./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:43:06,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:43:06,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:43:06,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:43:06,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:43:06,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:43:06,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:43:06,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:43:06,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:43:06,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:43:06,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:43:06,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:43:06,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:43:06,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:43:06,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:43:06,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:43:06,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:43:06,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:43:06,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:43:06,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:43:06,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:43:06,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:43:06,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:43:06,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:43:06,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:43:06,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:43:06,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:43:06,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:43:06,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:43:06,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:43:06,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:43:06,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:43:06,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:43:06,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:43:06,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:43:06,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:43:06,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:43:06,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:43:06,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:43:06,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:43:06,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:43:06,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:43:06,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:43:06,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:43:06,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:43:06,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:43:06,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:43:06,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:43:06,608 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:43:06,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:43:06,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:43:06,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:43:06,609 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:43:06,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:43:06,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:43:06,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:43:06,610 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:43:06,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:43:06,610 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:43:06,611 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:43:06,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:43:06,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:43:06,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:43:06,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:43:06,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:43:06,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:43:06,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:43:06,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:43:06,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:43:06,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:43:06,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:43:06,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:43:06,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:43:06,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:43:06,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:43:06,615 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:43:06,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:43:06,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:43:06,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:43:06,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:43:06,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb6aba39a63540626ae26255eab93a5f2c0864f87ba11cb320579066e7aefd2 [2021-11-20 23:43:06,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:43:06,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:43:06,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:43:06,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:43:06,874 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:43:06,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-20 23:43:06,966 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/data/81c972dd3/c61ea925f13140edaff5f2d4b3ab1523/FLAG75fbdaa07 [2021-11-20 23:43:07,916 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:43:07,917 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-20 23:43:07,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/data/81c972dd3/c61ea925f13140edaff5f2d4b3ab1523/FLAG75fbdaa07 [2021-11-20 23:43:08,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/data/81c972dd3/c61ea925f13140edaff5f2d4b3ab1523 [2021-11-20 23:43:08,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:43:08,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:43:08,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:43:08,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:43:08,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:43:08,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:08" (1/1) ... [2021-11-20 23:43:08,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c326c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:08, skipping insertion in model container [2021-11-20 23:43:08,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:08" (1/1) ... [2021-11-20 23:43:08,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:43:08,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:43:11,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2021-11-20 23:43:11,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2021-11-20 23:43:11,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2021-11-20 23:43:11,530 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2021-11-20 23:43:11,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:43:11,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:43:11,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305216,305229] [2021-11-20 23:43:11,996 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305385,305398] [2021-11-20 23:43:11,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305552,305565] [2021-11-20 23:43:11,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i[305720,305733] [2021-11-20 23:43:12,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:43:12,224 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:43:12,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12 WrapperNode [2021-11-20 23:43:12,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:43:12,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:43:12,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:43:12,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:43:12,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,551 INFO L137 Inliner]: procedures = 411, calls = 1991, calls flagged for inlining = 210, calls inlined = 187, statements flattened = 4406 [2021-11-20 23:43:12,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:43:12,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:43:12,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:43:12,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:43:12,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:43:12,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:43:12,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:43:12,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:43:12,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (1/1) ... [2021-11-20 23:43:12,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:43:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:43:12,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:43:12,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00fe018d-2375-466d-8722-42c13e36bf54/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:43:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_probe [2021-11-20 23:43:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_probe [2021-11-20 23:43:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:43:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:43:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:43:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:43:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 23:43:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 23:43:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:43:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-20 23:43:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:43:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:43:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-20 23:43:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-20 