./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/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_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:41:38,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:41:38,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:41:38,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:41:38,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:41:38,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:41:38,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:41:38,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:41:38,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:41:38,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:41:38,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:41:38,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:41:38,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:41:38,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:41:38,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:41:38,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:41:38,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:41:38,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:41:38,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:41:38,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:41:38,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:41:38,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:41:38,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:41:38,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:41:38,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:41:38,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:41:38,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:41:38,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:41:38,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:41:38,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:41:38,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:41:38,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:41:38,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:41:38,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:41:38,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:41:38,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:41:38,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:41:38,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:41:38,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:41:38,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:41:38,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:41:38,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:41:38,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:41:38,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:41:38,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:41:38,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:41:38,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:41:38,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:41:38,582 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:41:38,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:41:38,583 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:41:38,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:41:38,584 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:41:38,584 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:41:38,585 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:41:38,585 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:41:38,585 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:41:38,585 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:41:38,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:41:38,586 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:41:38,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:41:38,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:41:38,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:41:38,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:41:38,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:41:38,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:41:38,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:41:38,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:41:38,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:41:38,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:41:38,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:41:38,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:38,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:41:38,590 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:41:38,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:41:38,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:41:38,591 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:41:38,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:41:38,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:41:38,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:41:38,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d46a0c21917156d86326b49faaf0b679a3e4aece26c641cfed6d2cba03552492 [2022-11-23 14:41:38,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:41:38,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:41:38,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:41:38,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:41:38,933 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:41:38,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2022-11-23 14:41:42,066 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:41:42,833 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:41:42,834 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2022-11-23 14:41:42,943 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/data/3258c6676/c1f7ecf6b062442e9ac1b7e3b72281dc/FLAG14a5495e3 [2022-11-23 14:41:42,963 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/data/3258c6676/c1f7ecf6b062442e9ac1b7e3b72281dc [2022-11-23 14:41:42,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:41:42,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:41:42,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:42,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:41:42,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:41:42,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:42" (1/1) ... [2022-11-23 14:41:42,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20efb8cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:42, skipping insertion in model container [2022-11-23 14:41:42,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:42" (1/1) ... [2022-11-23 14:41:43,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:41:43,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:41:47,427 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2022-11-23 14:41:47,431 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2022-11-23 14:41:47,432 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2022-11-23 14:41:47,433 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2022-11-23 14:41:47,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:47,563 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:41:48,190 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450587,450600] [2022-11-23 14:41:48,191 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450756,450769] [2022-11-23 14:41:48,192 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[450923,450936] [2022-11-23 14:41:48,192 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i[451091,451104] [2022-11-23 14:41:48,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:41:48,488 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:41:48,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48 WrapperNode [2022-11-23 14:41:48,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:41:48,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:48,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:41:48,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:41:48,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:48,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:48,997 INFO L138 Inliner]: procedures = 547, calls = 4350, calls flagged for inlining = 248, calls inlined = 226, statements flattened = 8732 [2022-11-23 14:41:48,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:41:48,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:41:48,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:41:49,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:41:49,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:41:49,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:41:49,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:41:49,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:41:49,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (1/1) ... [2022-11-23 14:41:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:41:49,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:49,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:41:49,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:41:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-23 14:41:49,600 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-23 14:41:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 14:41:49,600 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 14:41:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-23 14:41:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-23 14:41:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-23 14:41:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-23 14:41:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_nway_reset [2022-11-23 14:41:49,602 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_nway_reset [2022-11-23 14:41:49,602 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 14:41:49,602 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 14:41:49,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_87 [2022-11-23 14:41:49,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_87 [2022-11-23 14:41:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:41:49,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:41:49,603 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-23 14:41:49,604 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-23 14:41:49,604 INFO L130 BoogieDeclarations]: Found specification of procedure set_8021q_mode [2022-11-23 14:41:49,605 INFO L138 BoogieDeclarations]: Found implementation of procedure set_8021q_mode [2022-11-23 14:41:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_82 [2022-11-23 14:41:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_82 [2022-11-23 14:41:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_remove_one [2022-11-23 14:41:49,607 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_remove_one [2022-11-23 14:41:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:41:49,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:41:49,607 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-23 14:41:49,608 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-23 14:41:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure issue_and_wait [2022-11-23 14:41:49,608 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_and_wait [2022-11-23 14:41:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 14:41:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 14:41:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2022-11-23 14:41:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2022-11-23 14:41:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2022-11-23 14:41:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2022-11-23 14:41:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure window_write32 [2022-11-23 14:41:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write32 [2022-11-23 14:41:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2022-11-23 14:41:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2022-11-23 14:41:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_65 [2022-11-23 14:41:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_65 [2022-11-23 14:41:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-23 14:41:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-23 14:41:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_5 [2022-11-23 14:41:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_5 [2022-11-23 14:41:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 14:41:49,613 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 14:41:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_window_lock_of_vortex_private [2022-11-23 14:41:49,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_window_lock_of_vortex_private [2022-11-23 14:41:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_vortex_private [2022-11-23 14:41:49,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_vortex_private [2022-11-23 14:41:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure window_set [2022-11-23 14:41:49,614 INFO L138 BoogieDeclarations]: Found implementation of procedure window_set [2022-11-23 14:41:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-23 14:41:49,615 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-23 14:41:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 14:41:49,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 14:41:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-23 14:41:49,616 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-23 14:41:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2022-11-23 14:41:49,616 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2022-11-23 14:41:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-23 14:41:49,616 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-23 14:41:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-23 14:41:49,617 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-23 14:41:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-23 14:41:49,617 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-23 14:41:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 14:41:49,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 14:41:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2022-11-23 14:41:49,619 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2022-11-23 14:41:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 14:41:49,619 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 14:41:49,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_5_2 [2022-11-23 14:41:49,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_5_2 [2022-11-23 14:41:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-23 14:41:49,621 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-23 14:41:49,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:41:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tx_timestamp [2022-11-23 14:41:49,622 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tx_timestamp [2022-11-23 14:41:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2022-11-23 14:41:49,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2022-11-23 14:41:49,622 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 14:41:49,623 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 14:41:49,623 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 14:41:49,624 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 14:41:49,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:41:49,624 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_tx_timeout [2022-11-23 14:41:49,624 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_tx_timeout [2022-11-23 14:41:49,625 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2022-11-23 14:41:49,625 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2022-11-23 14:41:49,625 INFO L130 BoogieDeclarations]: Found specification of procedure ioport_map [2022-11-23 14:41:49,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ioport_map [2022-11-23 14:41:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 14:41:49,626 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 14:41:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2022-11-23 14:41:49,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2022-11-23 14:41:49,626 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 14:41:49,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 14:41:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:41:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 14:41:49,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 14:41:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:41:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_interrupt [2022-11-23 14:41:49,628 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_interrupt [2022-11-23 14:41:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-23 14:41:49,628 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-23 14:41:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-23 14:41:49,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-23 14:41:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:41:49,629 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:41:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-23 14:41:49,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-23 14:41:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-23 14:41:49,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-23 14:41:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-23 14:41:49,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-23 14:41:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_set_duplex [2022-11-23 14:41:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_set_duplex [2022-11-23 14:41:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_83 [2022-11-23 14:41:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_83 [2022-11-23 14:41:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2022-11-23 14:41:49,632 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2022-11-23 14:41:49,632 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2022-11-23 14:41:49,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2022-11-23 14:41:49,632 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-23 14:41:49,632 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-23 14:41:49,633 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_error [2022-11-23 14:41:49,633 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_error [2022-11-23 14:41:49,633 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-23 14:41:49,633 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-23 14:41:49,633 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_close [2022-11-23 14:41:49,634 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_close [2022-11-23 14:41:49,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:41:49,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:41:49,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:41:49,634 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2022-11-23 14:41:49,635 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2022-11-23 14:41:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-23 14:41:49,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-23 14:41:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:41:49,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 14:41:49,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 14:41:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 14:41:49,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 14:41:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:41:49,636 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2022-11-23 14:41:49,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2022-11-23 14:41:49,637 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:41:49,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:41:49,637 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-23 14:41:49,637 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-23 14:41:49,637 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:41:49,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:41:49,638 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_98 [2022-11-23 14:41:49,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_98 [2022-11-23 14:41:49,638 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_set_WOL [2022-11-23 14:41:49,638 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_set_WOL [2022-11-23 14:41:49,638 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 14:41:49,639 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 14:41:49,639 INFO L130 BoogieDeclarations]: Found specification of procedure window_write16 [2022-11-23 14:41:49,639 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write16 [2022-11-23 14:41:49,639 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2022-11-23 14:41:49,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2022-11-23 14:41:49,640 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-23 14:41:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-23 14:41:49,640 INFO L130 BoogieDeclarations]: Found specification of procedure window_read8 [2022-11-23 14:41:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read8 [2022-11-23 14:41:49,640 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-23 14:41:49,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-23 14:41:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-23 14:41:49,641 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-23 14:41:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 14:41:49,641 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 14:41:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-23 14:41:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-23 14:41:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure poll_vortex [2022-11-23 14:41:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_vortex [2022-11-23 14:41:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 14:41:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 14:41:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_window_lock_of_vortex_private [2022-11-23 14:41:49,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_window_lock_of_vortex_private [2022-11-23 14:41:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_check_media [2022-11-23 14:41:49,643 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_check_media [2022-11-23 14:41:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-11-23 14:41:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-11-23 14:41:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-23 14:41:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-23 14:41:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_rx [2022-11-23 14:41:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_rx [2022-11-23 14:41:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_save_flags [2022-11-23 14:41:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_save_flags [2022-11-23 14:41:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_open [2022-11-23 14:41:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_open [2022-11-23 14:41:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure dump_tx_ring [2022-11-23 14:41:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_tx_ring [2022-11-23 14:41:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-23 14:41:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-23 14:41:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:41:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:41:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_probe1 [2022-11-23 14:41:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_probe1 [2022-11-23 14:41:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:41:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:41:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:41:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:41:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:41:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:41:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-23 14:41:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-23 14:41:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2022-11-23 14:41:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2022-11-23 14:41:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-23 14:41:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-23 14:41:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 14:41:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 14:41:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2022-11-23 14:41:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2022-11-23 14:41:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 14:41:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 14:41:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-23 14:41:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-23 14:41:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:41:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-23 14:41:49,651 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-23 14:41:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-23 14:41:49,651 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-23 14:41:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:41:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_suspend [2022-11-23 14:41:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_suspend [2022-11-23 14:41:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure boomerang_interrupt [2022-11-23 14:41:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure boomerang_interrupt [2022-11-23 14:41:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_81 [2022-11-23 14:41:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_81 [2022-11-23 14:41:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:41:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-23 14:41:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-23 14:41:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure rx_oom_timer [2022-11-23 14:41:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_oom_timer [2022-11-23 14:41:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2022-11-23 14:41:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2022-11-23 14:41:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 14:41:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 14:41:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 14:41:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 14:41:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2022-11-23 14:41:49,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2022-11-23 14:41:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_108 [2022-11-23 14:41:49,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_108 [2022-11-23 14:41:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-23 14:41:49,655 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-23 14:41:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2022-11-23 14:41:49,656 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2022-11-23 14:41:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_89 [2022-11-23 14:41:49,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_89 [2022-11-23 14:41:49,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_88 [2022-11-23 14:41:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_88 [2022-11-23 14:41:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_resume [2022-11-23 14:41:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_resume [2022-11-23 14:41:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2022-11-23 14:41:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2022-11-23 14:41:49,657 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-23 14:41:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-23 14:41:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_rx [2022-11-23 14:41:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_rx [2022-11-23 14:41:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 14:41:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 14:41:49,658 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 14:41:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 14:41:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-23 14:41:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-23 14:41:49,659 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 14:41:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 14:41:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_delay [2022-11-23 14:41:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_delay [2022-11-23 14:41:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_timer [2022-11-23 14:41:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_timer [2022-11-23 14:41:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:41:49,660 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_down [2022-11-23 14:41:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_down [2022-11-23 14:41:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure eth_type_trans [2022-11-23 14:41:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_type_trans [2022-11-23 14:41:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-23 14:41:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-23 14:41:49,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:41:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:41:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure window_write8 [2022-11-23 14:41:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure window_write8 [2022-11-23 14:41:49,662 INFO L130 BoogieDeclarations]: Found specification of procedure window_read32 [2022-11-23 14:41:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read32 [2022-11-23 14:41:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_10_2 [2022-11-23 14:41:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_10_2 [2022-11-23 14:41:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2022-11-23 14:41:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2022-11-23 14:41:49,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_109 [2022-11-23 14:41:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_109 [2022-11-23 14:41:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_94 [2022-11-23 14:41:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_94 [2022-11-23 14:41:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32_rep [2022-11-23 14:41:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32_rep [2022-11-23 14:41:49,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_90 [2022-11-23 14:41:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_90 [2022-11-23 14:41:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2022-11-23 14:41:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2022-11-23 14:41:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure vortex_up [2022-11-23 14:41:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure vortex_up [2022-11-23 14:41:49,665 INFO L130 BoogieDeclarations]: Found specification of procedure window_read16 [2022-11-23 14:41:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure window_read16 [2022-11-23 14:41:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 14:41:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 14:41:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-23 14:41:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-23 14:41:49,666 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-23 14:41:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-23 14:41:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2022-11-23 14:41:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2022-11-23 14:41:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_vortex_private [2022-11-23 14:41:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_vortex_private [2022-11-23 14:41:49,667 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 14:41:49,668 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 14:41:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:41:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 14:41:49,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 14:41:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-23 14:41:49,668 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-23 14:41:50,983 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:41:50,992 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:41:53,368 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:42:00,356 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:42:03,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:42:03,791 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 14:42:03,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:03 BoogieIcfgContainer [2022-11-23 14:42:03,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:42:03,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:42:03,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:42:03,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:42:03,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:41:42" (1/3) ... [2022-11-23 14:42:03,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388ca9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:03, skipping insertion in model container [2022-11-23 14:42:03,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:48" (2/3) ... [2022-11-23 14:42:03,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388ca9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:03, skipping insertion in model container [2022-11-23 14:42:03,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:03" (3/3) ... [2022-11-23 14:42:03,813 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-3com-3c59x.cil.i [2022-11-23 14:42:03,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:42:03,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 14:42:03,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:42:03,966 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42d57645, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:42:03,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 14:42:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 2100 states, 1184 states have (on average 1.304054054054054) internal successors, (1544), 1272 states have internal predecessors, (1544), 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) [2022-11-23 14:42:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:42:03,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:03,998 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:42:03,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:42:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash -285944674, now seen corresponding path program 1 times [2022-11-23 14:42:04,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:04,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385568029] [2022-11-23 14:42:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:05,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385568029] [2022-11-23 14:42:05,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385568029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:05,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988148282] [2022-11-23 14:42:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:05,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:05,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:06,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:06,009 INFO L87 Difference]: Start difference. First operand has 2100 states, 1184 states have (on average 1.304054054054054) internal successors, (1544), 1272 states have internal predecessors, (1544), 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) [2022-11-23 14:42:08,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:10,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:16,885 INFO L93 Difference]: Finished difference Result 5508 states and 8316 transitions. [2022-11-23 14:42:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:16,893 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 [2022-11-23 14:42:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:16,950 INFO L225 Difference]: With dead ends: 5508 [2022-11-23 14:42:16,951 INFO L226 Difference]: Without dead ends: 3414 [2022-11-23 14:42:16,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:42:16,985 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 2520 mSDsluCounter, 8617 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2536 SdHoareTripleChecker+Valid, 11893 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:16,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2536 Valid, 11893 Invalid, 1505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1503 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2022-11-23 14:42:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2022-11-23 14:42:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 3407. [2022-11-23 14:42:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 1903 states have (on average 1.2869153967419864) internal successors, (2449), 2039 states have internal predecessors, (2449), 1222 states have call successors, (1222), 280 states have call predecessors, (1222), 279 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2022-11-23 14:42:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4890 transitions. [2022-11-23 14:42:17,360 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4890 transitions. Word has length 37 [2022-11-23 14:42:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:17,361 INFO L495 AbstractCegarLoop]: Abstraction has 3407 states and 4890 transitions. [2022-11-23 14:42:17,361 INFO L496 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) [2022-11-23 14:42:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4890 transitions. [2022-11-23 14:42:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:42:17,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:17,370 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:42:17,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:42:17,371 INFO L420 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)] === [2022-11-23 14:42:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:17,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1800038699, now seen corresponding path program 1 times [2022-11-23 14:42:17,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:17,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472391967] [2022-11-23 14:42:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:17,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:18,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:18,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472391967] [2022-11-23 14:42:18,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472391967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:18,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:18,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427782748] [2022-11-23 14:42:18,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:18,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:18,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:18,627 INFO L87 Difference]: Start difference. First operand 3407 states and 4890 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) [2022-11-23 14:42:20,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:23,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:27,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:30,200 INFO L93 Difference]: Finished difference Result 3420 states and 4901 transitions. [2022-11-23 14:42:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:30,203 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 [2022-11-23 14:42:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:30,228 INFO L225 Difference]: With dead ends: 3420 [2022-11-23 14:42:30,228 INFO L226 Difference]: Without dead ends: 3418 [2022-11-23 14:42:30,232 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:42:30,233 INFO L413 NwaCegarLoop]: 3260 mSDtfsCounter, 2499 mSDsluCounter, 8574 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 11834 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:30,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2513 Valid, 11834 Invalid, 1502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1499 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 14:42:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2022-11-23 14:42:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3411. [2022-11-23 14:42:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 1906 states have (on average 1.2864637985309548) internal successors, (2452), 2042 states have internal predecessors, (2452), 1222 states have call successors, (1222), 281 states have call predecessors, (1222), 280 states have return successors, (1219), 1191 states have call predecessors, (1219), 1219 states have call successors, (1219) [2022-11-23 14:42:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 4893 transitions. [2022-11-23 14:42:30,526 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 4893 transitions. Word has length 42 [2022-11-23 14:42:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:30,527 INFO L495 AbstractCegarLoop]: Abstraction has 3411 states and 4893 transitions. [2022-11-23 14:42:30,527 INFO L496 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) [2022-11-23 14:42:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 4893 transitions. [2022-11-23 14:42:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:42:30,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:30,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:30,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:42:30,536 INFO L420 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)] === [2022-11-23 14:42:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash -250235202, now seen corresponding path program 1 times [2022-11-23 14:42:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214877295] [2022-11-23 14:42:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:42:31,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214877295] [2022-11-23 14:42:31,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214877295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:31,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:31,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:31,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915541458] [2022-11-23 14:42:31,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:31,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:31,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:31,559 INFO L87 Difference]: Start difference. First operand 3411 states and 4893 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:33,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:35,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:37,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:39,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:46,218 INFO L93 Difference]: Finished difference Result 3447 states and 4924 transitions. [2022-11-23 14:42:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2022-11-23 14:42:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:46,247 INFO L225 Difference]: With dead ends: 3447 [2022-11-23 14:42:46,248 INFO L226 Difference]: Without dead ends: 3445 [2022-11-23 14:42:46,251 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:42:46,256 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 2552 mSDsluCounter, 8497 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 11738 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:46,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 11738 Invalid, 1479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-11-23 14:42:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2022-11-23 14:42:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 3437. [2022-11-23 14:42:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 1920 states have (on average 1.284375) internal successors, (2466), 2057 states have internal predecessors, (2466), 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) [2022-11-23 14:42:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4915 transitions. [2022-11-23 14:42:46,492 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4915 transitions. Word has length 47 [2022-11-23 14:42:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:46,493 INFO L495 AbstractCegarLoop]: Abstraction has 3437 states and 4915 transitions. [2022-11-23 14:42:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4915 transitions. [2022-11-23 14:42:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:42:46,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:46,495 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:46,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:42:46,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:42:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 33578420, now seen corresponding path program 1 times [2022-11-23 14:42:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:46,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835184214] [2022-11-23 14:42:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:46,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:42:47,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:47,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835184214] [2022-11-23 14:42:47,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835184214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:47,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:47,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:47,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385250004] [2022-11-23 14:42:47,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:47,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:47,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:47,318 INFO L87 Difference]: Start difference. First operand 3437 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, (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) [2022-11-23 14:42:49,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:51,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:58,071 INFO L93 Difference]: Finished difference Result 3450 states and 4926 transitions. [2022-11-23 14:42:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:42:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-11-23 14:42:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:58,096 INFO L225 Difference]: With dead ends: 3450 [2022-11-23 14:42:58,097 INFO L226 Difference]: Without dead ends: 3448 [2022-11-23 14:42:58,100 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:42:58,100 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 2493 mSDsluCounter, 8532 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 11771 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:58,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2505 Valid, 11771 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1481 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2022-11-23 14:42:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-11-23 14:42:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3441. [2022-11-23 14:42:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 1923 states have (on average 1.28393135725429) internal successors, (2469), 2060 states have internal predecessors, (2469), 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) [2022-11-23 14:42:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 4918 transitions. [2022-11-23 14:42:58,313 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 4918 transitions. Word has length 60 [2022-11-23 14:42:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:58,314 INFO L495 AbstractCegarLoop]: Abstraction has 3441 states and 4918 transitions. [2022-11-23 14:42:58,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:42:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 4918 transitions. [2022-11-23 14:42:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:42:58,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:58,317 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:58,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:42:58,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:42:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1638296897, now seen corresponding path program 1 times [2022-11-23 14:42:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872273031] [2022-11-23 14:42:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:42:59,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872273031] [2022-11-23 14:42:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872273031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:59,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:59,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251654146] [2022-11-23 14:42:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:59,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:59,220 INFO L87 Difference]: Start difference. First operand 3441 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, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:43:01,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:03,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:08,726 INFO L93 Difference]: Finished difference Result 3454 states and 4929 transitions. [2022-11-23 14:43:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:43:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2022-11-23 14:43:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:08,751 INFO L225 Difference]: With dead ends: 3454 [2022-11-23 14:43:08,752 INFO L226 Difference]: Without dead ends: 3452 [2022-11-23 14:43:08,755 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:43:08,755 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 2493 mSDsluCounter, 8532 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 11771 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:08,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2504 Valid, 11771 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1481 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2022-11-23 14:43:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-11-23 14:43:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 3445. [2022-11-23 14:43:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 1926 states have (on average 1.2834890965732086) internal successors, (2472), 2063 states have internal predecessors, (2472), 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) [2022-11-23 14:43:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4921 transitions. [2022-11-23 14:43:09,079 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4921 transitions. Word has length 65 [2022-11-23 14:43:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:09,079 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 4921 transitions. [2022-11-23 14:43:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:43:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4921 transitions. [2022-11-23 14:43:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 14:43:09,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:09,085 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:09,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:43:09,086 INFO L420 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)] === [2022-11-23 14:43:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1207456149, now seen corresponding path program 1 times [2022-11-23 14:43:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077883534] [2022-11-23 14:43:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:09,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:43:09,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077883534] [2022-11-23 14:43:09,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077883534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:09,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:09,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:43:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210815982] [2022-11-23 14:43:09,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:09,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:43:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:43:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:43:09,891 INFO L87 Difference]: Start difference. First operand 3445 states and 4921 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:43:12,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:14,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:19,914 INFO L93 Difference]: Finished difference Result 3458 states and 4932 transitions. [2022-11-23 14:43:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:43:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 62 [2022-11-23 14:43:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:19,937 INFO L225 Difference]: With dead ends: 3458 [2022-11-23 14:43:19,938 INFO L226 Difference]: Without dead ends: 3456 [2022-11-23 14:43:19,940 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:43:19,941 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 2499 mSDsluCounter, 8532 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 11771 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:19,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2509 Valid, 11771 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1481 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2022-11-23 14:43:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2022-11-23 14:43:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 3449. [2022-11-23 14:43:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 1929 states have (on average 1.2830482115085537) internal successors, (2475), 2066 states have internal predecessors, (2475), 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) [2022-11-23 14:43:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4924 transitions. [2022-11-23 14:43:20,173 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4924 transitions. Word has length 62 [2022-11-23 14:43:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:20,174 INFO L495 AbstractCegarLoop]: Abstraction has 3449 states and 4924 transitions. [2022-11-23 14:43:20,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:43:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4924 transitions. [2022-11-23 14:43:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 14:43:20,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:20,176 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:43:20,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:43:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1534192898, now seen corresponding path program 1 times [2022-11-23 14:43:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:20,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375378359] [2022-11-23 14:43:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 14:43:20,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:20,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375378359] [2022-11-23 14:43:20,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375378359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:20,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:20,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:43:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199742772] [2022-11-23 14:43:20,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:43:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:43:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:43:20,964 INFO L87 Difference]: Start difference. First operand 3449 states and 4924 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:43:23,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:26,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:28,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:35,927 INFO L93 Difference]: Finished difference Result 6180 states and 8808 transitions. [2022-11-23 14:43:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:43:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2022-11-23 14:43:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:35,981 INFO L225 Difference]: With dead ends: 6180 [2022-11-23 14:43:35,982 INFO L226 Difference]: Without dead ends: 6178 [2022-11-23 14:43:35,987 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:43:35,988 INFO L413 NwaCegarLoop]: 3964 mSDtfsCounter, 2497 mSDsluCounter, 10487 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 14451 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:35,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2504 Valid, 14451 Invalid, 1919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1913 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2022-11-23 14:43:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6178 states. [2022-11-23 14:43:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6178 to 6167. [2022-11-23 14:43:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6167 states, 3454 states have (on average 1.2779386218876665) internal successors, (4414), 3700 states have internal predecessors, (4414), 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) [2022-11-23 14:43:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6167 states to 6167 states and 8798 transitions. [2022-11-23 14:43:36,547 INFO L78 Accepts]: Start accepts. Automaton has 6167 states and 8798 transitions. Word has length 67 [2022-11-23 14:43:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:36,548 INFO L495 AbstractCegarLoop]: Abstraction has 6167 states and 8798 transitions. [2022-11-23 14:43:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:43:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6167 states and 8798 transitions. [2022-11-23 14:43:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:43:36,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:36,551 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:43:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:43:36,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:43:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -407706891, now seen corresponding path program 1 times [2022-11-23 14:43:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271540550] [2022-11-23 14:43:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 14:43:37,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271540550] [2022-11-23 14:43:37,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271540550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:37,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:37,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:43:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831822976] [2022-11-23 14:43:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:37,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:43:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:43:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:43:37,255 INFO L87 Difference]: Start difference. First operand 6167 states and 8798 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) [2022-11-23 14:43:39,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:41,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:47,496 INFO L93 Difference]: Finished difference Result 6187 states and 8817 transitions. [2022-11-23 14:43:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:43:47,499 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 [2022-11-23 14:43:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:47,533 INFO L225 Difference]: With dead ends: 6187 [2022-11-23 14:43:47,533 INFO L226 Difference]: Without dead ends: 6185 [2022-11-23 14:43:47,538 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:43:47,539 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 2499 mSDsluCounter, 8532 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2507 SdHoareTripleChecker+Valid, 11771 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:47,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2507 Valid, 11771 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1481 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2022-11-23 14:43:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2022-11-23 14:43:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 6181. [2022-11-23 14:43:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 3464 states have (on average 1.2771362586605082) internal successors, (4424), 3712 states have internal predecessors, (4424), 2178 states have call successors, (2178), 556 states have call predecessors, (2178), 536 states have return successors, (2210), 2094 states have call predecessors, (2210), 2172 states have call successors, (2210) [2022-11-23 14:43:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 8812 transitions. [2022-11-23 14:43:48,119 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 8812 transitions. Word has length 72 [2022-11-23 14:43:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:48,121 INFO L495 AbstractCegarLoop]: Abstraction has 6181 states and 8812 transitions. [2022-11-23 14:43:48,121 INFO L496 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) [2022-11-23 14:43:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 8812 transitions. [2022-11-23 14:43:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:43:48,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:48,123 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:43:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:43:48,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:43:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash -607023842, now seen corresponding path program 1 times [2022-11-23 14:43:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:48,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176430889] [2022-11-23 14:43:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-23 14:43:48,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176430889] [2022-11-23 14:43:48,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176430889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:48,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:48,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:43:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657017353] [2022-11-23 14:43:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:48,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:43:48,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:43:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:43:48,803 INFO L87 Difference]: Start difference. First operand 6181 states and 8812 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) [2022-11-23 14:43:50,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:52,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:54,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:57,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:59,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:03,635 INFO L93 Difference]: Finished difference Result 6499 states and 9171 transitions. [2022-11-23 14:44:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:03,637 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 [2022-11-23 14:44:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:03,670 INFO L225 Difference]: With dead ends: 6499 [2022-11-23 14:44:03,670 INFO L226 Difference]: Without dead ends: 6497 [2022-11-23 14:44:03,675 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:03,676 INFO L413 NwaCegarLoop]: 2684 mSDtfsCounter, 2936 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2941 SdHoareTripleChecker+Valid, 8183 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:03,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2941 Valid, 8183 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1150 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-11-23 14:44:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2022-11-23 14:44:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 6493. [2022-11-23 14:44:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6493 states, 3619 states have (on average 1.2688588007736943) internal successors, (4592), 3868 states have internal predecessors, (4592), 2271 states have call successors, (2271), 620 states have call predecessors, (2271), 600 states have return successors, (2303), 2187 states have call predecessors, (2303), 2265 states have call successors, (2303) [2022-11-23 14:44:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 9166 transitions. [2022-11-23 14:44:04,256 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 9166 transitions. Word has length 77 [2022-11-23 14:44:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:04,256 INFO L495 AbstractCegarLoop]: Abstraction has 6493 states and 9166 transitions. [2022-11-23 14:44:04,257 INFO L496 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) [2022-11-23 14:44:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 9166 transitions. [2022-11-23 14:44:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:44:04,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:04,260 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:44:04,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:44:04,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:04,267 INFO L85 PathProgramCache]: Analyzing trace with hash 677440597, now seen corresponding path program 1 times [2022-11-23 14:44:04,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:04,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143010247] [2022-11-23 14:44:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:04,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:44:05,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143010247] [2022-11-23 14:44:05,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143010247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:05,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:05,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311423340] [2022-11-23 14:44:05,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:05,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:05,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:05,048 INFO L87 Difference]: Start difference. First operand 6493 states and 9166 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) [2022-11-23 14:44:07,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:09,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:15,451 INFO L93 Difference]: Finished difference Result 6507 states and 9177 transitions. [2022-11-23 14:44:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:15,454 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 [2022-11-23 14:44:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:15,486 INFO L225 Difference]: With dead ends: 6507 [2022-11-23 14:44:15,487 INFO L226 Difference]: Without dead ends: 6505 [2022-11-23 14:44:15,491 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:15,492 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 2499 mSDsluCounter, 8518 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 11750 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:15,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2505 Valid, 11750 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1478 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2022-11-23 14:44:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2022-11-23 14:44:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 6501. [2022-11-23 14:44:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6501 states, 3625 states have (on average 1.2684137931034483) internal successors, (4598), 3874 states have internal predecessors, (4598), 2271 states have call successors, (2271), 622 states have call predecessors, (2271), 602 states have return successors, (2303), 2187 states have call predecessors, (2303), 2265 states have call successors, (2303) [2022-11-23 14:44:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6501 states to 6501 states and 9172 transitions. [2022-11-23 14:44:16,020 INFO L78 Accepts]: Start accepts. Automaton has 6501 states and 9172 transitions. Word has length 82 [2022-11-23 14:44:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:16,021 INFO L495 AbstractCegarLoop]: Abstraction has 6501 states and 9172 transitions. [2022-11-23 14:44:16,021 INFO L496 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) [2022-11-23 14:44:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6501 states and 9172 transitions. [2022-11-23 14:44:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:44:16,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:16,025 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:16,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:44:16,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash -678654146, now seen corresponding path program 1 times [2022-11-23 14:44:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714439286] [2022-11-23 14:44:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-23 14:44:16,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714439286] [2022-11-23 14:44:16,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714439286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:16,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:16,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:16,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149104519] [2022-11-23 14:44:16,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:16,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:16,900 INFO L87 Difference]: Start difference. First operand 6501 states and 9172 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, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:44:19,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:21,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:26,443 INFO L93 Difference]: Finished difference Result 6515 states and 9183 transitions. [2022-11-23 14:44:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:26,445 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, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 87 [2022-11-23 14:44:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:26,474 INFO L225 Difference]: With dead ends: 6515 [2022-11-23 14:44:26,475 INFO L226 Difference]: Without dead ends: 6513 [2022-11-23 14:44:26,479 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:26,480 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 2499 mSDsluCounter, 8518 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 11750 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:26,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2504 Valid, 11750 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1478 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2022-11-23 14:44:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6513 states. [2022-11-23 14:44:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6513 to 6509. [2022-11-23 14:44:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 3631 states have (on average 1.2679702561277886) internal successors, (4604), 3880 states have internal predecessors, (4604), 2271 states have call successors, (2271), 624 states have call predecessors, (2271), 604 states have return successors, (2303), 2187 states have call predecessors, (2303), 2265 states have call successors, (2303) [2022-11-23 14:44:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 9178 transitions. [2022-11-23 14:44:27,044 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 9178 transitions. Word has length 87 [2022-11-23 14:44:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:27,045 INFO L495 AbstractCegarLoop]: Abstraction has 6509 states and 9178 transitions. [2022-11-23 14:44:27,045 INFO L496 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, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:44:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 9178 transitions. [2022-11-23 14:44:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 14:44:27,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:27,048 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:44:27,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:44:27,049 INFO L420 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)] === [2022-11-23 14:44:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -849836839, now seen corresponding path program 1 times [2022-11-23 14:44:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:27,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650569333] [2022-11-23 14:44:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:44:27,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650569333] [2022-11-23 14:44:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650569333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:27,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:44:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883838284] [2022-11-23 14:44:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:27,643 INFO L87 Difference]: Start difference. First operand 6509 states and 9178 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) [2022-11-23 14:44:30,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:32,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:35,870 INFO L93 Difference]: Finished difference Result 12856 states and 18095 transitions. [2022-11-23 14:44:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:35,872 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 [2022-11-23 14:44:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:35,907 INFO L225 Difference]: With dead ends: 12856 [2022-11-23 14:44:35,908 INFO L226 Difference]: Without dead ends: 6509 [2022-11-23 14:44:35,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:35,946 INFO L413 NwaCegarLoop]: 3172 mSDtfsCounter, 2563 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2564 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:35,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2564 Valid, 5208 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-23 14:44:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6509 states. [2022-11-23 14:44:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6509 to 6501. [2022-11-23 14:44:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6501 states, 3627 states have (on average 1.267714364488558) internal successors, (4598), 3876 states have internal predecessors, (4598), 2267 states have call successors, (2267), 624 states have call predecessors, (2267), 604 states have return successors, (2295), 2183 states have call predecessors, (2295), 2261 states have call successors, (2295) [2022-11-23 14:44:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6501 states to 6501 states and 9160 transitions. [2022-11-23 14:44:36,649 INFO L78 Accepts]: Start accepts. Automaton has 6501 states and 9160 transitions. Word has length 94 [2022-11-23 14:44:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:36,649 INFO L495 AbstractCegarLoop]: Abstraction has 6501 states and 9160 transitions. [2022-11-23 14:44:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (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) [2022-11-23 14:44:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6501 states and 9160 transitions. [2022-11-23 14:44:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 14:44:36,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:36,652 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:36,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:44:36,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -368284235, now seen corresponding path program 1 times [2022-11-23 14:44:36,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445002358] [2022-11-23 14:44:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 14:44:37,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445002358] [2022-11-23 14:44:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445002358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:37,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898776072] [2022-11-23 14:44:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:37,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:37,433 INFO L87 Difference]: Start difference. First operand 6501 states and 9160 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:44:40,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:42,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:46,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:48,055 INFO L93 Difference]: Finished difference Result 6515 states and 9171 transitions. [2022-11-23 14:44:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2022-11-23 14:44:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:48,084 INFO L225 Difference]: With dead ends: 6515 [2022-11-23 14:44:48,085 INFO L226 Difference]: Without dead ends: 6513 [2022-11-23 14:44:48,089 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:44:48,090 INFO L413 NwaCegarLoop]: 3171 mSDtfsCounter, 2492 mSDsluCounter, 8396 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 11567 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:48,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2495 Valid, 11567 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1451 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 14:44:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6513 states. [2022-11-23 14:44:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6513 to 6509. [2022-11-23 14:44:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 3633 states have (on average 1.2672722268097991) internal successors, (4604), 3882 states have internal predecessors, (4604), 2267 states have call successors, (2267), 626 states have call predecessors, (2267), 606 states have return successors, (2295), 2183 states have call predecessors, (2295), 2261 states have call successors, (2295) [2022-11-23 14:44:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 9166 transitions. [2022-11-23 14:44:48,629 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 9166 transitions. Word has length 92 [2022-11-23 14:44:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:48,631 INFO L495 AbstractCegarLoop]: Abstraction has 6509 states and 9166 transitions. [2022-11-23 14:44:48,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:44:48,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 9166 transitions. [2022-11-23 14:44:48,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 14:44:48,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:48,635 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:44:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:44:48,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1761388993, now seen corresponding path program 1 times [2022-11-23 14:44:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786054493] [2022-11-23 14:44:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-23 14:44:49,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:49,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786054493] [2022-11-23 14:44:49,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786054493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:49,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:49,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254837785] [2022-11-23 14:44:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:49,379 INFO L87 Difference]: Start difference. First operand 6509 states and 9166 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) [2022-11-23 14:44:51,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:53,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:55,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:57,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:59,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:01,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:05,277 INFO L93 Difference]: Finished difference Result 6519 states and 9175 transitions. [2022-11-23 14:45:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:05,285 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 [2022-11-23 14:45:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:05,315 INFO L225 Difference]: With dead ends: 6519 [2022-11-23 14:45:05,315 INFO L226 Difference]: Without dead ends: 6515 [2022-11-23 14:45:05,320 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:45:05,321 INFO L413 NwaCegarLoop]: 2650 mSDtfsCounter, 2991 mSDsluCounter, 5279 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2992 SdHoareTripleChecker+Valid, 7929 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:05,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2992 Valid, 7929 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1133 Invalid, 4 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 14:45:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2022-11-23 14:45:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6515. [2022-11-23 14:45:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6515 states, 3638 states have (on average 1.2666300164925783) internal successors, (4608), 3886 states have internal predecessors, (4608), 2267 states have call successors, (2267), 628 states have call predecessors, (2267), 607 states have return successors, (2295), 2183 states have call predecessors, (2295), 2261 states have call successors, (2295) [2022-11-23 14:45:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6515 states to 6515 states and 9170 transitions. [2022-11-23 14:45:06,061 INFO L78 Accepts]: Start accepts. Automaton has 6515 states and 9170 transitions. Word has length 105 [2022-11-23 14:45:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:06,062 INFO L495 AbstractCegarLoop]: Abstraction has 6515 states and 9170 transitions. [2022-11-23 14:45:06,063 INFO L496 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) [2022-11-23 14:45:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6515 states and 9170 transitions. [2022-11-23 14:45:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 14:45:06,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:06,067 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:45:06,067 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:45:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -89583916, now seen corresponding path program 1 times [2022-11-23 14:45:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589222551] [2022-11-23 14:45:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-23 14:45:06,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:06,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589222551] [2022-11-23 14:45:06,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589222551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:06,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:06,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145038673] [2022-11-23 14:45:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:06,730 INFO L87 Difference]: Start difference. First operand 6515 states and 9170 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:45:09,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:11,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:17,793 INFO L93 Difference]: Finished difference Result 9330 states and 13071 transitions. [2022-11-23 14:45:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 110 [2022-11-23 14:45:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:17,841 INFO L225 Difference]: With dead ends: 9330 [2022-11-23 14:45:17,842 INFO L226 Difference]: Without dead ends: 9212 [2022-11-23 14:45:17,848 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:45:17,849 INFO L413 NwaCegarLoop]: 3155 mSDtfsCounter, 2729 mSDsluCounter, 7998 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2729 SdHoareTripleChecker+Valid, 11153 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:17,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2729 Valid, 11153 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1434 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2022-11-23 14:45:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9212 states. [2022-11-23 14:45:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9212 to 9196. [2022-11-23 14:45:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 5186 states have (on average 1.261473197069032) internal successors, (6542), 5520 states have internal predecessors, (6542), 3103 states have call successors, (3103), 969 states have call predecessors, (3103), 904 states have return successors, (3286), 2939 states have call predecessors, (3286), 3093 states have call successors, (3286) [2022-11-23 14:45:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 12931 transitions. [2022-11-23 14:45:18,563 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 12931 transitions. Word has length 110 [2022-11-23 14:45:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:18,564 INFO L495 AbstractCegarLoop]: Abstraction has 9196 states and 12931 transitions. [2022-11-23 14:45:18,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:45:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 12931 transitions. [2022-11-23 14:45:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 14:45:18,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:18,568 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:18,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:45:18,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:45:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 637000168, now seen corresponding path program 1 times [2022-11-23 14:45:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338127904] [2022-11-23 14:45:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:45:20,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338127904] [2022-11-23 14:45:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338127904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:20,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:20,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661221808] [2022-11-23 14:45:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:20,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:20,313 INFO L87 Difference]: Start difference. First operand 9196 states and 12931 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:45:22,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:25,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:30,794 INFO L93 Difference]: Finished difference Result 9230 states and 12961 transitions. [2022-11-23 14:45:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 118 [2022-11-23 14:45:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:30,829 INFO L225 Difference]: With dead ends: 9230 [2022-11-23 14:45:30,829 INFO L226 Difference]: Without dead ends: 9228 [2022-11-23 14:45:30,833 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:45:30,834 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 2701 mSDsluCounter, 8010 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 11162 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:30,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 11162 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1422 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2022-11-23 14:45:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2022-11-23 14:45:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 9212. [2022-11-23 14:45:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9212 states, 5198 states have (on average 1.260100038476337) internal successors, (6550), 5532 states have internal predecessors, (6550), 3103 states have call successors, (3103), 973 states have call predecessors, (3103), 908 states have return successors, (3286), 2939 states have call predecessors, (3286), 3093 states have call successors, (3286) [2022-11-23 14:45:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9212 states to 9212 states and 12939 transitions. [2022-11-23 14:45:31,817 INFO L78 Accepts]: Start accepts. Automaton has 9212 states and 12939 transitions. Word has length 118 [2022-11-23 14:45:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:31,817 INFO L495 AbstractCegarLoop]: Abstraction has 9212 states and 12939 transitions. [2022-11-23 14:45:31,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:45:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 9212 states and 12939 transitions. [2022-11-23 14:45:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 14:45:31,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:31,824 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:45:31,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:45:31,825 INFO L420 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)] === [2022-11-23 14:45:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash -747635842, now seen corresponding path program 1 times [2022-11-23 14:45:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:31,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724800107] [2022-11-23 14:45:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-23 14:45:32,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724800107] [2022-11-23 14:45:32,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724800107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:32,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:32,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432798407] [2022-11-23 14:45:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:32,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:32,914 INFO L87 Difference]: Start difference. First operand 9212 states and 12939 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) [2022-11-23 14:45:35,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:37,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:44,254 INFO L93 Difference]: Finished difference Result 9633 states and 13439 transitions. [2022-11-23 14:45:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:44,256 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 [2022-11-23 14:45:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:44,309 INFO L225 Difference]: With dead ends: 9633 [2022-11-23 14:45:44,309 INFO L226 Difference]: Without dead ends: 9619 [2022-11-23 14:45:44,318 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:45:44,319 INFO L413 NwaCegarLoop]: 2978 mSDtfsCounter, 691 mSDsluCounter, 8341 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 11319 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:44,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 11319 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1689 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 14:45:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9619 states. [2022-11-23 14:45:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9619 to 9598. [2022-11-23 14:45:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 5415 states have (on average 1.2554016620498616) internal successors, (6798), 5752 states have internal predecessors, (6798), 3196 states have call successors, (3196), 1050 states have call predecessors, (3196), 984 states have return successors, (3401), 3031 states have call predecessors, (3401), 3187 states have call successors, (3401) [2022-11-23 14:45:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 13395 transitions. [2022-11-23 14:45:45,457 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 13395 transitions. Word has length 146 [2022-11-23 14:45:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:45,457 INFO L495 AbstractCegarLoop]: Abstraction has 9598 states and 13395 transitions. [2022-11-23 14:45:45,457 INFO L496 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) [2022-11-23 14:45:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 13395 transitions. [2022-11-23 14:45:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 14:45:45,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:45,463 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:45:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:45:45,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:45:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 383872415, now seen corresponding path program 1 times [2022-11-23 14:45:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:45,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424245731] [2022-11-23 14:45:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 14:45:47,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424245731] [2022-11-23 14:45:47,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424245731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:47,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:47,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270396872] [2022-11-23 14:45:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:47,084 INFO L87 Difference]: Start difference. First operand 9598 states and 13395 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) [2022-11-23 14:45:49,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:52,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:54,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:57,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:02,134 INFO L93 Difference]: Finished difference Result 9629 states and 13422 transitions. [2022-11-23 14:46:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:46:02,135 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 [2022-11-23 14:46:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:02,173 INFO L225 Difference]: With dead ends: 9629 [2022-11-23 14:46:02,173 INFO L226 Difference]: Without dead ends: 9627 [2022-11-23 14:46:02,180 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:46:02,181 INFO L413 NwaCegarLoop]: 3961 mSDtfsCounter, 2461 mSDsluCounter, 10483 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 14444 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:02,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2464 Valid, 14444 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1897 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2022-11-23 14:46:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-11-23 14:46:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9610. [2022-11-23 14:46:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9610 states, 5424 states have (on average 1.2549778761061947) internal successors, (6807), 5761 states have internal predecessors, (6807), 3196 states have call successors, (3196), 1053 states have call predecessors, (3196), 987 states have return successors, (3401), 3031 states have call predecessors, (3401), 3187 states have call successors, (3401) [2022-11-23 14:46:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9610 states to 9610 states and 13404 transitions. [2022-11-23 14:46:03,083 INFO L78 Accepts]: Start accepts. Automaton has 9610 states and 13404 transitions. Word has length 152 [2022-11-23 14:46:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:03,084 INFO L495 AbstractCegarLoop]: Abstraction has 9610 states and 13404 transitions. [2022-11-23 14:46:03,084 INFO L496 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) [2022-11-23 14:46:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9610 states and 13404 transitions. [2022-11-23 14:46:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-23 14:46:03,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:03,091 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:46:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:46:03,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:46:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash -693180425, now seen corresponding path program 1 times [2022-11-23 14:46:03,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483051636] [2022-11-23 14:46:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-23 14:46:05,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:05,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483051636] [2022-11-23 14:46:05,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483051636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:05,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:05,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302295774] [2022-11-23 14:46:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:05,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:05,371 INFO L87 Difference]: Start difference. First operand 9610 states and 13404 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) [2022-11-23 14:46:07,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:10,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:12,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:17,367 INFO L93 Difference]: Finished difference Result 9626 states and 13417 transitions. [2022-11-23 14:46:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:46:17,369 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 [2022-11-23 14:46:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:17,412 INFO L225 Difference]: With dead ends: 9626 [2022-11-23 14:46:17,413 INFO L226 Difference]: Without dead ends: 9624 [2022-11-23 14:46:17,419 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:46:17,420 INFO L413 NwaCegarLoop]: 2760 mSDtfsCounter, 2695 mSDsluCounter, 6126 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 8886 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:17,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2698 Valid, 8886 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1228 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2022-11-23 14:46:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9624 states. [2022-11-23 14:46:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9624 to 9614. [2022-11-23 14:46:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 5427 states have (on average 1.2544683987470058) internal successors, (6808), 5764 states have internal predecessors, (6808), 3196 states have call successors, (3196), 1054 states have call predecessors, (3196), 988 states have return successors, (3401), 3031 states have call predecessors, (3401), 3187 states have call successors, (3401) [2022-11-23 14:46:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 13405 transitions. [2022-11-23 14:46:18,375 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 13405 transitions. Word has length 161 [2022-11-23 14:46:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:18,376 INFO L495 AbstractCegarLoop]: Abstraction has 9614 states and 13405 transitions. [2022-11-23 14:46:18,377 INFO L496 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) [2022-11-23 14:46:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 13405 transitions. [2022-11-23 14:46:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-23 14:46:18,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:18,383 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:46:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:46:18,384 INFO L420 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)] === [2022-11-23 14:46:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1735578439, now seen corresponding path program 1 times [2022-11-23 14:46:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:18,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906513060] [2022-11-23 14:46:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-23 14:46:19,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906513060] [2022-11-23 14:46:19,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906513060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:19,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954643910] [2022-11-23 14:46:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:19,475 INFO L87 Difference]: Start difference. First operand 9614 states and 13405 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) [2022-11-23 14:46:22,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:24,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:26,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:34,265 INFO L93 Difference]: Finished difference Result 10960 states and 15077 transitions. [2022-11-23 14:46:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:46:34,266 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 [2022-11-23 14:46:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:34,304 INFO L225 Difference]: With dead ends: 10960 [2022-11-23 14:46:34,304 INFO L226 Difference]: Without dead ends: 10958 [2022-11-23 14:46:34,310 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:46:34,311 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 1559 mSDsluCounter, 8991 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 12308 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:34,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 12308 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1709 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2022-11-23 14:46:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10958 states. [2022-11-23 14:46:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10958 to 10946. [2022-11-23 14:46:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10946 states, 6122 states have (on average 1.2440378961123815) internal successors, (7616), 6493 states have internal predecessors, (7616), 3620 states have call successors, (3620), 1272 states have call predecessors, (3620), 1201 states have return successors, (3825), 3444 states have call predecessors, (3825), 3611 states have call successors, (3825) [2022-11-23 14:46:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10946 states to 10946 states and 15061 transitions. [2022-11-23 14:46:35,342 INFO L78 Accepts]: Start accepts. Automaton has 10946 states and 15061 transitions. Word has length 177 [2022-11-23 14:46:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:35,342 INFO L495 AbstractCegarLoop]: Abstraction has 10946 states and 15061 transitions. [2022-11-23 14:46:35,343 INFO L496 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) [2022-11-23 14:46:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10946 states and 15061 transitions. [2022-11-23 14:46:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-23 14:46:35,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:35,355 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:46:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:46:35,355 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:46:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash 326091484, now seen corresponding path program 1 times [2022-11-23 14:46:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:35,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426228167] [2022-11-23 14:46:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-11-23 14:46:37,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426228167] [2022-11-23 14:46:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426228167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:37,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012575077] [2022-11-23 14:46:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:37,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:37,225 INFO L87 Difference]: Start difference. First operand 10946 states and 15061 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) [2022-11-23 14:46:39,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:41,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:49,074 INFO L93 Difference]: Finished difference Result 18517 states and 25700 transitions. [2022-11-23 14:46:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:46:49,076 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 [2022-11-23 14:46:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:49,147 INFO L225 Difference]: With dead ends: 18517 [2022-11-23 14:46:49,147 INFO L226 Difference]: Without dead ends: 18515 [2022-11-23 14:46:49,158 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:46:49,159 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 2777 mSDsluCounter, 9613 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2780 SdHoareTripleChecker+Valid, 13124 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:49,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2780 Valid, 13124 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1537 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2022-11-23 14:46:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18515 states. [2022-11-23 14:46:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18515 to 18464. [2022-11-23 14:46:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18464 states, 10336 states have (on average 1.248452012383901) internal successors, (12904), 10976 states have internal predecessors, (12904), 6140 states have call successors, (6140), 2096 states have call predecessors, (6140), 1985 states have return successors, (6601), 5854 states have call predecessors, (6601), 6131 states have call successors, (6601) [2022-11-23 14:46:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18464 states to 18464 states and 25645 transitions. [2022-11-23 14:46:50,682 INFO L78 Accepts]: Start accepts. Automaton has 18464 states and 25645 transitions. Word has length 236 [2022-11-23 14:46:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:50,683 INFO L495 AbstractCegarLoop]: Abstraction has 18464 states and 25645 transitions. [2022-11-23 14:46:50,683 INFO L496 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) [2022-11-23 14:46:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 18464 states and 25645 transitions. [2022-11-23 14:46:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-23 14:46:50,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:50,696 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:46:50,697 INFO L420 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)] === [2022-11-23 14:46:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash 129101396, now seen corresponding path program 1 times [2022-11-23 14:46:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551984076] [2022-11-23 14:46:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-23 14:46:51,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551984076] [2022-11-23 14:46:51,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551984076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:51,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:51,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:46:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039425928] [2022-11-23 14:46:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:46:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:46:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:46:51,302 INFO L87 Difference]: Start difference. First operand 18464 states and 25645 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2022-11-23 14:46:53,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:54,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:56,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:01,202 INFO L93 Difference]: Finished difference Result 36948 states and 51620 transitions. [2022-11-23 14:47:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:47:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 255 [2022-11-23 14:47:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:01,289 INFO L225 Difference]: With dead ends: 36948 [2022-11-23 14:47:01,289 INFO L226 Difference]: Without dead ends: 18500 [2022-11-23 14:47:01,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:01,368 INFO L413 NwaCegarLoop]: 2653 mSDtfsCounter, 1 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5296 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:01,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 5296 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 748 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 14:47:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18500 states. [2022-11-23 14:47:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18500 to 18470. [2022-11-23 14:47:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 10342 states have (on average 1.2483078708180235) internal successors, (12910), 10982 states have internal predecessors, (12910), 6140 states have call successors, (6140), 2096 states have call predecessors, (6140), 1985 states have return successors, (6601), 5854 states have call predecessors, (6601), 6131 states have call successors, (6601) [2022-11-23 14:47:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 25651 transitions. [2022-11-23 14:47:02,740 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 25651 transitions. Word has length 255 [2022-11-23 14:47:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:02,741 INFO L495 AbstractCegarLoop]: Abstraction has 18470 states and 25651 transitions. [2022-11-23 14:47:02,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2022-11-23 14:47:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 25651 transitions. [2022-11-23 14:47:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-23 14:47:02,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:02,753 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:02,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:47:02,753 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2045869004, now seen corresponding path program 1 times [2022-11-23 14:47:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637519016] [2022-11-23 14:47:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-23 14:47:05,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637519016] [2022-11-23 14:47:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637519016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:05,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:05,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:47:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822870252] [2022-11-23 14:47:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:05,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:47:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:47:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:47:05,187 INFO L87 Difference]: Start difference. First operand 18470 states and 25651 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2022-11-23 14:47:09,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:11,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:14,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:16,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:33,827 INFO L93 Difference]: Finished difference Result 19001 states and 26371 transitions. [2022-11-23 14:47:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:47:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 242 [2022-11-23 14:47:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:33,910 INFO L225 Difference]: With dead ends: 19001 [2022-11-23 14:47:33,910 INFO L226 Difference]: Without dead ends: 18999 [2022-11-23 14:47:33,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:47:33,922 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 3351 mSDsluCounter, 3574 mSDsCounter, 0 mSdLazyCounter, 9251 mSolverCounterSat, 2341 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3803 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 11595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2341 IncrementalHoareTripleChecker+Valid, 9251 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:33,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3803 Valid, 5023 Invalid, 11595 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2341 Valid, 9251 Invalid, 3 Unknown, 0 Unchecked, 26.4s Time] [2022-11-23 14:47:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2022-11-23 14:47:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 18672. [2022-11-23 14:47:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18672 states, 10445 states have (on average 1.2463379607467688) internal successors, (13018), 11089 states have internal predecessors, (13018), 6171 states have call successors, (6171), 2098 states have call predecessors, (6171), 2053 states have return successors, (6637), 5947 states have call predecessors, (6637), 6162 states have call successors, (6637) [2022-11-23 14:47:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18672 states to 18672 states and 25826 transitions. [2022-11-23 14:47:35,323 INFO L78 Accepts]: Start accepts. Automaton has 18672 states and 25826 transitions. Word has length 242 [2022-11-23 14:47:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:35,324 INFO L495 AbstractCegarLoop]: Abstraction has 18672 states and 25826 transitions. [2022-11-23 14:47:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (48), 4 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2022-11-23 14:47:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 18672 states and 25826 transitions. [2022-11-23 14:47:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-23 14:47:35,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:35,438 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:47:35,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:47:35,439 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -309643232, now seen corresponding path program 1 times [2022-11-23 14:47:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634723438] [2022-11-23 14:47:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-23 14:47:36,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:36,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634723438] [2022-11-23 14:47:36,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634723438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:36,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:36,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:47:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345268702] [2022-11-23 14:47:36,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:36,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:47:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:47:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:47:36,160 INFO L87 Difference]: Start difference. First operand 18672 states and 25826 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) [2022-11-23 14:47:38,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:40,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:48,444 INFO L93 Difference]: Finished difference Result 37851 states and 52581 transitions. [2022-11-23 14:47:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:47:48,446 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 [2022-11-23 14:47:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:48,525 INFO L225 Difference]: With dead ends: 37851 [2022-11-23 14:47:48,525 INFO L226 Difference]: Without dead ends: 19195 [2022-11-23 14:47:48,614 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:47:48,615 INFO L413 NwaCegarLoop]: 3174 mSDtfsCounter, 2679 mSDsluCounter, 8417 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 77 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 11591 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:48,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 11591 Invalid, 1583 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [77 Valid, 1504 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 14:47:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19195 states. [2022-11-23 14:47:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19195 to 18881. [2022-11-23 14:47:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18881 states, 10584 states have (on average 1.24848828420257) internal successors, (13214), 11245 states have internal predecessors, (13214), 6239 states have call successors, (6239), 2098 states have call predecessors, (6239), 2055 states have return successors, (6724), 6018 states have call predecessors, (6724), 6230 states have call successors, (6724) [2022-11-23 14:47:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18881 states to 18881 states and 26177 transitions. [2022-11-23 14:47:50,432 INFO L78 Accepts]: Start accepts. Automaton has 18881 states and 26177 transitions. Word has length 254 [2022-11-23 14:47:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:50,433 INFO L495 AbstractCegarLoop]: Abstraction has 18881 states and 26177 transitions. [2022-11-23 14:47:50,433 INFO L496 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) [2022-11-23 14:47:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 18881 states and 26177 transitions. [2022-11-23 14:47:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-23 14:47:50,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:50,449 INFO L195 NwaCegarLoop]: 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] [2022-11-23 14:47:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:47:50,449 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 369693137, now seen corresponding path program 1 times [2022-11-23 14:47:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240239777] [2022-11-23 14:47:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:50,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-23 14:47:52,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:52,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240239777] [2022-11-23 14:47:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240239777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:52,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:52,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:47:52,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137801777] [2022-11-23 14:47:52,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:47:52,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:47:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:47:52,018 INFO L87 Difference]: Start difference. First operand 18881 states and 26177 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) [2022-11-23 14:47:54,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:56,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:06,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:11,949 INFO L93 Difference]: Finished difference Result 22096 states and 30665 transitions. [2022-11-23 14:48:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:48:11,950 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 [2022-11-23 14:48:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:12,024 INFO L225 Difference]: With dead ends: 22096 [2022-11-23 14:48:12,025 INFO L226 Difference]: Without dead ends: 22018 [2022-11-23 14:48:12,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:48:12,034 INFO L413 NwaCegarLoop]: 3136 mSDtfsCounter, 3726 mSDsluCounter, 7139 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 418 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 10275 SdHoareTripleChecker+Invalid, 7162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:12,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 10275 Invalid, 7162 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [418 Valid, 6742 Invalid, 2 Unknown, 0 Unchecked, 17.3s Time] [2022-11-23 14:48:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22018 states. [2022-11-23 14:48:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22018 to 21931. [2022-11-23 14:48:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21931 states, 12309 states have (on average 1.2466487935656836) internal successors, (15345), 13075 states have internal predecessors, (15345), 7250 states have call successors, (7250), 2435 states have call predecessors, (7250), 2369 states have return successors, (7883), 6973 states have call predecessors, (7883), 7241 states have call successors, (7883) [2022-11-23 14:48:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21931 states to 21931 states and 30478 transitions. [2022-11-23 14:48:14,098 INFO L78 Accepts]: Start accepts. Automaton has 21931 states and 30478 transitions. Word has length 267 [2022-11-23 14:48:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:14,099 INFO L495 AbstractCegarLoop]: Abstraction has 21931 states and 30478 transitions. [2022-11-23 14:48:14,099 INFO L496 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) [2022-11-23 14:48:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 21931 states and 30478 transitions. [2022-11-23 14:48:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-23 14:48:14,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:14,109 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-23 14:48:14,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 14:48:14,110 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:48:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:14,110 INFO L85 PathProgramCache]: Analyzing trace with hash 503075367, now seen corresponding path program 1 times [2022-11-23 14:48:14,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:14,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75662324] [2022-11-23 14:48:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-23 14:48:14,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75662324] [2022-11-23 14:48:14,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75662324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129754774] [2022-11-23 14:48:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:14,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:14,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:14,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92cb95c9-2ab7-4a5d-aafc-e87e38b27bf6/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:48:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:17,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 6522 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:48:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 140 proven. 33 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-23 14:48:17,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-23 14:48:18,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129754774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083459965] [2022-11-23 14:48:18,115 INFO L159 IcfgInterpreter]: Started Sifa with 177 locations of interest [2022-11-23 14:48:18,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:18,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:18,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:18,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:20,504 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 7033 DAG size of output: 6836 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:50:35,701 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 7033 DAG size of output: 6836 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:27,732 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:33,097 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:39,761 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 7039 DAG size of output: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:45,790 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:51,497 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:53:58,491 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 7039 DAG size of output: 6842 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-23 14:55:13,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:55:13,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9