, (57), 5 states have return successors, (44), 6 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-20 23:41:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21122 states and 29461 transitions. [2021-11-20 23:41:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-20 23:41:20,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:20,672 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 11, 11, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:20,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 23:41:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 23:41:20,873 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:41:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -692687986, now seen corresponding path program 1 times [2021-11-20 23:41:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:20,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107464234] [2021-11-20 23:41:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:20,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2021-11-20 23:41:21,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107464234] [2021-11-20 23:41:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107464234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:21,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:21,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:41:21,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172780768] [2021-11-20 23:41:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:21,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:41:21,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:41:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:41:21,308 INFO L87 Difference]: Start difference. First operand 21122 states and 29461 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-20 23:41:23,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:26,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:28,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:30,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:35,509 INFO L93 Difference]: Finished difference Result 21147 states and 29483 transitions. [2021-11-20 23:41:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:41:35,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 302 [2021-11-20 23:41:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:35,573 INFO L225 Difference]: With dead ends: 21147 [2021-11-20 23:41:35,573 INFO L226 Difference]: Without dead ends: 21009 [2021-11-20 23:41:35,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:41:35,584 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 2990 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 253 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3115 SdHoareTripleChecker+Valid, 8209 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:35,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3115 Valid, 8209 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2347 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2021-11-20 23:41:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21009 states. [2021-11-20 23:41:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21009 to 20944. [2021-11-20 23:41:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20944 states, 11801 states have (on average 1.2504872468434878) internal successors, (14757), 12536 states have internal predecessors, (14757), 6935 states have call successors, (6935), 2347 states have call predecessors, (6935), 2205 states have return successors, (7566), 6593 states have call predecessors, (7566), 6932 states have call successors, (7566) [2021-11-20 23:41:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20944 states to 20944 states and 29258 transitions. [2021-11-20 23:41:37,297 INFO L78 Accepts]: Start accepts. Automaton has 20944 states and 29258 transitions. Word has length 302 [2021-11-20 23:41:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:37,298 INFO L470 AbstractCegarLoop]: Abstraction has 20944 states and 29258 transitions. [2021-11-20 23:41:37,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-20 23:41:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 20944 states and 29258 transitions. [2021-11-20 23:41:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-20 23:41:37,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:37,312 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 23:41:37,312 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:41:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 75430289, now seen corresponding path program 1 times [2021-11-20 23:41:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837490045] [2021-11-20 23:41:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:37,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-20 23:41:37,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837490045] [2021-11-20 23:41:37,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837490045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:37,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:37,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:41:37,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039820925] [2021-11-20 23:41:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:37,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:41:37,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:41:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:41:37,666 INFO L87 Difference]: Start difference. First operand 20944 states and 29258 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-20 23:41:41,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:42,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:44,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:45,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:47,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:53,974 INFO L93 Difference]: Finished difference Result 42837 states and 60193 transitions. [2021-11-20 23:41:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:41:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) Word has length 313 [2021-11-20 23:41:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:54,061 INFO L225 Difference]: With dead ends: 42837 [2021-11-20 23:41:54,061 INFO L226 Difference]: Without dead ends: 21909 [2021-11-20 23:41:54,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:41:54,128 INFO L933 BasicCegarLoop]: 2853 mSDtfsCounter, 387 mSDsluCounter, 12468 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 13814 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:54,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 13814 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1944 Invalid, 3 Unknown, 0 Unchecked, 15.0s Time] [2021-11-20 23:41:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21909 states. [2021-11-20 23:41:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21909 to 20639. [2021-11-20 23:41:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 11615 states have (on average 1.2495049504950495) internal successors, (14513), 12330 states have internal predecessors, (14513), 6831 states have call successors, (6831), 2331 states have call predecessors, (6831), 2190 states have return successors, (7431), 6496 states have call predecessors, (7431), 6828 states have call successors, (7431) [2021-11-20 23:41:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 28775 transitions. [2021-11-20 23:41:55,503 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 28775 transitions. Word has length 313 [2021-11-20 23:41:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:55,504 INFO L470 AbstractCegarLoop]: Abstraction has 20639 states and 28775 transitions. [2021-11-20 23:41:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2021-11-20 23:41:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 28775 transitions. [2021-11-20 23:41:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-20 23:41:55,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:55,515 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:41:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 23:41:55,516 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:41:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1413754677, now seen corresponding path program 1 times [2021-11-20 23:41:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519794761] [2021-11-20 23:41:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:55,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-11-20 23:41:55,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519794761] [2021-11-20 23:41:55,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519794761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:55,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:41:55,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818255595] [2021-11-20 23:41:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:55,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:55,817 INFO L87 Difference]: Start difference. First operand 20639 states and 28775 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-20 23:41:58,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:02,755 INFO L93 Difference]: Finished difference Result 41231 states and 57522 transitions. [2021-11-20 23:42:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:42:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 321 [2021-11-20 