23:43:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure __dnet_set_hwaddr [2021-11-20 23:43:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __dnet_set_hwaddr [2021-11-20 23:43:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:43:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:43:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 23:43:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 23:43:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:43:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:43:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:43:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:43:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:43:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:43:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:43:12,943 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-20 23:43:12,943 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-20 23:43:12,943 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:43:12,943 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:43:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:43:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-20 23:43:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-20 23:43:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:43:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:43:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:43:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:43:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:43:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:43:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_reset_hw [2021-11-20 23:43:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_reset_hw [2021-11-20 23:43:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:43:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-20 23:43:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:43:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 23:43:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 23:43:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 23:43:12,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 23:43:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-20 23:43:12,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-20 23:43:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:43:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-20 23:43:12,949 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-20 23:43:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:43:12,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:43:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 23:43:12,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 23:43:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:43:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:43:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:43:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:43:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:43:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-20 23:43:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-20 23:43:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:43:12,952 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:43:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:43:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:43:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-20 23:43:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-20 23:43:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-20 23:43:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-20 23:43:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:43:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:43:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:43:12,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:43:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-20 23:43:12,955 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-20 23:43:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_free [2021-11-20 23:43:12,955 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_free [2021-11-20 23:43:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:43:12,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:43:12,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:43:12,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:43:12,957 INFO L130 BoogieDeclarations]: Found specification of procedure mdiobus_unregister [2021-11-20 23:43:12,957 INFO L138 BoogieDeclarations]: Found implementation of procedure mdiobus_unregister [2021-11-20 23:43:12,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:43:12,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-20 23:43:12,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_dnet [2021-11-20 23:43:12,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_dnet [2021-11-20 23:43:12,959 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:43:12,959 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:43:12,959 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_readw_mac [2021-11-20 23:43:12,959 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_readw_mac [2021-11-20 23:43:12,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:43:12,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:43:12,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:43:12,960 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-20 23:43:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-20 23:43:12,961 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:43:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:43:12,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:43:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:43:12,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-20 23:43:12,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-20 23:43:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_close [2021-11-20 23:43:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_close [2021-11-20 23:43:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2021-11-20 23:43:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2021-11-20 23:43:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_handle_link_change [2021-11-20 23:43:12,967 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_handle_link_change [2021-11-20 23:43:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:43:12,967 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:43:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:43:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:43:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_writew_mac [2021-11-20 23:43:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_writew_mac [2021-11-20 23:43:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:43:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:43:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:43:12,976 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:43:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:43:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:43:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:43:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_remove [2021-11-20 23:43:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_remove [2021-11-20 23:43:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:43:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:43:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure dnet_open [2021-11-20 23:43:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure dnet_open [2021-11-20 23:43:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure phy_connect [2021-11-20 23:43:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_connect [2021-11-20 23:43:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:43:12,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:43:12,978 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-20 23:43:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-20 23:43:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:43:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:43:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:43:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-20 23:43:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-20 23:43:13,693 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:43:13,696 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:43:14,684 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:43:20,252 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:43:20,304 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:43:21,174 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:43:21,175 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:43:21,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:21 BoogieIcfgContainer [2021-11-20 23:43:21,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:43:21,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:43:21,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:43:21,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:43:21,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:43:08" (1/3) ... [2021-11-20 23:43:21,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4263d8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:21, skipping insertion in model container [2021-11-20 23:43:21,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:12" (2/3) ... [2021-11-20 23:43:21,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4263d8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:21, skipping insertion in model container [2021-11-20 23:43:21,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:21" (3/3) ... [2021-11-20 23:43:21,191 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dnet.cil.i [2021-11-20 23:43:21,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:43:21,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 23:43:21,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:43:21,274 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:43:21,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:43:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 970 states, 581 states have (on average 1.306368330464716) internal successors, (759), 594 states have internal predecessors, (759), 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) [2021-11-20 23:43:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 23:43:21,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:21,337 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:21,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash 568666750, now seen corresponding path program 1 times [2021-11-20 23:43:21,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:21,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727437288] [2021-11-20 23:43:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:21,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-20 23:43:22,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:22,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727437288] [2021-11-20 23:43:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727437288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:22,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:22,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:22,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053318372] [2021-11-20 23:43:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:22,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:22,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:22,077 INFO L87 Difference]: Start difference. First operand has 970 states, 581 states have (on average 1.306368330464716) internal successors, (759), 594 states have internal predecessors, (759), 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) [2021-11-20 23:43:24,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:26,750 INFO L93 Difference]: Finished difference Result 2749 states and 4003 transitions. [2021-11-20 23:43:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:26,755 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 [2021-11-20 23:43:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:26,790 INFO L225 Difference]: With dead ends: 2749 [2021-11-20 23:43:26,791 INFO L226 Difference]: Without dead ends: 1788 [2021-11-20 23:43:26,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:26,805 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 1223 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:26,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 2517 Invalid, 514 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 23:43:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-11-20 23:43:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1784. [2021-11-20 23:43:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1088 states have (on average 1.3060661764705883) internal successors, (1421), 1112 states have internal predecessors, (1421), 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) [2021-11-20 23:43:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2562 transitions. [2021-11-20 23:43:27,031 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2562 transitions. Word has length 117 [2021-11-20 23:43:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:27,032 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2562 transitions. [2021-11-20 23:43:27,033 INFO L471 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) [2021-11-20 23:43:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2562 transitions. [2021-11-20 23:43:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 23:43:27,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:27,038 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:27,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:43:27,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:27,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1222086011, now seen corresponding path program 1 times [2021-11-20 23:43:27,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:27,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227829213] [2021-11-20 23:43:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:27,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-20 23:43:27,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:27,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227829213] [2021-11-20 23:43:27,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227829213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:27,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:27,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:27,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757088643] [2021-11-20 23:43:27,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:27,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:27,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:27,254 INFO L87 Difference]: Start difference. First operand 1784 states and 2562 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) [2021-11-20 23:43:29,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:31,844 INFO L93 Difference]: Finished difference Result 5114 states and 7427 transitions. [2021-11-20 23:43:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:31,845 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 [2021-11-20 23:43:31,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:31,946 INFO L225 Difference]: With dead ends: 5114 [2021-11-20 23:43:31,953 INFO L226 Difference]: Without dead ends: 3351 [2021-11-20 23:43:31,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:31,966 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1178 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:31,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 2616 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 531 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 23:43:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-20 23:43:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3322. [2021-11-20 23:43:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2047 states have (on average 1.3141182217879823) internal successors, (2690), 2097 states have internal predecessors, (2690), 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) [2021-11-20 23:43:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4853 transitions. [2021-11-20 23:43:32,263 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4853 transitions. Word has length 119 [2021-11-20 23:43:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:32,264 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 4853 transitions. [2021-11-20 23:43:32,264 INFO L471 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) [2021-11-20 23:43:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4853 transitions. [2021-11-20 23:43:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 23:43:32,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:32,274 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:32,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:43:32,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2114285433, now seen corresponding path program 1 times [2021-11-20 23:43:32,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6807018] [2021-11-20 23:43:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:32,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-20 23:43:32,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6807018] [2021-11-20 23:43:32,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6807018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:32,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:32,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:32,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936307678] [2021-11-20 23:43:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:32,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:32,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:32,595 INFO L87 Difference]: Start difference. First operand 3322 states and 4853 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) [2021-11-20 23:43:35,254 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:37,591 INFO L93 Difference]: Finished difference Result 9306 states and 13482 transitions. [2021-11-20 23:43:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:37,592 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 [2021-11-20 23:43:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:37,647 INFO L225 Difference]: With dead ends: 9306 [2021-11-20 23:43:37,648 INFO L226 Difference]: Without dead ends: 6005 [2021-11-20 23:43:37,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:37,668 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1010 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:37,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 2553 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 23:43:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-11-20 23:43:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5972. [2021-11-20 23:43:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 3641 states have (on average 1.284811864872288) internal successors, (4678), 3747 states have internal predecessors, (4678), 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) [2021-11-20 23:43:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8507 transitions. [2021-11-20 23:43:38,030 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8507 transitions. Word has length 127 [2021-11-20 23:43:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:38,031 INFO L470 AbstractCegarLoop]: Abstraction has 5972 states and 8507 transitions. [2021-11-20 23:43:38,031 INFO L471 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) [2021-11-20 23:43:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8507 transitions. [2021-11-20 23:43:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 23:43:38,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:38,035 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:43:38,036 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash 744030197, now seen corresponding path program 1 times [2021-11-20 23:43:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398512634] [2021-11-20 23:43:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:38,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-20 23:43:38,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:38,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398512634] [2021-11-20 23:43:38,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398512634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:38,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:38,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:38,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726671661] [2021-11-20 23:43:38,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:38,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:38,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:38,225 INFO L87 Difference]: Start difference. First operand 5972 states and 8507 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) [2021-11-20 23:43:41,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:42,864 INFO L93 Difference]: Finished difference Result 16694 states and 23960 transitions. [2021-11-20 23:43:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:42,865 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 [2021-11-20 23:43:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:42,965 INFO L225 Difference]: With dead ends: 16694 [2021-11-20 23:43:42,965 INFO L226 Difference]: Without dead ends: 10743 [2021-11-20 23:43:42,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:42,996 INFO L933 BasicCegarLoop]: 1386 mSDtfsCounter, 1091 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1091 Valid, 2489 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 532 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 23:43:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2021-11-20 23:43:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 10702. [2021-11-20 23:43:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10702 states, 6517 states have (on average 1.2696025778732545) internal successors, (8274), 6719 states have internal predecessors, (8274), 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) [2021-11-20 23:43:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 15395 transitions. [2021-11-20 23:43:43,764 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 15395 transitions. Word has length 135 [2021-11-20 23:43:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 10702 states and 15395 transitions. [2021-11-20 23:43:43,767 INFO L471 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) [2021-11-20 23:43:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 15395 transitions. [2021-11-20 23:43:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:43:43,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:43,771 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:43,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:43:43,772 INFO L402 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)] === [2021-11-20 23:43:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1624052245, now seen corresponding path program 1 times [2021-11-20 23:43:43,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:43,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808554660] [2021-11-20 23:43:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:43,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-20 23:43:43,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808554660] [2021-11-20 23:43:43,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808554660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:43,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:43,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929178969] [2021-11-20 23:43:43,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:43,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:43,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:43,978 INFO L87 Difference]: Start difference. First operand 10702 states and 15395 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) [2021-11-20 23:43:47,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:48,433 INFO L93 Difference]: Finished difference Result 20180 states and 29062 transitions. [2021-11-20 23:43:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:48,434 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 [2021-11-20 23:43:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:48,515 INFO L225 Difference]: With dead ends: 20180 [2021-11-20 23:43:48,516 INFO L226 Difference]: Without dead ends: 9499 [2021-11-20 23:43:48,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:48,570 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 1177 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:48,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 2924 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 689 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 23:43:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9499 states. [2021-11-20 23:43:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9499 to 9467. [2021-11-20 23:43:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9467 states, 5871 states have (on average 1.2679270993016523) internal successors, (7444), 6060 states have internal predecessors, (7444), 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) [2021-11-20 23:43:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9467 states to 9467 states and 13559 transitions. [2021-11-20 23:43:49,138 INFO L78 Accepts]: Start accepts. Automaton has 9467 states and 13559 transitions. Word has length 146 [2021-11-20 23:43:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:49,139 INFO L470 AbstractCegarLoop]: Abstraction has 9467 states and 13559 transitions. [2021-11-20 23:43:49,139 INFO L471 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) [2021-11-20 23:43:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 9467 states and 13559 transitions. [2021-11-20 23:43:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 23:43:49,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:49,143 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:49,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:43:49,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 549316243, now seen corresponding path program 1 times [2021-11-20 23:43:49,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:49,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243965780] [2021-11-20 23:43:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:49,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-20 23:43:49,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243965780] [2021-11-20 23:43:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243965780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:49,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:49,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:43:49,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817403571] [2021-11-20 23:43:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:49,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:43:49,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:43:49,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:43:49,425 INFO L87 Difference]: Start difference. First operand 9467 states and 13559 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) [2021-11-20 23:43:52,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:55,457 INFO L93 Difference]: Finished difference Result 18804 states and 26945 transitions. [2021-11-20 23:43:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:43:55,461 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 [2021-11-20 23:43:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:55,554 INFO L225 Difference]: With dead ends: 18804 [2021-11-20 23:43:55,554 INFO L226 Difference]: Without dead ends: 18802 [2021-11-20 23:43:55,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:43:55,566 INFO L933 BasicCegarLoop]: 1393 mSDtfsCounter, 1246 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 5256 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:55,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 5256 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 23:43:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18802 states. [2021-11-20 23:43:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18802 to 18796. [2021-11-20 23:43:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18796 states, 11644 states have (on average 1.269838543455857) internal successors, (14786), 12020 states have internal predecessors, (14786), 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) [2021-11-20 23:43:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18796 states to 18796 states and 26940 transitions. [2021-11-20 23:43:56,642 INFO L78 Accepts]: Start accepts. Automaton has 18796 states and 26940 transitions. Word has length 155 [2021-11-20 23:43:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:56,643 INFO L470 AbstractCegarLoop]: Abstraction has 18796 states and 26940 transitions. [2021-11-20 23:43:56,643 INFO L471 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) [2021-11-20 23:43:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18796 states and 26940 transitions. [2021-11-20 23:43:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 23:43:56,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:56,646 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:43:56,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:43:56,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:43:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -905786563, now seen corresponding path program 1 times [2021-11-20 23:43:56,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:56,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311187897] [2021-11-20 23:43:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:56,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-20 23:43:56,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:56,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311187897] [2021-11-20 23:43:56,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311187897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:56,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:56,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:43:56,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747191815] [2021-11-20 23:43:56,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:56,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:43:56,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:56,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:43:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:43:56,882 INFO L87 Difference]: Start difference. First operand 18796 states and 26940 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) [2021-11-20 23:43:59,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:03,036 INFO L93 Difference]: Finished difference Result 18808 states and 26948 transitions. [2021-11-20 23:44:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:03,039 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 [2021-11-20 23:44:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:03,135 INFO L225 Difference]: With dead ends: 18808 [2021-11-20 23:44:03,135 INFO L226 Difference]: Without dead ends: 18806 [2021-11-20 23:44:03,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:03,147 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:03,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:44:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18806 states. [2021-11-20 23:44:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18806 to 18800. [2021-11-20 23:44:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 11647 states have (on average 1.269769039237572) internal successors, (14789), 12023 states have internal predecessors, (14789), 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) [2021-11-20 23:44:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 26943 transitions. [2021-11-20 23:44:04,104 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 26943 transitions. Word has length 160 [2021-11-20 23:44:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:04,105 INFO L470 AbstractCegarLoop]: Abstraction has 18800 states and 26943 transitions. [2021-11-20 23:44:04,105 INFO L471 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) [2021-11-20 23:44:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 26943 transitions. [2021-11-20 23:44:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 23:44:04,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:04,108 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:04,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:44:04,109 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:04,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2120308883, now seen corresponding path program 1 times [2021-11-20 23:44:04,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:04,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634836366] [2021-11-20 23:44:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:04,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2021-11-20 23:44:04,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634836366] [2021-11-20 23:44:04,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634836366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:04,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:04,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:04,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936504175] [2021-11-20 23:44:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:04,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:04,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:04,288 INFO L87 Difference]: Start difference. First operand 18800 states and 26943 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) [2021-11-20 23:44:07,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:10,018 INFO L93 Difference]: Finished difference Result 18812 states and 26951 transitions. [2021-11-20 23:44:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:10,022 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 [2021-11-20 23:44:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:10,121 INFO L225 Difference]: With dead ends: 18812 [2021-11-20 23:44:10,121 INFO L226 Difference]: Without dead ends: 18810 [2021-11-20 23:44:10,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:10,135 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:10,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 23:44:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18810 states. [2021-11-20 23:44:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18810 to 18804. [2021-11-20 23:44:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 11650 states have (on average 1.2696995708154506) internal successors, (14792), 12026 states have internal predecessors, (14792), 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) [2021-11-20 23:44:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 26946 transitions. [2021-11-20 23:44:11,191 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 26946 transitions. Word has length 165 [2021-11-20 23:44:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:11,192 INFO L470 AbstractCegarLoop]: Abstraction has 18804 states and 26946 transitions. [2021-11-20 23:44:11,192 INFO L471 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) [2021-11-20 23:44:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 26946 transitions. [2021-11-20 23:44:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 23:44:11,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:11,196 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:11,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:44:11,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1610420715, now seen corresponding path program 1 times [2021-11-20 23:44:11,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:11,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476910475] [2021-11-20 23:44:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:11,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-20 23:44:11,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476910475] [2021-11-20 23:44:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476910475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:11,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:11,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:11,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454790287] [2021-11-20 23:44:11,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:11,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:11,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:11,433 INFO L87 Difference]: Start difference. First operand 18804 states and 26946 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) [2021-11-20 23:44:14,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:16,899 INFO L93 Difference]: Finished difference Result 18816 states and 26954 transitions. [2021-11-20 23:44:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:16,903 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 [2021-11-20 23:44:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:16,988 INFO L225 Difference]: With dead ends: 18816 [2021-11-20 23:44:16,988 INFO L226 Difference]: Without dead ends: 18814 [2021-11-20 23:44:16,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:17,001 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:17,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 23:44:17,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18814 states. [2021-11-20 23:44:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18814 to 18808. [2021-11-20 23:44:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18808 states, 11653 states have (on average 1.2696301381618467) internal successors, (14795), 12029 states have internal predecessors, (14795), 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) [2021-11-20 23:44:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18808 states to 18808 states and 26949 transitions. [2021-11-20 23:44:18,388 INFO L78 Accepts]: Start accepts. Automaton has 18808 states and 26949 transitions. Word has length 179 [2021-11-20 23:44:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:18,389 INFO L470 AbstractCegarLoop]: Abstraction has 18808 states and 26949 transitions. [2021-11-20 23:44:18,389 INFO L471 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) [2021-11-20 23:44:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18808 states and 26949 transitions. [2021-11-20 23:44:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 23:44:18,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:18,408 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 5, 4, 4, 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] [2021-11-20 23:44:18,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:44:18,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1716517523, now seen corresponding path program 1 times [2021-11-20 