./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-dnet.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba --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 fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:13:16,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:13:16,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:13:16,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:13:16,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:13:16,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:13:16,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:13:16,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:13:16,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:13:16,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:13:16,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:13:16,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:13:16,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:13:16,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:13:16,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:13:16,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:13:16,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:13:16,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:13:16,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:13:16,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:13:16,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:13:16,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:13:16,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:13:16,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:13:16,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:13:16,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:13:16,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:13:16,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:13:16,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:13:16,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:13:16,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:13:16,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:13:16,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:13:16,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:13:16,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:13:16,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:13:16,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:13:16,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:13:16,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:13:16,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:13:16,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:13:16,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:13:16,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:13:16,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:13:16,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:13:16,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:13:16,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:13:16,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:13:16,505 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:13:16,506 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:13:16,506 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:13:16,506 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:13:16,506 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:13:16,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:13:16,507 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:13:16,507 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:13:16,507 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:13:16,507 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:13:16,507 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:13:16,507 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:13:16,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:13:16,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:13:16,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:13:16,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:13:16,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:13:16,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:13:16,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:13:16,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:13:16,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:13:16,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:13:16,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 [2022-11-22 01:13:16,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:13:16,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:13:16,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:13:16,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:13:16,833 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:13:16,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2022-11-22 01:13:19,858 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:13:20,438 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:13:20,438 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2022-11-22 01:13:20,496 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/data/072437e96/afde1fbab5ab418e8f30828dc94dc568/FLAG8567e8a63 [2022-11-22 01:13:20,515 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/data/072437e96/afde1fbab5ab418e8f30828dc94dc568 [2022-11-22 01:13:20,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:13:20,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:13:20,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:13:20,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:13:20,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:13:20,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:13:20" (1/1) ... [2022-11-22 01:13:20,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f331a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:20, skipping insertion in model container [2022-11-22 01:13:20,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:13:20" (1/1) ... [2022-11-22 01:13:20,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:13:20,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:13:23,365 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2022-11-22 01:13:23,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2022-11-22 01:13:23,375 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2022-11-22 01:13:23,375 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2022-11-22 01:13:23,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:13:23,431 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:13:23,838 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2022-11-22 01:13:23,839 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2022-11-22 01:13:23,840 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2022-11-22 01:13:23,840 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2022-11-22 01:13:23,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:13:24,068 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:13:24,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24 WrapperNode [2022-11-22 01:13:24,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:13:24,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:13:24,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:13:24,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:13:24,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,361 INFO L138 Inliner]: procedures = 411, calls = 1985, calls flagged for inlining = 210, calls inlined = 187, statements flattened = 4396 [2022-11-22 01:13:24,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:13:24,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:13:24,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:13:24,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:13:24,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:13:24,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:13:24,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:13:24,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:13:24,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (1/1) ... [2022-11-22 01:13:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:13:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:13:24,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:13:24,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2894a36-521f-4fa5-b747-22cd37905ec6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:13:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_probe [2022-11-22 01:13:24,799 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_probe [2022-11-22 01:13:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-22 01:13:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-22 01:13:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 01:13:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 01:13:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-22 01:13:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-22 01:13:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-22 01:13:24,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-22 01:13:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-22 01:13:24,801 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-22 01:13:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2022-11-22 01:13:24,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2022-11-22 01:13:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure __dnet_set_hwaddr [2022-11-22 01:13:24,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __dnet_set_hwaddr [2022-11-22 01:13:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-22 01:13:24,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-22 01:13:24,803 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-22 01:13:24,803 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-22 01:13:24,804 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-22 01:13:24,804 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-22 01:13:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-22 01:13:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-22 01:13:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-22 01:13:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-22 01:13:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:13:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-22 01:13:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-22 01:13:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-22 01:13:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-22 01:13:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-22 01:13:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2022-11-22 01:13:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2022-11-22 01:13:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-22 01:13:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-22 01:13:24,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-22 01:13:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:13:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-22 01:13:24,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-22 01:13:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_reset_hw [2022-11-22 01:13:24,810 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_reset_hw [2022-11-22 01:13:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-22 01:13:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-22 01:13:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:13:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-22 01:13:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-22 01:13:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-22 01:13:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-22 01:13:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-22 01:13:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-22 01:13:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:13:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-22 01:13:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-22 01:13:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-22 01:13:24,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-22 01:13:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-22 01:13:24,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-22 01:13:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:13:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-22 01:13:24,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-22 01:13:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-22 01:13:24,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-22 01:13:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-22 01:13:24,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-22 01:13:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-22 01:13:24,814 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-22 01:13:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-22 01:13:24,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-22 01:13:24,815 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-22 01:13:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-22 01:13:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-22 01:13:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-22 01:13:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-22 01:13:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-22 01:13:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:13:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:13:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-22 01:13:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-22 01:13:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_free [2022-11-22 01:13:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_free [2022-11-22 01:13:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-22 01:13:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 01:13:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-22 01:13:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-22 01:13:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_unregister [2022-11-22 01:13:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_unregister [2022-11-22 01:13:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-22 01:13:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-22 01:13:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_dnet [2022-11-22 01:13:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_dnet [2022-11-22 01:13:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-22 01:13:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-22 01:13:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_readw_mac [2022-11-22 01:13:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_readw_mac [2022-11-22 01:13:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:13:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:13:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:13:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-22 01:13:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-22 01:13:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-22 01:13:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-22 01:13:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-22 01:13:24,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-22 01:13:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2022-11-22 01:13:24,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2022-11-22 01:13:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_close [2022-11-22 01:13:24,828 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_close [2022-11-22 01:13:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2022-11-22 01:13:24,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2022-11-22 01:13:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_handle_link_change [2022-11-22 01:13:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_handle_link_change [2022-11-22 01:13:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-22 01:13:24,831 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-22 01:13:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-22 01:13:24,838 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-22 01:13:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_writew_mac [2022-11-22 01:13:24,838 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_writew_mac [2022-11-22 01:13:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-22 01:13:24,838 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-22 01:13:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-22 01:13:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-22 01:13:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:13:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-22 01:13:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-22 01:13:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_remove [2022-11-22 01:13:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_remove [2022-11-22 01:13:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-22 01:13:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-22 01:13:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_open [2022-11-22 01:13:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_open [2022-11-22 01:13:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure phy_connect [2022-11-22 01:13:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_connect [2022-11-22 01:13:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-22 01:13:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-22 01:13:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-22 01:13:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-22 01:13:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:13:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-22 01:13:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-22 01:13:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-22 01:13:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-22 01:13:25,669 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:13:25,676 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:13:26,689 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-22 01:13:32,631 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-22 01:13:32,731 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:13:33,777 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:13:33,778 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:13:33,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:13:33 BoogieIcfgContainer [2022-11-22 01:13:33,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:13:33,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:13:33,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:13:33,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:13:33,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:13:20" (1/3) ... [2022-11-22 01:13:33,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e7b2a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:13:33, skipping insertion in model container [2022-11-22 01:13:33,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:13:24" (2/3) ... [2022-11-22 01:13:33,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e7b2a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:13:33, skipping insertion in model container [2022-11-22 01:13:33,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:13:33" (3/3) ... [2022-11-22 01:13:33,802 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2022-11-22 01:13:33,824 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:13:33,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-22 01:13:33,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:13:33,909 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53879cf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:13:33,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-22 01:13:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 971 states, 582 states have (on average 1.3075601374570447) internal successors, (761), 595 states have internal predecessors, (761), 324 states have call successors, (324), 63 states have call predecessors, (324), 62 states have return successors, (317), 315 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-22 01:13:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 01:13:33,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:33,935 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:13:33,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:13:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:33,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1541342712, now seen corresponding path program 1 times [2022-11-22 01:13:33,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195678850] [2022-11-22 01:13:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:33,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:13:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:13:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 01:13:34,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:13:34,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195678850] [2022-11-22 01:13:34,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195678850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:13:34,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:13:34,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:13:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119047535] [2022-11-22 01:13:34,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:13:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:13:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:34,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:13:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:35,002 INFO L87 Difference]: Start difference. First operand has 971 states, 582 states have (on average 1.3075601374570447) internal successors, (761), 595 states have internal predecessors, (761), 324 states have call successors, (324), 63 states have call predecessors, (324), 62 states have return successors, (317), 315 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:37,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:13:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:13:40,598 INFO L93 Difference]: Finished difference Result 2752 states and 4009 transitions. [2022-11-22 01:13:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:13:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2022-11-22 01:13:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:13:40,637 INFO L225 Difference]: With dead ends: 2752 [2022-11-22 01:13:40,637 INFO L226 Difference]: Without dead ends: 1790 [2022-11-22 01:13:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:40,654 INFO L413 NwaCegarLoop]: 1406 mSDtfsCounter, 1225 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:13:40,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2521 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-22 01:13:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-22 01:13:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1786. [2022-11-22 01:13:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1090 states have (on average 1.3073394495412844) internal successors, (1425), 1114 states have internal predecessors, (1425), 572 states have call successors, (572), 122 states have call predecessors, (572), 121 states have return successors, (569), 565 states have call predecessors, (569), 569 states have call successors, (569) [2022-11-22 01:13:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2566 transitions. [2022-11-22 01:13:40,881 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2566 transitions. Word has length 117 [2022-11-22 01:13:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:13:40,883 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2566 transitions. [2022-11-22 01:13:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2566 transitions. [2022-11-22 01:13:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-22 01:13:40,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:40,894 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:13:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:13:40,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:13:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash -368516744, now seen corresponding path program 1 times [2022-11-22 01:13:40,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:40,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010607987] [2022-11-22 01:13:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:40,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:13:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:13:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 01:13:41,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:13:41,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010607987] [2022-11-22 01:13:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010607987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:13:41,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:13:41,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:13:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970947059] [2022-11-22 01:13:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:13:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:13:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:13:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:41,414 INFO L87 Difference]: Start difference. First operand 1786 states and 2566 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:43,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:13:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:13:47,513 INFO L93 Difference]: Finished difference Result 5120 states and 7439 transitions. [2022-11-22 01:13:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:13:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2022-11-22 01:13:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:13:47,543 INFO L225 Difference]: With dead ends: 5120 [2022-11-22 01:13:47,543 INFO L226 Difference]: Without dead ends: 3355 [2022-11-22 01:13:47,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:47,555 INFO L413 NwaCegarLoop]: 1495 mSDtfsCounter, 1180 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 2623 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:13:47,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 2623 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 530 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-22 01:13:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2022-11-22 01:13:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3326. [2022-11-22 01:13:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 2051 states have (on average 1.3154558751828376) internal successors, (2698), 2101 states have internal predecessors, (2698), 1033 states have call successors, (1033), 242 states have call predecessors, (1033), 239 states have return successors, (1130), 1012 states have call predecessors, (1130), 1030 states have call successors, (1130) [2022-11-22 01:13:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4861 transitions. [2022-11-22 01:13:47,899 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4861 transitions. Word has length 119 [2022-11-22 01:13:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:13:47,901 INFO L495 AbstractCegarLoop]: Abstraction has 3326 states and 4861 transitions. [2022-11-22 01:13:47,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4861 transitions. [2022-11-22 01:13:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 01:13:47,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:47,912 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:13:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:13:47,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:13:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2018003973, now seen corresponding path program 1 times [2022-11-22 01:13:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180340987] [2022-11-22 01:13:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:13:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:13:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 01:13:48,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:13:48,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180340987] [2022-11-22 01:13:48,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180340987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:13:48,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:13:48,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:13:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107556353] [2022-11-22 01:13:48,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:13:48,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:13:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:13:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:48,310 INFO L87 Difference]: Start difference. First operand 3326 states and 4861 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:50,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:13:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:13:54,492 INFO L93 Difference]: Finished difference Result 9318 states and 13506 transitions. [2022-11-22 01:13:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:13:54,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2022-11-22 01:13:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:13:54,538 INFO L225 Difference]: With dead ends: 9318 [2022-11-22 01:13:54,539 INFO L226 Difference]: Without dead ends: 6013 [2022-11-22 01:13:54,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:54,558 INFO L413 NwaCegarLoop]: 1495 mSDtfsCounter, 1012 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:13:54,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 2560 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 620 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-22 01:13:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2022-11-22 01:13:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 5980. [2022-11-22 01:13:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 3649 states have (on average 1.2863798300904357) internal successors, (4694), 3755 states have internal predecessors, (4694), 1863 states have call successors, (1863), 470 states have call predecessors, (1863), 465 states have return successors, (1966), 1814 states have call predecessors, (1966), 1860 states have call successors, (1966) [2022-11-22 01:13:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 8523 transitions. [2022-11-22 01:13:55,012 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 8523 transitions. Word has length 127 [2022-11-22 01:13:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:13:55,012 INFO L495 AbstractCegarLoop]: Abstraction has 5980 states and 8523 transitions. [2022-11-22 01:13:55,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 8523 transitions. [2022-11-22 01:13:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-22 01:13:55,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:55,016 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:13:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:13:55,016 INFO L420 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)] === [2022-11-22 01:13:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1599989390, now seen corresponding path program 1 times [2022-11-22 01:13:55,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:55,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362301683] [2022-11-22 01:13:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:13:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:13:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-22 01:13:55,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:13:55,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362301683] [2022-11-22 01:13:55,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362301683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:13:55,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:13:55,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:13:55,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45303379] [2022-11-22 01:13:55,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:13:55,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:13:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:55,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:13:55,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:13:55,224 INFO L87 Difference]: Start difference. First operand 5980 states and 8523 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:13:58,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:01,231 INFO L93 Difference]: Finished difference Result 16718 states and 24008 transitions. [2022-11-22 01:14:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 135 [2022-11-22 01:14:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:01,308 INFO L225 Difference]: With dead ends: 16718 [2022-11-22 01:14:01,308 INFO L226 Difference]: Without dead ends: 10759 [2022-11-22 01:14:01,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:01,339 INFO L413 NwaCegarLoop]: 1388 mSDtfsCounter, 1093 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:01,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 2493 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 532 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-22 01:14:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10759 states. [2022-11-22 01:14:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10759 to 10718. [2022-11-22 01:14:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10718 states, 6533 states have (on average 1.2713913975202817) internal successors, (8306), 6735 states have internal predecessors, (8306), 3303 states have call successors, (3303), 896 states have call predecessors, (3303), 879 states have return successors, (3818), 3178 states have call predecessors, (3818), 3300 states have call successors, (3818) [2022-11-22 01:14:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10718 states to 10718 states and 15427 transitions. [2022-11-22 01:14:02,147 INFO L78 Accepts]: Start accepts. Automaton has 10718 states and 15427 transitions. Word has length 135 [2022-11-22 01:14:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:02,149 INFO L495 AbstractCegarLoop]: Abstraction has 10718 states and 15427 transitions. [2022-11-22 01:14:02,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 01:14:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10718 states and 15427 transitions. [2022-11-22 01:14:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 01:14:02,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:02,155 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 10, 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] [2022-11-22 01:14:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:14:02,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2058910727, now seen corresponding path program 1 times [2022-11-22 01:14:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346878] [2022-11-22 01:14:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-11-22 01:14:02,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346878] [2022-11-22 01:14:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:02,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:02,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:14:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741246237] [2022-11-22 01:14:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:14:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:14:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:02,504 INFO L87 Difference]: Start difference. First operand 10718 states and 15427 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:14:05,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:08,497 INFO L93 Difference]: Finished difference Result 20208 states and 29118 transitions. [2022-11-22 01:14:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2022-11-22 01:14:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:08,553 INFO L225 Difference]: With dead ends: 20208 [2022-11-22 01:14:08,553 INFO L226 Difference]: Without dead ends: 9511 [2022-11-22 01:14:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:08,597 INFO L413 NwaCegarLoop]: 1970 mSDtfsCounter, 1179 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 3067 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 718 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-22 01:14:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2022-11-22 01:14:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 9479. [2022-11-22 01:14:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9479 states, 5883 states have (on average 1.2694203637599863) internal successors, (7468), 6072 states have internal predecessors, (7468), 2813 states have call successors, (2813), 793 states have call predecessors, (2813), 780 states have return successors, (3302), 2695 states have call predecessors, (3302), 2810 states have call successors, (3302) [2022-11-22 01:14:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 13583 transitions. [2022-11-22 01:14:09,178 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 13583 transitions. Word has length 146 [2022-11-22 01:14:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:09,179 INFO L495 AbstractCegarLoop]: Abstraction has 9479 states and 13583 transitions. [2022-11-22 01:14:09,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:14:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 13583 transitions. [2022-11-22 01:14:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-22 01:14:09,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:09,183 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:09,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:14:09,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -446865784, now seen corresponding path program 1 times [2022-11-22 01:14:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:09,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802079223] [2022-11-22 01:14:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-11-22 01:14:09,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802079223] [2022-11-22 01:14:09,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802079223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:09,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:09,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:09,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000031383] [2022-11-22 01:14:09,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:09,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:09,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:09,736 INFO L87 Difference]: Start difference. First operand 9479 states and 13583 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:14:13,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:18,388 INFO L93 Difference]: Finished difference Result 18828 states and 26993 transitions. [2022-11-22 01:14:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:14:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 155 [2022-11-22 01:14:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:18,491 INFO L225 Difference]: With dead ends: 18828 [2022-11-22 01:14:18,492 INFO L226 Difference]: Without dead ends: 18826 [2022-11-22 01:14:18,502 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:14:18,502 INFO L413 NwaCegarLoop]: 1395 mSDtfsCounter, 1248 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 5264 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:18,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 5264 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 01:14:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18826 states. [2022-11-22 01:14:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18826 to 18820. [2022-11-22 01:14:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18820 states, 11668 states have (on average 1.2713404182379158) internal successors, (14834), 12044 states have internal predecessors, (14834), 5588 states have call successors, (5588), 1587 states have call predecessors, (5588), 1561 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:14:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18820 states to 18820 states and 26988 transitions. [2022-11-22 01:14:19,604 INFO L78 Accepts]: Start accepts. Automaton has 18820 states and 26988 transitions. Word has length 155 [2022-11-22 01:14:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:19,605 INFO L495 AbstractCegarLoop]: Abstraction has 18820 states and 26988 transitions. [2022-11-22 01:14:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:14:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 18820 states and 26988 transitions. [2022-11-22 01:14:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-22 01:14:19,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:19,608 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:14:19,608 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1030665717, now seen corresponding path program 1 times [2022-11-22 01:14:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:19,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113204927] [2022-11-22 01:14:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-11-22 01:14:20,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113204927] [2022-11-22 01:14:20,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113204927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:20,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:20,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:20,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183225930] [2022-11-22 01:14:20,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:20,166 INFO L87 Difference]: Start difference. First operand 18820 states and 26988 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-22 01:14:23,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:28,859 INFO L93 Difference]: Finished difference Result 18832 states and 26996 transitions. [2022-11-22 01:14:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:14:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 160 [2022-11-22 01:14:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:28,964 INFO L225 Difference]: With dead ends: 18832 [2022-11-22 01:14:28,965 INFO L226 Difference]: Without dead ends: 18830 [2022-11-22 01:14:28,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:14:28,976 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1243 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:28,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-22 01:14:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2022-11-22 01:14:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 18824. [2022-11-22 01:14:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18824 states, 11671 states have (on average 1.271270670893668) internal successors, (14837), 12047 states have internal predecessors, (14837), 5588 states have call successors, (5588), 1588 states have call predecessors, (5588), 1562 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:14:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18824 states to 18824 states and 26991 transitions. [2022-11-22 01:14:30,165 INFO L78 Accepts]: Start accepts. Automaton has 18824 states and 26991 transitions. Word has length 160 [2022-11-22 01:14:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 18824 states and 26991 transitions. [2022-11-22 01:14:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-22 01:14:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18824 states and 26991 transitions. [2022-11-22 01:14:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-22 01:14:30,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:30,172 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 4, 4, 3, 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] [2022-11-22 01:14:30,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:14:30,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 264253480, now seen corresponding path program 1 times [2022-11-22 01:14:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182313924] [2022-11-22 01:14:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:30,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2022-11-22 01:14:30,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182313924] [2022-11-22 01:14:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182313924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:30,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:30,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256391588] [2022-11-22 01:14:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:30,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:30,655 INFO L87 Difference]: Start difference. First operand 18824 states and 26991 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (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) [2022-11-22 01:14:34,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:39,476 INFO L93 Difference]: Finished difference Result 18836 states and 26999 transitions. [2022-11-22 01:14:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:14:39,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (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 165 [2022-11-22 01:14:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:39,577 INFO L225 Difference]: With dead ends: 18836 [2022-11-22 01:14:39,578 INFO L226 Difference]: Without dead ends: 18834 [2022-11-22 01:14:39,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:14:39,589 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1243 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:39,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-11-22 01:14:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18834 states. [2022-11-22 01:14:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18834 to 18828. [2022-11-22 01:14:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18828 states, 11674 states have (on average 1.2712009593969504) internal successors, (14840), 12050 states have internal predecessors, (14840), 5588 states have call successors, (5588), 1589 states have call predecessors, (5588), 1563 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:14:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18828 states to 18828 states and 26994 transitions. [2022-11-22 01:14:40,888 INFO L78 Accepts]: Start accepts. Automaton has 18828 states and 26994 transitions. Word has length 165 [2022-11-22 01:14:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:40,889 INFO L495 AbstractCegarLoop]: Abstraction has 18828 states and 26994 transitions. [2022-11-22 01:14:40,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (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) [2022-11-22 01:14:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18828 states and 26994 transitions. [2022-11-22 01:14:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-22 01:14:40,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:40,893 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 6, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:14:40,894 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1618576898, now seen corresponding path program 1 times [2022-11-22 01:14:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705345112] [2022-11-22 01:14:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-11-22 01:14:41,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:41,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705345112] [2022-11-22 01:14:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705345112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:41,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:41,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:41,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827287374] [2022-11-22 01:14:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:41,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:41,378 INFO L87 Difference]: Start difference. First operand 18828 states and 26994 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-22 01:14:44,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:14:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:50,320 INFO L93 Difference]: Finished difference Result 18840 states and 27002 transitions. [2022-11-22 01:14:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:14:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 179 [2022-11-22 01:14:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:50,448 INFO L225 Difference]: With dead ends: 18840 [2022-11-22 01:14:50,449 INFO L226 Difference]: Without dead ends: 18838 [2022-11-22 01:14:50,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:14:50,464 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:50,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 01:14:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2022-11-22 01:14:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 18832. [2022-11-22 01:14:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 11677 states have (on average 1.2711312837201336) internal successors, (14843), 12053 states have internal predecessors, (14843), 5588 states have call successors, (5588), 1590 states have call predecessors, (5588), 1564 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:14:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 26997 transitions. [2022-11-22 01:14:51,799 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 26997 transitions. Word has length 179 [2022-11-22 01:14:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:51,800 INFO L495 AbstractCegarLoop]: Abstraction has 18832 states and 26997 transitions. [2022-11-22 01:14:51,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-22 01:14:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 26997 transitions. [2022-11-22 01:14:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-22 01:14:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:51,805 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:14:51,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:14:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 914097681, now seen corresponding path program 1 times [2022-11-22 01:14:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288648277] [2022-11-22 01:14:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-11-22 01:14:52,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288648277] [2022-11-22 01:14:52,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288648277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:52,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:52,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650861237] [2022-11-22 01:14:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:52,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:52,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:52,389 INFO L87 Difference]: Start difference. First operand 18832 states and 26997 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-22 01:14:55,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:01,431 INFO L93 Difference]: Finished difference Result 18844 states and 27005 transitions. [2022-11-22 01:15:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 184 [2022-11-22 01:15:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:01,554 INFO L225 Difference]: With dead ends: 18844 [2022-11-22 01:15:01,554 INFO L226 Difference]: Without dead ends: 18842 [2022-11-22 01:15:01,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:15:01,572 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-22 01:15:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18842 states. [2022-11-22 01:15:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18842 to 18836. [2022-11-22 01:15:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18836 states, 11680 states have (on average 1.2710616438356164) internal successors, (14846), 12056 states have internal predecessors, (14846), 5588 states have call successors, (5588), 1591 states have call predecessors, (5588), 1565 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:15:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18836 states to 18836 states and 27000 transitions. [2022-11-22 01:15:02,879 INFO L78 Accepts]: Start accepts. Automaton has 18836 states and 27000 transitions. Word has length 184 [2022-11-22 01:15:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:02,880 INFO L495 AbstractCegarLoop]: Abstraction has 18836 states and 27000 transitions. [2022-11-22 01:15:02,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-22 01:15:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18836 states and 27000 transitions. [2022-11-22 01:15:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-22 01:15:02,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:02,884 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 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] [2022-11-22 01:15:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:15:02,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:15:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1472155426, now seen corresponding path program 1 times [2022-11-22 01:15:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757119083] [2022-11-22 01:15:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2022-11-22 01:15:03,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757119083] [2022-11-22 01:15:03,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757119083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:03,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:03,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:15:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603037849] [2022-11-22 01:15:03,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:03,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:15:03,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:03,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:15:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:15:03,341 INFO L87 Difference]: Start difference. First operand 18836 states and 27000 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-22 01:15:06,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:11,873 INFO L93 Difference]: Finished difference Result 18848 states and 27008 transitions. [2022-11-22 01:15:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 189 [2022-11-22 01:15:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:11,970 INFO L225 Difference]: With dead ends: 18848 [2022-11-22 01:15:11,970 INFO L226 Difference]: Without dead ends: 18846 [2022-11-22 01:15:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:15:11,987 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-11-22 01:15:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2022-11-22 01:15:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 18840. [2022-11-22 01:15:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18840 states, 11683 states have (on average 1.2709920397158263) internal successors, (14849), 12059 states have internal predecessors, (14849), 5588 states have call successors, (5588), 1592 states have call predecessors, (5588), 1566 states have return successors, (6566), 5352 states have call predecessors, (6566), 5582 states have call successors, (6566) [2022-11-22 01:15:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18840 states to 18840 states and 27003 transitions. [2022-11-22 01:15:13,506 INFO L78 Accepts]: Start accepts. Automaton has 18840 states and 27003 transitions. Word has length 189 [2022-11-22 01:15:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:13,506 INFO L495 AbstractCegarLoop]: Abstraction has 18840 states and 27003 transitions. [2022-11-22 01:15:13,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-22 01:15:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18840 states and 27003 transitions. [2022-11-22 01:15:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-22 01:15:13,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:13,510 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:13,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:15:13,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:15:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -622572696, now seen corresponding path program 1 times [2022-11-22 01:15:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:13,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686932270] [2022-11-22 01:15:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:13,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-11-22 01:15:14,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686932270] [2022-11-22 01:15:14,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686932270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:14,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:14,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:15:14,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086070120] [2022-11-22 01:15:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:14,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:15:14,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:15:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:15:14,018 INFO L87 Difference]: Start difference. First operand 18840 states and 27003 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-22 01:15:17,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:22,702 INFO L93 Difference]: Finished difference Result 27401 states and 39112 transitions. [2022-11-22 01:15:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 185 [2022-11-22 01:15:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:22,836 INFO L225 Difference]: With dead ends: 27401 [2022-11-22 01:15:22,837 INFO L226 Difference]: Without dead ends: 27399 [2022-11-22 01:15:22,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:15:22,859 INFO L413 NwaCegarLoop]: 1363 mSDtfsCounter, 1070 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 5154 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:22,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 5154 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1030 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 01:15:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27399 states. [2022-11-22 01:15:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27399 to 27381. [2022-11-22 01:15:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27381 states, 16959 states have (on average 1.2696503331564362) internal successors, (21532), 17542 states have internal predecessors, (21532), 8047 states have call successors, (8047), 2445 states have call predecessors, (8047), 2372 states have return successors, (9514), 7627 states have call predecessors, (9514), 8038 states have call successors, (9514) [2022-11-22 01:15:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27381 states to 27381 states and 39093 transitions. [2022-11-22 01:15:24,673 INFO L78 Accepts]: Start accepts. Automaton has 27381 states and 39093 transitions. Word has length 185 [2022-11-22 01:15:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:24,673 INFO L495 AbstractCegarLoop]: Abstraction has 27381 states and 39093 transitions. [2022-11-22 01:15:24,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-22 01:15:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27381 states and 39093 transitions. [2022-11-22 01:15:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 01:15:24,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:24,677 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 8, 7, 7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:15:24,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:15:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash 203808834, now seen corresponding path program 1 times [2022-11-22 01:15:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509232047] [2022-11-22 01:15:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:24,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-11-22 01:15:25,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509232047] [2022-11-22 01:15:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509232047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:25,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:25,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:15:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951736813] [2022-11-22 01:15:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:15:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:15:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:15:25,149 INFO L87 Difference]: Start difference. First operand 27381 states and 39093 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:15:28,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:34,164 INFO L93 Difference]: Finished difference Result 27393 states and 39101 transitions. [2022-11-22 01:15:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 199 [2022-11-22 01:15:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:34,284 INFO L225 Difference]: With dead ends: 27393 [2022-11-22 01:15:34,284 INFO L226 Difference]: Without dead ends: 27391 [2022-11-22 01:15:34,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:15:34,302 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:34,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 01:15:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27391 states. [2022-11-22 01:15:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27391 to 27385. [2022-11-22 01:15:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27385 states, 16962 states have (on average 1.269602641197972) internal successors, (21535), 17545 states have internal predecessors, (21535), 8047 states have call successors, (8047), 2446 states have call predecessors, (8047), 2373 states have return successors, (9514), 7627 states have call predecessors, (9514), 8038 states have call successors, (9514) [2022-11-22 01:15:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27385 states to 27385 states and 39096 transitions. [2022-11-22 01:15:35,954 INFO L78 Accepts]: Start accepts. Automaton has 27385 states and 39096 transitions. Word has length 199 [2022-11-22 01:15:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:35,956 INFO L495 AbstractCegarLoop]: Abstraction has 27385 states and 39096 transitions. [2022-11-22 01:15:35,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:15:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 27385 states and 39096 transitions. [2022-11-22 01:15:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-22 01:15:35,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:35,963 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 10, 10, 10, 10, 10, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:15:35,964 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:15:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -658822599, now seen corresponding path program 1 times [2022-11-22 01:15:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:35,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119963361] [2022-11-22 01:15:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-22 01:15:36,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:36,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119963361] [2022-11-22 01:15:36,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119963361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:36,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:36,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:15:36,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218973196] [2022-11-22 01:15:36,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:36,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:15:36,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:36,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:15:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:15:36,262 INFO L87 Difference]: Start difference. First operand 27385 states and 39096 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 01:15:40,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:43,549 INFO L93 Difference]: Finished difference Result 65935 states and 94414 transitions. [2022-11-22 01:15:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:15:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 189 [2022-11-22 01:15:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:43,691 INFO L225 Difference]: With dead ends: 65935 [2022-11-22 01:15:43,691 INFO L226 Difference]: Without dead ends: 38632 [2022-11-22 01:15:43,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:15:43,773 INFO L413 NwaCegarLoop]: 2059 mSDtfsCounter, 1176 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:43,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 3152 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 740 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 01:15:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38632 states. [2022-11-22 01:15:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38632 to 38512. [2022-11-22 01:15:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38512 states, 24028 states have (on average 1.271183619111037) internal successors, (30544), 24854 states have internal predecessors, (30544), 11150 states have call successors, (11150), 3433 states have call predecessors, (11150), 3331 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2022-11-22 01:15:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38512 states to 38512 states and 55010 transitions. [2022-11-22 01:15:46,140 INFO L78 Accepts]: Start accepts. Automaton has 38512 states and 55010 transitions. Word has length 189 [2022-11-22 01:15:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:46,141 INFO L495 AbstractCegarLoop]: Abstraction has 38512 states and 55010 transitions. [2022-11-22 01:15:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 01:15:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38512 states and 55010 transitions. [2022-11-22 01:15:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-22 01:15:46,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:46,144 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 9, 8, 8, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:15:46,144 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:15:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -131960111, now seen corresponding path program 1 times [2022-11-22 01:15:46,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938430275] [2022-11-22 01:15:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2022-11-22 01:15:46,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938430275] [2022-11-22 01:15:46,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938430275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:46,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:46,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:15:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298376637] [2022-11-22 01:15:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:46,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:15:46,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:15:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:15:46,582 INFO L87 Difference]: Start difference. First operand 38512 states and 55010 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:15:50,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:15:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:56,256 INFO L93 Difference]: Finished difference Result 38524 states and 55018 transitions. [2022-11-22 01:15:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 204 [2022-11-22 01:15:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:56,388 INFO L225 Difference]: With dead ends: 38524 [2022-11-22 01:15:56,388 INFO L226 Difference]: Without dead ends: 38522 [2022-11-22 01:15:56,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:15:56,405 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:56,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-22 01:15:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38522 states. [2022-11-22 01:15:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38522 to 38516. [2022-11-22 01:15:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38516 states, 24031 states have (on average 1.271149764887021) internal successors, (30547), 24857 states have internal predecessors, (30547), 11150 states have call successors, (11150), 3434 states have call predecessors, (11150), 3332 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2022-11-22 01:15:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38516 states to 38516 states and 55013 transitions. [2022-11-22 01:15:58,553 INFO L78 Accepts]: Start accepts. Automaton has 38516 states and 55013 transitions. Word has length 204 [2022-11-22 01:15:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 38516 states and 55013 transitions. [2022-11-22 01:15:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-22 01:15:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 38516 states and 55013 transitions. [2022-11-22 01:15:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-22 01:15:58,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:58,555 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2022-11-22 01:15:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:15:58,556 INFO L420 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)] === [2022-11-22 01:15:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash 359915915, now seen corresponding path program 1 times [2022-11-22 01:15:58,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:58,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923659985] [2022-11-22 01:15:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:58,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2022-11-22 01:15:58,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:58,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923659985] [2022-11-22 01:15:58,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923659985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:58,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:58,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:15:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399117843] [2022-11-22 01:15:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:15:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:15:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:15:58,992 INFO L87 Difference]: Start difference. First operand 38516 states and 55013 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:16:02,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:16:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:08,869 INFO L93 Difference]: Finished difference Result 38528 states and 55021 transitions. [2022-11-22 01:16:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:16:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 200 [2022-11-22 01:16:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:09,002 INFO L225 Difference]: With dead ends: 38528 [2022-11-22 01:16:09,003 INFO L226 Difference]: Without dead ends: 38526 [2022-11-22 01:16:09,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:16:09,017 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1243 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:09,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 01:16:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38526 states. [2022-11-22 01:16:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38526 to 38520. [2022-11-22 01:16:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38520 states, 24034 states have (on average 1.2711159191145878) internal successors, (30550), 24860 states have internal predecessors, (30550), 11150 states have call successors, (11150), 3435 states have call predecessors, (11150), 3333 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2022-11-22 01:16:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38520 states to 38520 states and 55016 transitions. [2022-11-22 01:16:11,091 INFO L78 Accepts]: Start accepts. Automaton has 38520 states and 55016 transitions. Word has length 200 [2022-11-22 01:16:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:11,092 INFO L495 AbstractCegarLoop]: Abstraction has 38520 states and 55016 transitions. [2022-11-22 01:16:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-22 01:16:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 38520 states and 55016 transitions. [2022-11-22 01:16:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-22 01:16:11,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:11,095 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:11,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 01:16:11,096 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:16:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 221904177, now seen corresponding path program 1 times [2022-11-22 01:16:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117513067] [2022-11-22 01:16:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-22 01:16:11,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117513067] [2022-11-22 01:16:11,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117513067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:11,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:11,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:16:11,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373923818] [2022-11-22 01:16:11,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:11,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:16:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:16:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:16:11,505 INFO L87 Difference]: Start difference. First operand 38520 states and 55016 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-22 01:16:15,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:16:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:21,277 INFO L93 Difference]: Finished difference Result 38532 states and 55024 transitions. [2022-11-22 01:16:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:16:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 214 [2022-11-22 01:16:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:21,467 INFO L225 Difference]: With dead ends: 38532 [2022-11-22 01:16:21,467 INFO L226 Difference]: Without dead ends: 38528 [2022-11-22 01:16:21,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:16:21,487 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:21,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 5267 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 01:16:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38528 states. [2022-11-22 01:16:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38528 to 38522. [2022-11-22 01:16:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38522 states, 24036 states have (on average 1.2710517556997836) internal successors, (30551), 24861 states have internal predecessors, (30551), 11150 states have call successors, (11150), 3436 states have call predecessors, (11150), 3333 states have return successors, (13316), 10556 states have call predecessors, (13316), 11141 states have call successors, (13316) [2022-11-22 01:16:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38522 states to 38522 states and 55017 transitions. [2022-11-22 01:16:23,606 INFO L78 Accepts]: Start accepts. Automaton has 38522 states and 55017 transitions. Word has length 214 [2022-11-22 01:16:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:23,607 INFO L495 AbstractCegarLoop]: Abstraction has 38522 states and 55017 transitions. [2022-11-22 01:16:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-22 01:16:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38522 states and 55017 transitions. [2022-11-22 01:16:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-22 01:16:23,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:23,610 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 11, 11, 10, 10, 10, 10, 10, 10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 01:16:23,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:16:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash -42163349, now seen corresponding path program 1 times [2022-11-22 01:16:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032463389] [2022-11-22 01:16:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-11-22 01:16:24,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:24,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032463389] [2022-11-22 01:16:24,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032463389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:24,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:24,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:16:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746654716] [2022-11-22 01:16:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:16:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:16:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:16:24,016 INFO L87 Difference]: Start difference. First operand 38522 states and 55017 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-22 01:16:27,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:16:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:33,757 INFO L93 Difference]: Finished difference Result 38528 states and 55020 transitions. [2022-11-22 01:16:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:16:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (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 210 [2022-11-22 01:16:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:33,921 INFO L225 Difference]: With dead ends: 38528 [2022-11-22 01:16:33,921 INFO L226 Difference]: Without dead ends: 38342 [2022-11-22 01:16:33,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:16:33,937 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1239 mSDsluCounter, 3871 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 5269 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:33,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 5269 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 01:16:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38342 states. [2022-11-22 01:16:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38342 to 38338. [2022-11-22 01:16:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38338 states, 23974 states have (on average 1.2697505631100359) internal successors, (30441), 24752 states have internal predecessors, (30441), 11040 states have call successors, (11040), 3422 states have call predecessors, (11040), 3321 states have return successors, (13209), 10495 states have call predecessors, (13209), 11034 states have call successors, (13209) [2022-11-22 01:16:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38338 states to 38338 states and 54690 transitions. [2022-11-22 01:16:36,224 INFO L78 Accepts]: Start accepts. Automaton has 38338 states and 54690 transitions. Word has length 210 [2022-11-22 01:16:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:36,225 INFO L495 AbstractCegarLoop]: Abstraction has 38338 states and 54690 transitions. [2022-11-22 01:16:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-22 01:16:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 38338 states and 54690 transitions. [2022-11-22 01:16:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-22 01:16:36,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:36,230 INFO L195 NwaCegarLoop]: trace histogram [17, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 01:16:36,231 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-22 01:16:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 134025116, now seen corresponding path program 1 times [2022-11-22 01:16:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828079212] [2022-11-22 01:16:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2022-11-22 01:16:36,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:36,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828079212] [2022-11-22 01:16:36,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828079212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:36,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:36,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:16:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156733239] [2022-11-22 01:16:36,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:16:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:16:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:16:36,812 INFO L87 Difference]: Start difference. First operand 38338 states and 54690 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27)