23:42:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:02,818 INFO L225 Difference]: With dead ends: 41231 [2021-11-20 23:42:02,819 INFO L226 Difference]: Without dead ends: 20608 [2021-11-20 23:42:02,867 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 23:42:02,868 INFO L933 BasicCegarLoop]: 2639 mSDtfsCounter, 8 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5269 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:02,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 5269 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 742 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-20 23:42:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20608 states. [2021-11-20 23:42:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20608 to 20598. [2021-11-20 23:42:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20598 states, 11593 states have (on average 1.2492883636677306) internal successors, (14483), 12305 states have internal predecessors, (14483), 6818 states have call successors, (6818), 2323 states have call predecessors, (6818), 2184 states have return successors, (7415), 6487 states have call predecessors, (7415), 6815 states have call successors, (7415) [2021-11-20 23:42:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20598 states to 20598 states and 28716 transitions. [2021-11-20 23:42:04,176 INFO L78 Accepts]: Start accepts. Automaton has 20598 states and 28716 transitions. Word has length 321 [2021-11-20 23:42:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 20598 states and 28716 transitions. [2021-11-20 23:42:04,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-20 23:42:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20598 states and 28716 transitions. [2021-11-20 23:42:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-20 23:42:04,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:04,188 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 23:42:04,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 23:42:04,189 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:42:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1543144802, now seen corresponding path program 1 times [2021-11-20 23:42:04,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001665356] [2021-11-20 23:42:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:04,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-20 23:42:06,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001665356] [2021-11-20 23:42:06,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001665356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:42:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874791131] [2021-11-20 23:42:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:06,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:42:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:42:06,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:42:06,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:42:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 6809 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:42:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:42:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-20 23:42:08,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:42:08,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874791131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:42:08,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:42:08,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2021-11-20 23:42:08,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913392523] [2021-11-20 23:42:08,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:42:08,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:42:08,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:42:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:42:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:42:08,657 INFO L87 Difference]: Start difference. First operand 20598 states and 28716 transitions. Second operand has 9 states, 6 states have (on average 25.5) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (69), 2 states have call predecessors, (69), 5 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-20 23:42:11,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:14,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:16,037 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:18,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:20,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:22,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:25,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:33,384 INFO L93 Difference]: Finished difference Result 33146 states and 46308 transitions. [2021-11-20 23:42:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:42:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 25.5) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (69), 2 states have call predecessors, (69), 5 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) Word has length 338 [2021-11-20 23:42:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:33,452 INFO L225 Difference]: With dead ends: 33146 [2021-11-20 23:42:33,452 INFO L226 Difference]: Without dead ends: 20734 [2021-11-20 23:42:33,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:42:33,486 INFO L933 BasicCegarLoop]: 2626 mSDtfsCounter, 17 mSDsluCounter, 20860 mSDsCounter, 0 mSdLazyCounter, 3313 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20909 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3313 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:33,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20909 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3313 Invalid, 7 Unknown, 0 Unchecked, 23.5s Time] [2021-11-20 23:42:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20734 states. [2021-11-20 23:42:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20734 to 20662. [2021-11-20 23:42:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 11633 states have (on average 1.248775036533998) internal successors, (14527), 12337 states have internal predecessors, (14527), 6842 states have call successors, (6842), 2323 states have call predecessors, (6842), 2184 states have return successors, (7439), 6511 states have call predecessors, (7439), 6839 states have call successors, (7439) [2021-11-20 23:42:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 28808 transitions. [2021-11-20 23:42:34,770 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 28808 transitions. Word has length 338 [2021-11-20 23:42:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 20662 states and 28808 transitions. [2021-11-20 23:42:34,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 25.5) internal successors, (153), 9 states have internal predecessors, (153), 5 states have call successors, (69), 2 states have call predecessors, (69), 5 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-20 23:42:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 28808 transitions. [2021-11-20 23:42:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-20 23:42:34,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:34,779 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 23:42:34,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:42:34,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 23:42:34,980 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:42:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 160591541, now seen corresponding path program 1 times [2021-11-20 23:42:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543837515] [2021-11-20 23:42:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:34,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-11-20 23:42:37,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543837515] [2021-11-20 23:42:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543837515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:42:37,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948364246] [2021-11-20 23:42:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:37,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:42:37,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:42:37,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:42:37,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_792d2c8a-2bf8-4dcc-ab4e-e6238bf36f10/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:42:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 6897 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 23:42:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:42:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 150 proven. 8 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-11-20 23:42:40,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:42:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-20 23:42:42,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948364246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:42:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857762937] [2021-11-20 23:42:42,176 INFO L159 IcfgInterpreter]: Started Sifa with 244 locations of interest [2021-11-20 23:42:42,176 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:42:42,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:42:42,190 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:42:42,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs