./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5e82a719a5cd0ec3a30cd42dbacb612fd330a6d3aa584d331bc796b2ce8b6a55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:11:24,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:11:24,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:11:24,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:11:24,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:11:24,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:11:24,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:11:24,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:11:24,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:11:24,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:11:24,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:11:24,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:11:24,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:11:24,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:11:24,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:11:24,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:11:24,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:11:24,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:11:24,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:11:24,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:11:24,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:11:24,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:11:24,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:11:24,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:11:24,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:11:24,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:11:24,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:11:24,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:11:24,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:11:24,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:11:24,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:11:24,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:11:24,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:11:24,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:11:24,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:11:24,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:11:24,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:11:24,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:11:24,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:11:24,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:11:24,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:11:24,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:11:24,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:11:24,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:11:24,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:11:24,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:11:24,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:11:24,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:11:24,532 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:11:24,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:11:24,533 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:11:24,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:11:24,533 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:11:24,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:11:24,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:11:24,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:11:24,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:11:24,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:11:24,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:11:24,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:11:24,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:11:24,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:11:24,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:11:24,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:11:24,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:11:24,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:11:24,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:24,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:11:24,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:11:24,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:11:24,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:11:24,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:11:24,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:11:24,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:11:24,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:11:24,539 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e82a719a5cd0ec3a30cd42dbacb612fd330a6d3aa584d331bc796b2ce8b6a55 [2021-11-21 01:11:24,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:11:24,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:11:24,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:11:24,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:11:24,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:11:24,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i [2021-11-21 01:11:24,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/data/00b6e026c/9091550721434807a60ed379cd1c4cbc/FLAG730b830ef [2021-11-21 01:11:25,808 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:11:25,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i [2021-11-21 01:11:25,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/data/00b6e026c/9091550721434807a60ed379cd1c4cbc/FLAG730b830ef [2021-11-21 01:11:26,273 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/data/00b6e026c/9091550721434807a60ed379cd1c4cbc [2021-11-21 01:11:26,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:11:26,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:11:26,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:26,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:11:26,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:11:26,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:26" (1/1) ... [2021-11-21 01:11:26,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e77b878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:26, skipping insertion in model container [2021-11-21 01:11:26,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:11:26" (1/1) ... [2021-11-21 01:11:26,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:11:26,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:11:29,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350019,350032] [2021-11-21 01:11:29,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350188,350201] [2021-11-21 01:11:29,589 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350355,350368] [2021-11-21 01:11:29,590 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350523,350536] [2021-11-21 01:11:29,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:29,653 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:11:30,090 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350019,350032] [2021-11-21 01:11:30,091 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350188,350201] [2021-11-21 01:11:30,091 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350355,350368] [2021-11-21 01:11:30,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i[350523,350536] [2021-11-21 01:11:30,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:11:30,336 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:11:30,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30 WrapperNode [2021-11-21 01:11:30,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:11:30,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:30,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:11:30,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:11:30,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,715 INFO L137 Inliner]: procedures = 407, calls = 2544, calls flagged for inlining = 197, calls inlined = 171, statements flattened = 4952 [2021-11-21 01:11:30,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:11:30,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:11:30,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:11:30,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:11:30,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:30,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:31,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:11:31,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:11:31,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:11:31,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:11:31,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (1/1) ... [2021-11-21 01:11:31,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:11:31,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:11:31,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:11:31,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:11:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-21 01:11:31,126 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-21 01:11:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_detach [2021-11-21 01:11:31,126 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_detach [2021-11-21 01:11:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-21 01:11:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-21 01:11:31,127 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:11:31,127 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:11:31,127 INFO L130 BoogieDeclarations]: Found specification of procedure mhz_3288_power [2021-11-21 01:11:31,128 INFO L138 BoogieDeclarations]: Found implementation of procedure mhz_3288_power [2021-11-21 01:11:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:11:31,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:11:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_request_io [2021-11-21 01:11:31,128 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_request_io [2021-11-21 01:11:31,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_70 [2021-11-21 01:11:31,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_70 [2021-11-21 01:11:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:11:31,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:11:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:11:31,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:11:31,129 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 01:11:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 01:11:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_resume [2021-11-21 01:11:31,130 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_resume [2021-11-21 01:11:31,130 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_suspend [2021-11-21 01:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_suspend [2021-11-21 01:11:31,131 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:11:31,131 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-21 01:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-21 01:11:31,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:11:31,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-21 01:11:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-21 01:11:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-21 01:11:31,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-21 01:11:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 01:11:31,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 01:11:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure cvt_ascii_address [2021-11-21 01:11:31,135 INFO L138 BoogieDeclarations]: Found implementation of procedure cvt_ascii_address [2021-11-21 01:11:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:11:31,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:11:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:11:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:11:31,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:11:31,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-21 01:11:31,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-21 01:11:31,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smc91c92_cs_driver_exit_13_2 [2021-11-21 01:11:31,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smc91c92_cs_driver_exit_13_2 [2021-11-21 01:11:31,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:11:31,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:11:31,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:11:31,138 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:11:31,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:11:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:11:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 01:11:31,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 01:11:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure smc_tx_timeout [2021-11-21 01:11:31,139 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_tx_timeout [2021-11-21 01:11:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-21 01:11:31,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-21 01:11:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure smc_reset [2021-11-21 01:11:31,140 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_reset [2021-11-21 01:11:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-21 01:11:31,140 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-21 01:11:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-21 01:11:31,141 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-21 01:11:31,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:11:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:11:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:11:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:11:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure smc_hardware_send_packet [2021-11-21 01:11:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_hardware_send_packet [2021-11-21 01:11:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:11:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:11:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-21 01:11:31,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-21 01:11:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_smc_private [2021-11-21 01:11:31,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_smc_private [2021-11-21 01:11:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure osi_load_firmware [2021-11-21 01:11:31,145 INFO L138 BoogieDeclarations]: Found implementation of procedure osi_load_firmware [2021-11-21 01:11:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:11:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:11:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure smc_set_xcvr [2021-11-21 01:11:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_set_xcvr [2021-11-21 01:11:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-21 01:11:31,146 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-21 01:11:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:11:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 01:11:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 01:11:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:11:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 01:11:31,147 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 01:11:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure mot_config [2021-11-21 01:11:31,148 INFO L138 BoogieDeclarations]: Found implementation of procedure mot_config [2021-11-21 01:11:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:11:31,148 INFO L130 BoogieDeclarations]: Found specification of procedure check_sig [2021-11-21 01:11:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure check_sig [2021-11-21 01:11:31,149 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-21 01:11:31,149 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-21 01:11:31,150 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:11:31,150 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:11:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 01:11:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 01:11:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:11:31,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:11:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-21 01:11:31,155 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-21 01:11:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-21 01:11:31,155 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-21 01:11:31,155 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 01:11:31,161 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 01:11:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 01:11:31,162 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 01:11:31,162 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 01:11:31,162 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 01:11:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:11:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_loop_tuple [2021-11-21 01:11:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_loop_tuple [2021-11-21 01:11:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_release [2021-11-21 01:11:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_release [2021-11-21 01:11:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:11:31,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:11:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_smc_private [2021-11-21 01:11:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_smc_private [2021-11-21 01:11:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_loop_config [2021-11-21 01:11:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_loop_config [2021-11-21 01:11:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:11:31,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:11:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure smc_interrupt [2021-11-21 01:11:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_interrupt [2021-11-21 01:11:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 01:11:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 01:11:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:11:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-21 01:11:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-21 01:11:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:11:31,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:11:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-21 01:11:31,166 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-21 01:11:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-21 01:11:31,166 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-21 01:11:31,991 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:11:31,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:11:32,305 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:11:37,420 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:11:37,518 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:11:38,422 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:11:38,423 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:11:38,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:38 BoogieIcfgContainer [2021-11-21 01:11:38,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:11:38,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:11:38,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:11:38,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:11:38,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:11:26" (1/3) ... [2021-11-21 01:11:38,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fb2a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:38, skipping insertion in model container [2021-11-21 01:11:38,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:11:30" (2/3) ... [2021-11-21 01:11:38,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15fb2a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:11:38, skipping insertion in model container [2021-11-21 01:11:38,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:11:38" (3/3) ... [2021-11-21 01:11:38,438 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-smc91c92_cs.cil.i [2021-11-21 01:11:38,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:11:38,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:11:38,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:11:38,513 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:11:38,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:11:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 1226 states, 693 states have (on average 1.2972582972582973) internal successors, (899), 714 states have internal predecessors, (899), 464 states have call successors, (464), 67 states have call predecessors, (464), 66 states have return successors, (458), 456 states have call predecessors, (458), 458 states have call successors, (458) [2021-11-21 01:11:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:11:38,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:38,583 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:38,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1894641789, now seen corresponding path program 1 times [2021-11-21 01:11:38,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:38,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660614380] [2021-11-21 01:11:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:38,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-21 01:11:39,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660614380] [2021-11-21 01:11:39,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660614380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:39,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:39,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:39,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012154664] [2021-11-21 01:11:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:39,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:39,433 INFO L87 Difference]: Start difference. First operand has 1226 states, 693 states have (on average 1.2972582972582973) internal successors, (899), 714 states have internal predecessors, (899), 464 states have call successors, (464), 67 states have call predecessors, (464), 66 states have return successors, (458), 456 states have call predecessors, (458), 458 states have call successors, (458) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:11:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:42,620 INFO L93 Difference]: Finished difference Result 3554 states and 5367 transitions. [2021-11-21 01:11:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 141 [2021-11-21 01:11:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:42,658 INFO L225 Difference]: With dead ends: 3554 [2021-11-21 01:11:42,658 INFO L226 Difference]: Without dead ends: 2343 [2021-11-21 01:11:42,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:42,677 INFO L933 BasicCegarLoop]: 2002 mSDtfsCounter, 1695 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 3550 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 3550 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 01:11:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-11-21 01:11:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2339. [2021-11-21 01:11:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 1336 states have (on average 1.2911676646706587) internal successors, (1725), 1377 states have internal predecessors, (1725), 872 states have call successors, (872), 129 states have call predecessors, (872), 128 states have return successors, (868), 864 states have call predecessors, (868), 868 states have call successors, (868) [2021-11-21 01:11:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3465 transitions. [2021-11-21 01:11:43,018 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3465 transitions. Word has length 141 [2021-11-21 01:11:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:43,022 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 3465 transitions. [2021-11-21 01:11:43,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:11:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3465 transitions. [2021-11-21 01:11:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-21 01:11:43,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:43,042 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:11:43,043 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1812542787, now seen corresponding path program 1 times [2021-11-21 01:11:43,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142230593] [2021-11-21 01:11:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:43,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-21 01:11:43,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:43,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142230593] [2021-11-21 01:11:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142230593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:43,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:43,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914991230] [2021-11-21 01:11:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:43,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:43,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:43,395 INFO L87 Difference]: Start difference. First operand 2339 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:11:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:46,049 INFO L93 Difference]: Finished difference Result 6545 states and 9657 transitions. [2021-11-21 01:11:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:46,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 149 [2021-11-21 01:11:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:46,091 INFO L225 Difference]: With dead ends: 6545 [2021-11-21 01:11:46,091 INFO L226 Difference]: Without dead ends: 4231 [2021-11-21 01:11:46,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:46,106 INFO L933 BasicCegarLoop]: 1932 mSDtfsCounter, 1424 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 3457 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:46,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 3457 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:11:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-11-21 01:11:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4202. [2021-11-21 01:11:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 2401 states have (on average 1.2811328613077884) internal successors, (3076), 2481 states have internal predecessors, (3076), 1555 states have call successors, (1555), 248 states have call predecessors, (1555), 243 states have return successors, (1551), 1532 states have call predecessors, (1551), 1551 states have call successors, (1551) [2021-11-21 01:11:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 6182 transitions. [2021-11-21 01:11:46,452 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 6182 transitions. Word has length 149 [2021-11-21 01:11:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:46,453 INFO L470 AbstractCegarLoop]: Abstraction has 4202 states and 6182 transitions. [2021-11-21 01:11:46,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 01:11:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 6182 transitions. [2021-11-21 01:11:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:11:46,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:46,458 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:46,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:11:46,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1924692558, now seen corresponding path program 1 times [2021-11-21 01:11:46,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344883464] [2021-11-21 01:11:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:46,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-21 01:11:46,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:46,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344883464] [2021-11-21 01:11:46,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344883464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:46,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:46,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:46,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435468591] [2021-11-21 01:11:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:46,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:46,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:46,708 INFO L87 Difference]: Start difference. First operand 4202 states and 6182 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-21 01:11:48,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:48,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:48,934 INFO L93 Difference]: Finished difference Result 8345 states and 12266 transitions. [2021-11-21 01:11:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:48,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 158 [2021-11-21 01:11:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:48,969 INFO L225 Difference]: With dead ends: 8345 [2021-11-21 01:11:48,970 INFO L226 Difference]: Without dead ends: 4168 [2021-11-21 01:11:48,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:48,992 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1730 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 1609 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:11:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-11-21 01:11:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 4168. [2021-11-21 01:11:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 2387 states have (on average 1.278173439463762) internal successors, (3051), 2467 states have internal predecessors, (3051), 1531 states have call successors, (1531), 252 states have call predecessors, (1531), 247 states have return successors, (1527), 1508 states have call predecessors, (1527), 1527 states have call successors, (1527) [2021-11-21 01:11:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 6109 transitions. [2021-11-21 01:11:49,322 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 6109 transitions. Word has length 158 [2021-11-21 01:11:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:49,323 INFO L470 AbstractCegarLoop]: Abstraction has 4168 states and 6109 transitions. [2021-11-21 01:11:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-21 01:11:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 6109 transitions. [2021-11-21 01:11:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-21 01:11:49,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:49,327 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:49,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:11:49,328 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1426512100, now seen corresponding path program 1 times [2021-11-21 01:11:49,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:49,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496168756] [2021-11-21 01:11:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:49,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-21 01:11:49,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:49,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496168756] [2021-11-21 01:11:49,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496168756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:49,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:49,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:49,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030133699] [2021-11-21 01:11:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:49,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:49,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:49,545 INFO L87 Difference]: Start difference. First operand 4168 states and 6109 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-21 01:11:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:51,075 INFO L93 Difference]: Finished difference Result 7535 states and 11000 transitions. [2021-11-21 01:11:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 159 [2021-11-21 01:11:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:51,110 INFO L225 Difference]: With dead ends: 7535 [2021-11-21 01:11:51,110 INFO L226 Difference]: Without dead ends: 3410 [2021-11-21 01:11:51,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:51,138 INFO L933 BasicCegarLoop]: 1318 mSDtfsCounter, 1466 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:51,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 1369 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:11:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-11-21 01:11:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3410. [2021-11-21 01:11:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 1991 states have (on average 1.2903063787041689) internal successors, (2569), 2049 states have internal predecessors, (2569), 1185 states have call successors, (1185), 236 states have call predecessors, (1185), 231 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:11:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 4935 transitions. [2021-11-21 01:11:51,497 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 4935 transitions. Word has length 159 [2021-11-21 01:11:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:51,499 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 4935 transitions. [2021-11-21 01:11:51,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-21 01:11:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 4935 transitions. [2021-11-21 01:11:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-21 01:11:51,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:51,507 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 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] [2021-11-21 01:11:51,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:11:51,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1313072371, now seen corresponding path program 1 times [2021-11-21 01:11:51,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:51,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018095314] [2021-11-21 01:11:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:51,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-21 01:11:51,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018095314] [2021-11-21 01:11:51,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018095314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:51,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:51,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:51,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80478719] [2021-11-21 01:11:51,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:51,996 INFO L87 Difference]: Start difference. First operand 3410 states and 4935 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:11:53,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:55,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:11:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:56,478 INFO L93 Difference]: Finished difference Result 3416 states and 4940 transitions. [2021-11-21 01:11:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:56,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2021-11-21 01:11:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:56,510 INFO L225 Difference]: With dead ends: 3416 [2021-11-21 01:11:56,511 INFO L226 Difference]: Without dead ends: 3414 [2021-11-21 01:11:56,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:11:56,515 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 1456 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:56,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 3890 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:11:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2021-11-21 01:11:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 3414. [2021-11-21 01:11:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 1994 states have (on average 1.2898696088264794) internal successors, (2572), 2052 states have internal predecessors, (2572), 1185 states have call successors, (1185), 237 states have call predecessors, (1185), 232 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:11:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 4938 transitions. [2021-11-21 01:11:56,846 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 4938 transitions. Word has length 183 [2021-11-21 01:11:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:56,847 INFO L470 AbstractCegarLoop]: Abstraction has 3414 states and 4938 transitions. [2021-11-21 01:11:56,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:11:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 4938 transitions. [2021-11-21 01:11:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-21 01:11:56,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:56,853 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 5, 5, 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] [2021-11-21 01:11:56,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:11:56,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1339114439, now seen corresponding path program 1 times [2021-11-21 01:11:56,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32629348] [2021-11-21 01:11:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:56,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2021-11-21 01:11:57,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32629348] [2021-11-21 01:11:57,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32629348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:57,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:57,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:57,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667739733] [2021-11-21 01:11:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:57,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:57,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:57,200 INFO L87 Difference]: Start difference. First operand 3414 states and 4938 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:11:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:58,903 INFO L93 Difference]: Finished difference Result 3420 states and 4943 transitions. [2021-11-21 01:11:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:11:58,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 191 [2021-11-21 01:11:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:58,935 INFO L225 Difference]: With dead ends: 3420 [2021-11-21 01:11:58,935 INFO L226 Difference]: Without dead ends: 3418 [2021-11-21 01:11:58,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:11:58,939 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:58,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:11:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-11-21 01:11:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3418. [2021-11-21 01:11:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 1997 states have (on average 1.2894341512268404) internal successors, (2575), 2055 states have internal predecessors, (2575), 1185 states have call successors, (1185), 238 states have call predecessors, (1185), 233 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:11:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 4941 transitions. [2021-11-21 01:11:59,208 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 4941 transitions. Word has length 191 [2021-11-21 01:11:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:59,210 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 4941 transitions. [2021-11-21 01:11:59,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:11:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 4941 transitions. [2021-11-21 01:11:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-21 01:11:59,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:59,216 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 3, 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] [2021-11-21 01:11:59,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:11:59,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:11:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -843958995, now seen corresponding path program 1 times [2021-11-21 01:11:59,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534263191] [2021-11-21 01:11:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:59,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2021-11-21 01:11:59,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534263191] [2021-11-21 01:11:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534263191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:59,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:59,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:11:59,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510968296] [2021-11-21 01:11:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:59,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:11:59,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:11:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:11:59,504 INFO L87 Difference]: Start difference. First operand 3418 states and 4941 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:12:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:01,973 INFO L93 Difference]: Finished difference Result 3424 states and 4946 transitions. [2021-11-21 01:12:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 193 [2021-11-21 01:12:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:01,999 INFO L225 Difference]: With dead ends: 3424 [2021-11-21 01:12:01,999 INFO L226 Difference]: Without dead ends: 3422 [2021-11-21 01:12:02,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:02,003 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1451 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:02,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:12:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-11-21 01:12:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3422. [2021-11-21 01:12:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2000 states have (on average 1.289) internal successors, (2578), 2058 states have internal predecessors, (2578), 1185 states have call successors, (1185), 239 states have call predecessors, (1185), 234 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:12:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4944 transitions. [2021-11-21 01:12:02,252 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4944 transitions. Word has length 193 [2021-11-21 01:12:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:02,253 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4944 transitions. [2021-11-21 01:12:02,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:12:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4944 transitions. [2021-11-21 01:12:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-21 01:12:02,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:02,258 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 4, 4, 4, 3, 3, 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] [2021-11-21 01:12:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:12:02,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1467016548, now seen corresponding path program 1 times [2021-11-21 01:12:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377873067] [2021-11-21 01:12:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:02,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-11-21 01:12:02,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377873067] [2021-11-21 01:12:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377873067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:02,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633647087] [2021-11-21 01:12:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:02,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:02,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:02,533 INFO L87 Difference]: Start difference. First operand 3422 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:12:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:04,370 INFO L93 Difference]: Finished difference Result 3428 states and 4949 transitions. [2021-11-21 01:12:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:04,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 198 [2021-11-21 01:12:04,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:04,394 INFO L225 Difference]: With dead ends: 3428 [2021-11-21 01:12:04,394 INFO L226 Difference]: Without dead ends: 3426 [2021-11-21 01:12:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:04,397 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1451 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:04,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:12:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-11-21 01:12:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3426. [2021-11-21 01:12:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 2003 states have (on average 1.288567149276086) internal successors, (2581), 2061 states have internal predecessors, (2581), 1185 states have call successors, (1185), 240 states have call predecessors, (1185), 235 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:12:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4947 transitions. [2021-11-21 01:12:04,685 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4947 transitions. Word has length 198 [2021-11-21 01:12:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:04,686 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4947 transitions. [2021-11-21 01:12:04,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 01:12:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4947 transitions. [2021-11-21 01:12:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-21 01:12:04,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:04,693 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:04,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:12:04,693 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:04,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1019377243, now seen corresponding path program 1 times [2021-11-21 01:12:04,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:04,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954804144] [2021-11-21 01:12:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:04,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-11-21 01:12:04,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954804144] [2021-11-21 01:12:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954804144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:04,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:04,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:04,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284720334] [2021-11-21 01:12:04,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:04,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:04,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:04,970 INFO L87 Difference]: Start difference. First operand 3426 states and 4947 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:12:07,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:12:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:08,155 INFO L93 Difference]: Finished difference Result 3432 states and 4952 transitions. [2021-11-21 01:12:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 207 [2021-11-21 01:12:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:08,171 INFO L225 Difference]: With dead ends: 3432 [2021-11-21 01:12:08,171 INFO L226 Difference]: Without dead ends: 3430 [2021-11-21 01:12:08,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:08,174 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:08,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-21 01:12:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-21 01:12:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3430. [2021-11-21 01:12:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 2006 states have (on average 1.2881355932203389) internal successors, (2584), 2064 states have internal predecessors, (2584), 1185 states have call successors, (1185), 241 states have call predecessors, (1185), 236 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:12:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 4950 transitions. [2021-11-21 01:12:08,482 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 4950 transitions. Word has length 207 [2021-11-21 01:12:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:08,483 INFO L470 AbstractCegarLoop]: Abstraction has 3430 states and 4950 transitions. [2021-11-21 01:12:08,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:12:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 4950 transitions. [2021-11-21 01:12:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-21 01:12:08,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:08,494 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 6, 5, 5, 4, 4, 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] [2021-11-21 01:12:08,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:12:08,494 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 617989828, now seen corresponding path program 1 times [2021-11-21 01:12:08,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621061409] [2021-11-21 01:12:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:08,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-21 01:12:08,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621061409] [2021-11-21 01:12:08,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621061409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:08,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:08,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:08,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778479189] [2021-11-21 01:12:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:08,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:08,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:08,793 INFO L87 Difference]: Start difference. First operand 3430 states and 4950 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:12:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:11,339 INFO L93 Difference]: Finished difference Result 3436 states and 4955 transitions. [2021-11-21 01:12:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 208 [2021-11-21 01:12:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:11,355 INFO L225 Difference]: With dead ends: 3436 [2021-11-21 01:12:11,355 INFO L226 Difference]: Without dead ends: 3434 [2021-11-21 01:12:11,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:11,358 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1451 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:11,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:12:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-11-21 01:12:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3434. [2021-11-21 01:12:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 2009 states have (on average 1.2877053260328521) internal successors, (2587), 2067 states have internal predecessors, (2587), 1185 states have call successors, (1185), 242 states have call predecessors, (1185), 237 states have return successors, (1181), 1162 states have call predecessors, (1181), 1181 states have call successors, (1181) [2021-11-21 01:12:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 4953 transitions. [2021-11-21 01:12:11,600 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 4953 transitions. Word has length 208 [2021-11-21 01:12:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:11,601 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 4953 transitions. [2021-11-21 01:12:11,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:12:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 4953 transitions. [2021-11-21 01:12:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-21 01:12:11,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:11,608 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 7, 6, 6, 5, 5, 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] [2021-11-21 01:12:11,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:12:11,608 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -588515624, now seen corresponding path program 1 times [2021-11-21 01:12:11,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807318233] [2021-11-21 01:12:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:11,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-11-21 01:12:11,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807318233] [2021-11-21 01:12:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807318233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:11,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:11,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:11,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837678225] [2021-11-21 01:12:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:11,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:11,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:11,886 INFO L87 Difference]: Start difference. First operand 3434 states and 4953 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:12:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:13,785 INFO L93 Difference]: Finished difference Result 3548 states and 5070 transitions. [2021-11-21 01:12:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:13,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 216 [2021-11-21 01:12:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:13,796 INFO L225 Difference]: With dead ends: 3548 [2021-11-21 01:12:13,797 INFO L226 Difference]: Without dead ends: 3546 [2021-11-21 01:12:13,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:13,799 INFO L933 BasicCegarLoop]: 1316 mSDtfsCounter, 1244 mSDsluCounter, 3279 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 4159 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:13,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 4159 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:12:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-11-21 01:12:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3546. [2021-11-21 01:12:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2070 states have (on average 1.2821256038647344) internal successors, (2654), 2132 states have internal predecessors, (2654), 1209 states have call successors, (1209), 269 states have call predecessors, (1209), 264 states have return successors, (1205), 1186 states have call predecessors, (1205), 1205 states have call successors, (1205) [2021-11-21 01:12:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5068 transitions. [2021-11-21 01:12:14,037 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5068 transitions. Word has length 216 [2021-11-21 01:12:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:14,038 INFO L470 AbstractCegarLoop]: Abstraction has 3546 states and 5068 transitions. [2021-11-21 01:12:14,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:12:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5068 transitions. [2021-11-21 01:12:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-21 01:12:14,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:14,045 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 8, 7, 7, 5, 5, 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] [2021-11-21 01:12:14,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:12:14,046 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:14,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1453835094, now seen corresponding path program 1 times [2021-11-21 01:12:14,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:14,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600966267] [2021-11-21 01:12:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:14,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2021-11-21 01:12:14,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600966267] [2021-11-21 01:12:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600966267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:14,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819436389] [2021-11-21 01:12:14,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:14,296 INFO L87 Difference]: Start difference. First operand 3546 states and 5068 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:12:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:16,138 INFO L93 Difference]: Finished difference Result 3552 states and 5073 transitions. [2021-11-21 01:12:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 222 [2021-11-21 01:12:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:16,153 INFO L225 Difference]: With dead ends: 3552 [2021-11-21 01:12:16,153 INFO L226 Difference]: Without dead ends: 3550 [2021-11-21 01:12:16,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:16,156 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:16,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:12:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-11-21 01:12:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3550. [2021-11-21 01:12:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 2073 states have (on average 1.281717317896768) internal successors, (2657), 2135 states have internal predecessors, (2657), 1209 states have call successors, (1209), 270 states have call predecessors, (1209), 265 states have return successors, (1205), 1186 states have call predecessors, (1205), 1205 states have call successors, (1205) [2021-11-21 01:12:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5071 transitions. [2021-11-21 01:12:16,476 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5071 transitions. Word has length 222 [2021-11-21 01:12:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:16,476 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 5071 transitions. [2021-11-21 01:12:16,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 01:12:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5071 transitions. [2021-11-21 01:12:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-21 01:12:16,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:16,483 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 9, 8, 8, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:16,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:12:16,483 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1236516965, now seen corresponding path program 1 times [2021-11-21 01:12:16,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182655971] [2021-11-21 01:12:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:16,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-11-21 01:12:16,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182655971] [2021-11-21 01:12:16,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182655971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:16,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:16,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:16,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786436737] [2021-11-21 01:12:16,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:16,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:16,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:16,717 INFO L87 Difference]: Start difference. First operand 3550 states and 5071 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:12:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:18,743 INFO L93 Difference]: Finished difference Result 3556 states and 5076 transitions. [2021-11-21 01:12:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 227 [2021-11-21 01:12:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:18,758 INFO L225 Difference]: With dead ends: 3556 [2021-11-21 01:12:18,759 INFO L226 Difference]: Without dead ends: 3554 [2021-11-21 01:12:18,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:18,761 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:18,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1453 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:12:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-11-21 01:12:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 3554. [2021-11-21 01:12:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2076 states have (on average 1.28131021194605) internal successors, (2660), 2138 states have internal predecessors, (2660), 1209 states have call successors, (1209), 271 states have call predecessors, (1209), 266 states have return successors, (1205), 1186 states have call predecessors, (1205), 1205 states have call successors, (1205) [2021-11-21 01:12:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5074 transitions. [2021-11-21 01:12:19,027 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5074 transitions. Word has length 227 [2021-11-21 01:12:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:19,028 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 5074 transitions. [2021-11-21 01:12:19,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 01:12:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5074 transitions. [2021-11-21 01:12:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-21 01:12:19,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:19,035 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 10, 9, 9, 5, 5, 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] [2021-11-21 01:12:19,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:12:19,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1947156938, now seen corresponding path program 1 times [2021-11-21 01:12:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262656684] [2021-11-21 01:12:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-21 01:12:19,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262656684] [2021-11-21 01:12:19,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262656684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:19,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:19,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:19,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098724996] [2021-11-21 01:12:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:19,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:19,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:19,269 INFO L87 Difference]: Start difference. First operand 3554 states and 5074 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:12:21,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:12:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:22,439 INFO L93 Difference]: Finished difference Result 3560 states and 5079 transitions. [2021-11-21 01:12:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 232 [2021-11-21 01:12:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:22,453 INFO L225 Difference]: With dead ends: 3560 [2021-11-21 01:12:22,454 INFO L226 Difference]: Without dead ends: 3558 [2021-11-21 01:12:22,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:22,456 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:22,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-21 01:12:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-11-21 01:12:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3558. [2021-11-21 01:12:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2079 states have (on average 1.280904280904281) internal successors, (2663), 2141 states have internal predecessors, (2663), 1209 states have call successors, (1209), 272 states have call predecessors, (1209), 267 states have return successors, (1205), 1186 states have call predecessors, (1205), 1205 states have call successors, (1205) [2021-11-21 01:12:22,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5077 transitions. [2021-11-21 01:12:22,726 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5077 transitions. Word has length 232 [2021-11-21 01:12:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:22,727 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 5077 transitions. [2021-11-21 01:12:22,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:12:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5077 transitions. [2021-11-21 01:12:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-21 01:12:22,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:22,735 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 11, 10, 10, 5, 5, 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] [2021-11-21 01:12:22,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:12:22,735 INFO L402 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)] === [2021-11-21 01:12:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 804061080, now seen corresponding path program 1 times [2021-11-21 01:12:22,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:22,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117219145] [2021-11-21 01:12:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:22,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-21 01:12:22,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117219145] [2021-11-21 01:12:22,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117219145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:22,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:22,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:22,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025099297] [2021-11-21 01:12:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:22,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:22,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:22,963 INFO L87 Difference]: Start difference. First operand 3558 states and 5077 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:12:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:24,712 INFO L93 Difference]: Finished difference Result 3564 states and 5082 transitions. [2021-11-21 01:12:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 236 [2021-11-21 01:12:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:24,779 INFO L225 Difference]: With dead ends: 3564 [2021-11-21 01:12:24,779 INFO L226 Difference]: Without dead ends: 3560 [2021-11-21 01:12:24,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:24,781 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 1450 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:24,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 3893 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:12:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-11-21 01:12:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 3560. [2021-11-21 01:12:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 2081 states have (on average 1.280153772224892) internal successors, (2664), 2142 states have internal predecessors, (2664), 1209 states have call successors, (1209), 273 states have call predecessors, (1209), 267 states have return successors, (1205), 1186 states have call predecessors, (1205), 1205 states have call successors, (1205) [2021-11-21 01:12:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 5078 transitions. [2021-11-21 01:12:25,058 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 5078 transitions. Word has length 236 [2021-11-21 01:12:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:25,059 INFO L470 AbstractCegarLoop]: Abstraction has 3560 states and 5078 transitions. [2021-11-21 01:12:25,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 01:12:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 5078 transitions. [2021-11-21 01:12:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-21 01:12:25,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:25,067 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 12, 12, 12, 11, 11, 4, 4, 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] [2021-11-21 01:12:25,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:12:25,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash 109656804, now seen corresponding path program 1 times [2021-11-21 01:12:25,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:25,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240991002] [2021-11-21 01:12:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:25,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-21 01:12:25,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240991002] [2021-11-21 01:12:25,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240991002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:25,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:25,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:12:25,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345142699] [2021-11-21 01:12:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:25,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:12:25,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:12:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:12:25,318 INFO L87 Difference]: Start difference. First operand 3560 states and 5078 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:12:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:27,210 INFO L93 Difference]: Finished difference Result 3560 states and 5078 transitions. [2021-11-21 01:12:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:12:27,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 238 [2021-11-21 01:12:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:27,220 INFO L225 Difference]: With dead ends: 3560 [2021-11-21 01:12:27,220 INFO L226 Difference]: Without dead ends: 3479 [2021-11-21 01:12:27,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:12:27,223 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 1447 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:27,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 3890 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:12:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-11-21 01:12:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 3479. [2021-11-21 01:12:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 2041 states have (on average 1.282704556589907) internal successors, (2618), 2096 states have internal predecessors, (2618), 1182 states have call successors, (1182), 258 states have call predecessors, (1182), 254 states have return successors, (1182), 1166 states have call predecessors, (1182), 1182 states have call successors, (1182) [2021-11-21 01:12:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 4982 transitions. [2021-11-21 01:12:27,634 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 4982 transitions. Word has length 238 [2021-11-21 01:12:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:27,635 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 4982 transitions. [2021-11-21 01:12:27,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 01:12:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 4982 transitions. [2021-11-21 01:12:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-21 01:12:27,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:27,643 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 12, 12, 12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:27,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:12:27,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash -95777671, now seen corresponding path program 1 times [2021-11-21 01:12:27,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:27,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056136875] [2021-11-21 01:12:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:27,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2021-11-21 01:12:27,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056136875] [2021-11-21 01:12:27,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056136875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:27,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:27,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:12:27,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754092767] [2021-11-21 01:12:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:27,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:12:27,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:12:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:27,919 INFO L87 Difference]: Start difference. First operand 3479 states and 4982 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:12:30,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:12:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:30,733 INFO L93 Difference]: Finished difference Result 5949 states and 8505 transitions. [2021-11-21 01:12:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:12:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 247 [2021-11-21 01:12:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:30,743 INFO L225 Difference]: With dead ends: 5949 [2021-11-21 01:12:30,744 INFO L226 Difference]: Without dead ends: 2513 [2021-11-21 01:12:30,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:30,758 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 716 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:30,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2909 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 01:12:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-11-21 01:12:30,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2507. [2021-11-21 01:12:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 1501 states have (on average 1.2698201199200534) internal successors, (1906), 1538 states have internal predecessors, (1906), 815 states have call successors, (815), 191 states have call predecessors, (815), 189 states have return successors, (815), 804 states have call predecessors, (815), 815 states have call successors, (815) [2021-11-21 01:12:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 3536 transitions. [2021-11-21 01:12:30,956 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 3536 transitions. Word has length 247 [2021-11-21 01:12:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:30,957 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 3536 transitions. [2021-11-21 01:12:30,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-21 01:12:30,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 3536 transitions. [2021-11-21 01:12:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-21 01:12:30,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:30,962 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 12, 12, 12, 12, 12, 12, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:30,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:12:30,963 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2045268328, now seen corresponding path program 1 times [2021-11-21 01:12:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495510138] [2021-11-21 01:12:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-21 01:12:31,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495510138] [2021-11-21 01:12:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495510138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:31,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:12:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491799752] [2021-11-21 01:12:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:12:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:12:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:31,173 INFO L87 Difference]: Start difference. First operand 2507 states and 3536 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 01:12:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:33,072 INFO L93 Difference]: Finished difference Result 5577 states and 7886 transitions. [2021-11-21 01:12:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:12:33,073 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), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 294 [2021-11-21 01:12:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:33,083 INFO L225 Difference]: With dead ends: 5577 [2021-11-21 01:12:33,084 INFO L226 Difference]: Without dead ends: 3172 [2021-11-21 01:12:33,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:33,092 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 724 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 3071 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:33,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 3071 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:12:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-11-21 01:12:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3166. [2021-11-21 01:12:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 1899 states have (on average 1.2669826224328593) internal successors, (2406), 1945 states have internal predecessors, (2406), 1020 states have call successors, (1020), 247 states have call predecessors, (1020), 245 states have return successors, (1020), 1006 states have call predecessors, (1020), 1020 states have call successors, (1020) [2021-11-21 01:12:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 4446 transitions. [2021-11-21 01:12:33,356 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 4446 transitions. Word has length 294 [2021-11-21 01:12:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:33,357 INFO L470 AbstractCegarLoop]: Abstraction has 3166 states and 4446 transitions. [2021-11-21 01:12:33,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-21 01:12:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 4446 transitions. [2021-11-21 01:12:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-21 01:12:33,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:33,363 INFO L514 BasicCegarLoop]: trace histogram [18, 14, 12, 12, 12, 12, 12, 12, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:33,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:12:33,364 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2017342934, now seen corresponding path program 1 times [2021-11-21 01:12:33,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:33,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718316824] [2021-11-21 01:12:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:33,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2021-11-21 01:12:33,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:33,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718316824] [2021-11-21 01:12:33,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718316824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:33,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:33,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:12:33,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082121986] [2021-11-21 01:12:33,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:33,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:12:33,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:12:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:33,614 INFO L87 Difference]: Start difference. First operand 3166 states and 4446 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:12:36,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:12:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:37,175 INFO L93 Difference]: Finished difference Result 6242 states and 8809 transitions. [2021-11-21 01:12:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:12:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 338 [2021-11-21 01:12:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:37,188 INFO L225 Difference]: With dead ends: 6242 [2021-11-21 01:12:37,188 INFO L226 Difference]: Without dead ends: 3178 [2021-11-21 01:12:37,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:12:37,200 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 1 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:37,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2512 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-21 01:12:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-11-21 01:12:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 3170. [2021-11-21 01:12:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 1903 states have (on average 1.2664214398318445) internal successors, (2410), 1949 states have internal predecessors, (2410), 1020 states have call successors, (1020), 247 states have call predecessors, (1020), 245 states have return successors, (1020), 1006 states have call predecessors, (1020), 1020 states have call successors, (1020) [2021-11-21 01:12:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4450 transitions. [2021-11-21 01:12:37,455 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4450 transitions. Word has length 338 [2021-11-21 01:12:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:37,456 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 4450 transitions. [2021-11-21 01:12:37,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-21 01:12:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4450 transitions. [2021-11-21 01:12:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-21 01:12:37,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:37,464 INFO L514 BasicCegarLoop]: trace histogram [18, 15, 12, 12, 12, 12, 12, 12, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:37,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:12:37,465 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 01:12:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash 601661302, now seen corresponding path program 1 times [2021-11-21 01:12:37,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:37,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265800038] [2021-11-21 01:12:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:37,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-21 01:12:37,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265800038] [2021-11-21 01:12:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265800038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:12:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634622149] [2021-11-21 01:12:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:37,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:12:37,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:12:37,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:12:37,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78e32632-185b-417a-8d23-4d89432151ec/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:12:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 4387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:12:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:12:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 106 proven. 1 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-11-21 01:12:39,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:12:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-21 01:12:40,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634622149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:12:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59929223] [2021-11-21 01:12:40,359 INFO L159 IcfgInterpreter]: Started Sifa with 176 locations of interest [2021-11-21 01:12:40,360 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:12:40,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:12:40,370 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:12:40,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:13:48,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-21 01:14:00,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-21 01:15:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21