23:44:18,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238051987] [2021-11-20 23:44:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:18,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-20 23:44:18,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:18,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238051987] [2021-11-20 23:44:18,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238051987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:18,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:18,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:18,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346489499] [2021-11-20 23:44:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:18,619 INFO L87 Difference]: Start difference. First operand 18808 states and 26949 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, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:44:21,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:24,418 INFO L93 Difference]: Finished difference Result 18820 states and 26957 transitions. [2021-11-20 23:44:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:24,423 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, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 175 [2021-11-20 23:44:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:24,521 INFO L225 Difference]: With dead ends: 18820 [2021-11-20 23:44:24,522 INFO L226 Difference]: Without dead ends: 18818 [2021-11-20 23:44:24,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:24,536 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:24,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 23:44:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2021-11-20 23:44:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18812. [2021-11-20 23:44:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18812 states, 11656 states have (on average 1.269560741249142) internal successors, (14798), 12032 states have internal predecessors, (14798), 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) [2021-11-20 23:44:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18812 states to 18812 states and 26952 transitions. [2021-11-20 23:44:25,388 INFO L78 Accepts]: Start accepts. Automaton has 18812 states and 26952 transitions. Word has length 175 [2021-11-20 23:44:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:25,388 INFO L470 AbstractCegarLoop]: Abstraction has 18812 states and 26952 transitions. [2021-11-20 23:44:25,389 INFO L471 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, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:44:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18812 states and 26952 transitions. [2021-11-20 23:44:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 23:44:25,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:25,393 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 10, 10, 10, 10, 10, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:44:25,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:44:25,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1360107069, now seen corresponding path program 1 times [2021-11-20 23:44:25,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:25,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311325120] [2021-11-20 23:44:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:25,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-20 23:44:25,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311325120] [2021-11-20 23:44:25,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311325120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:25,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:25,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:25,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541038238] [2021-11-20 23:44:25,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:25,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:25,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:25,580 INFO L87 Difference]: Start difference. First operand 18812 states and 26952 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, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:44:28,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:31,347 INFO L93 Difference]: Finished difference Result 18824 states and 26960 transitions. [2021-11-20 23:44:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:31,351 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, (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 180 [2021-11-20 23:44:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:31,435 INFO L225 Difference]: With dead ends: 18824 [2021-11-20 23:44:31,435 INFO L226 Difference]: Without dead ends: 18822 [2021-11-20 23:44:31,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:31,447 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:31,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1247 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 23:44:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18822 states. [2021-11-20 23:44:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18822 to 18816. [2021-11-20 23:44:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18816 states, 11659 states have (on average 1.269491380049747) internal successors, (14801), 12035 states have internal predecessors, (14801), 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) [2021-11-20 23:44:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18816 states to 18816 states and 26955 transitions. [2021-11-20 23:44:32,586 INFO L78 Accepts]: Start accepts. Automaton has 18816 states and 26955 transitions. Word has length 180 [2021-11-20 23:44:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 18816 states and 26955 transitions. [2021-11-20 23:44:32,587 INFO L471 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, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 23:44:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 18816 states and 26955 transitions. [2021-11-20 23:44:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 23:44:32,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:32,591 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:32,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:44:32,592 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1739731821, now seen corresponding path program 1 times [2021-11-20 23:44:32,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:32,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019075215] [2021-11-20 23:44:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:32,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-20 23:44:32,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019075215] [2021-11-20 23:44:32,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019075215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:32,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:32,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:32,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929995772] [2021-11-20 23:44:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:32,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:32,772 INFO L87 Difference]: Start difference. First operand 18816 states and 26955 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) [2021-11-20 23:44:35,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:38,258 INFO L93 Difference]: Finished difference Result 27365 states and 39040 transitions. [2021-11-20 23:44:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:38,262 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 [2021-11-20 23:44:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:38,349 INFO L225 Difference]: With dead ends: 27365 [2021-11-20 23:44:38,349 INFO L226 Difference]: Without dead ends: 27363 [2021-11-20 23:44:38,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:38,362 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 1068 mSDsluCounter, 4539 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 5146 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:38,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 5146 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1030 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 23:44:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27363 states. [2021-11-20 23:44:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27363 to 27345. [2021-11-20 23:44:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27345 states, 16923 states have (on average 1.2680966731666963) internal successors, (21460), 17506 states have internal predecessors, (21460), 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) [2021-11-20 23:44:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27345 states to 27345 states and 39021 transitions. [2021-11-20 23:44:39,665 INFO L78 Accepts]: Start accepts. Automaton has 27345 states and 39021 transitions. Word has length 185 [2021-11-20 23:44:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:39,665 INFO L470 AbstractCegarLoop]: Abstraction has 27345 states and 39021 transitions. [2021-11-20 23:44:39,666 INFO L471 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) [2021-11-20 23:44:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27345 states and 39021 transitions. [2021-11-20 23:44:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-20 23:44:39,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:39,669 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:39,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:44:39,670 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:39,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1873484267, now seen corresponding path program 1 times [2021-11-20 23:44:39,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:39,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505752345] [2021-11-20 23:44:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-11-20 23:44:39,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:39,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505752345] [2021-11-20 23:44:39,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505752345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:39,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:39,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:39,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628667779] [2021-11-20 23:44:39,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:39,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:39,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:39,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:39,854 INFO L87 Difference]: Start difference. First operand 27345 states and 39021 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) [2021-11-20 23:44:42,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:45,721 INFO L93 Difference]: Finished difference Result 27357 states and 39029 transitions. [2021-11-20 23:44:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:44:45,724 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 [2021-11-20 23:44:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:45,803 INFO L225 Difference]: With dead ends: 27357 [2021-11-20 23:44:45,804 INFO L226 Difference]: Without dead ends: 27355 [2021-11-20 23:44:45,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:44:45,815 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:45,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 23:44:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-11-20 23:44:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 27349. [2021-11-20 23:44:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27349 states, 16926 states have (on average 1.2680491551459294) internal successors, (21463), 17509 states have internal predecessors, (21463), 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) [2021-11-20 23:44:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27349 states to 27349 states and 39024 transitions. [2021-11-20 23:44:47,047 INFO L78 Accepts]: Start accepts. Automaton has 27349 states and 39024 transitions. Word has length 199 [2021-11-20 23:44:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:47,048 INFO L470 AbstractCegarLoop]: Abstraction has 27349 states and 39024 transitions. [2021-11-20 23:44:47,048 INFO L471 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) [2021-11-20 23:44:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27349 states and 39024 transitions. [2021-11-20 23:44:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 23:44:47,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:47,051 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:47,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:44:47,051 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash -290612860, now seen corresponding path program 1 times [2021-11-20 23:44:47,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:47,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598276959] [2021-11-20 23:44:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:47,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-11-20 23:44:47,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598276959] [2021-11-20 23:44:47,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598276959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:47,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:47,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:44:47,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036011774] [2021-11-20 23:44:47,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:47,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:44:47,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:44:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:44:47,184 INFO L87 Difference]: Start difference. First operand 27349 states and 39024 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) [2021-11-20 23:44:50,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:52,518 INFO L93 Difference]: Finished difference Result 65851 states and 94246 transitions. [2021-11-20 23:44:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:44:52,519 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 [2021-11-20 23:44:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:52,659 INFO L225 Difference]: With dead ends: 65851 [2021-11-20 23:44:52,660 INFO L226 Difference]: Without dead ends: 38584 [2021-11-20 23:44:52,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:44:52,737 INFO L933 BasicCegarLoop]: 2055 mSDtfsCounter, 1174 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:52,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 3146 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 740 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 23:44:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38584 states. [2021-11-20 23:44:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38584 to 38464. [2021-11-20 23:44:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38464 states, 23980 states have (on average 1.269724770642202) internal successors, (30448), 24806 states have internal predecessors, (30448), 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) [2021-11-20 23:44:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38464 states to 38464 states and 54914 transitions. [2021-11-20 23:44:54,595 INFO L78 Accepts]: Start accepts. Automaton has 38464 states and 54914 transitions. Word has length 189 [2021-11-20 23:44:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:54,596 INFO L470 AbstractCegarLoop]: Abstraction has 38464 states and 54914 transitions. [2021-11-20 23:44:54,596 INFO L471 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) [2021-11-20 23:44:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38464 states and 54914 transitions. [2021-11-20 23:44:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 23:44:54,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:54,599 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:44:54,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:44:54,599 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:44:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1699976485, now seen corresponding path program 1 times [2021-11-20 23:44:54,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853395645] [2021-11-20 23:44:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:54,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-11-20 23:44:54,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:54,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853395645] [2021-11-20 23:44:54,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853395645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:54,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:54,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:54,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870328934] [2021-11-20 23:44:54,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:54,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:54,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:54,822 INFO L87 Difference]: Start difference. First operand 38464 states and 54914 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) [2021-11-20 23:44:58,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:01,265 INFO L93 Difference]: Finished difference Result 38476 states and 54922 transitions. [2021-11-20 23:45:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:45:01,269 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 [2021-11-20 23:45:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:01,418 INFO L225 Difference]: With dead ends: 38476 [2021-11-20 23:45:01,418 INFO L226 Difference]: Without dead ends: 38474 [2021-11-20 23:45:01,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:45:01,439 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:01,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-20 23:45:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38474 states. [2021-11-20 23:45:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38474 to 38468. [2021-11-20 23:45:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38468 states, 23983 states have (on average 1.2696910311470626) internal successors, (30451), 24809 states have internal predecessors, (30451), 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) [2021-11-20 23:45:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38468 states to 38468 states and 54917 transitions. [2021-11-20 23:45:03,331 INFO L78 Accepts]: Start accepts. Automaton has 38468 states and 54917 transitions. Word has length 204 [2021-11-20 23:45:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 38468 states and 54917 transitions. [2021-11-20 23:45:03,332 INFO L471 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) [2021-11-20 23:45:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 38468 states and 54917 transitions. [2021-11-20 23:45:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 23:45:03,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:03,335 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:45:03,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:45:03,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:45:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -589586115, now seen corresponding path program 1 times [2021-11-20 23:45:03,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:03,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380998563] [2021-11-20 23:45:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:03,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2021-11-20 23:45:03,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380998563] [2021-11-20 23:45:03,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380998563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:03,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:03,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:45:03,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616856890] [2021-11-20 23:45:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:03,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:45:03,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:45:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:03,520 INFO L87 Difference]: Start difference. First operand 38468 states and 54917 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) [2021-11-20 23:45:06,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:10,332 INFO L93 Difference]: Finished difference Result 38480 states and 54925 transitions. [2021-11-20 23:45:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:45:10,336 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 [2021-11-20 23:45:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:10,494 INFO L225 Difference]: With dead ends: 38480 [2021-11-20 23:45:10,494 INFO L226 Difference]: Without dead ends: 38478 [2021-11-20 23:45:10,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:45:10,516 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:10,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-20 23:45:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38478 states. [2021-11-20 23:45:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38478 to 38472. [2021-11-20 23:45:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38472 states, 23986 states have (on average 1.2696573000917202) internal successors, (30454), 24812 states have internal predecessors, (30454), 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) [2021-11-20 23:45:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38472 states to 38472 states and 54920 transitions. [2021-11-20 23:45:12,308 INFO L78 Accepts]: Start accepts. Automaton has 38472 states and 54920 transitions. Word has length 200 [2021-11-20 23:45:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:12,308 INFO L470 AbstractCegarLoop]: Abstraction has 38472 states and 54920 transitions. [2021-11-20 23:45:12,309 INFO L471 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) [2021-11-20 23:45:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38472 states and 54920 transitions. [2021-11-20 23:45:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 23:45:12,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:12,311 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 10, 10, 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] [2021-11-20 23:45:12,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:45:12,311 INFO L402 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)] === [2021-11-20 23:45:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1601765229, now seen corresponding path program 1 times [2021-11-20 23:45:12,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713898972] [2021-11-20 23:45:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:12,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-20 23:45:12,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713898972] [2021-11-20 23:45:12,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713898972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:12,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:12,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:45:12,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315074376] [2021-11-20 23:45:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:12,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:45:12,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:45:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:12,481 INFO L87 Difference]: Start difference. First operand 38472 states and 54920 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 23:45:15,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:19,282 INFO L93 Difference]: Finished difference Result 38484 states and 54928 transitions. [2021-11-20 23:45:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:45:19,286 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, (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 205 [2021-11-20 23:45:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:19,450 INFO L225 Difference]: With dead ends: 38484 [2021-11-20 23:45:19,451 INFO L226 Difference]: Without dead ends: 38480 [2021-11-20 23:45:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:45:19,471 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1241 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:19,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 5259 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1026 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-20 23:45:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38480 states. [2021-11-20 23:45:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38480 to 38474. [2021-11-20 23:45:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38474 states, 23988 states have (on average 1.2695931298982825) internal successors, (30455), 24813 states have internal predecessors, (30455), 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) [2021-11-20 23:45:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38474 states to 38474 states and 54921 transitions. [2021-11-20 23:45:21,068 INFO L78 Accepts]: Start accepts. Automaton has 38474 states and 54921 transitions. Word has length 205 [2021-11-20 23:45:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:21,069 INFO L470 AbstractCegarLoop]: Abstraction has 38474 states and 54921 transitions. [2021-11-20 23:45:21,069 INFO L471 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-20 23:45:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38474 states and 54921 transitions. [2021-11-20 23:45:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 23:45:21,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:21,072 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:45:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:45:21,073 INFO L402 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)] === [2021-11-20 23:45:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 519888573, now seen corresponding path program 1 times [2021-11-20 23:45:21,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:21,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044950071] [2021-11-20 23:45:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:21,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-11-20 23:45:21,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044950071] [2021-11-20 23:45:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044950071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:21,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:21,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:45:21,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53898625] [2021-11-20 23:45:21,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:21,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:45:21,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:45:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:21,243 INFO L87 Difference]: Start difference. First operand 38474 states and 54921 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) [2021-11-20 23:45:24,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:28,373 INFO L93 Difference]: Finished difference Result 38480 states and 54924 transitions. [2021-11-20 23:45:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:45:28,376 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 [2021-11-20 23:45:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:28,538 INFO L225 Difference]: With dead ends: 38480 [2021-11-20 23:45:28,538 INFO L226 Difference]: Without dead ends: 38294 [2021-11-20 23:45:28,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:45:28,558 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 1237 mSDsluCounter, 4619 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 5261 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:28,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 5261 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:45:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38294 states. [2021-11-20 23:45:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38294 to 38290. [2021-11-20 23:45:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38290 states, 23926 states have (on average 1.2682855471035694) internal successors, (30345), 24704 states have internal predecessors, (30345), 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) [2021-11-20 23:45:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38290 states to 38290 states and 54594 transitions. [2021-11-20 23:45:30,306 INFO L78 Accepts]: Start accepts. Automaton has 38290 states and 54594 transitions. Word has length 210 [2021-11-20 23:45:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:30,307 INFO L470 AbstractCegarLoop]: Abstraction has 38290 states and 54594 transitions. [2021-11-20 23:45:30,307 INFO L471 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) [2021-11-20 23:45:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38290 states and 54594 transitions. [2021-11-20 23:45:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-20 23:45:30,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:30,312 INFO L514 BasicCegarLoop]: 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] [2021-11-20 23:45:30,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:45:30,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:45:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -24560604, now seen corresponding path program 1 times [2021-11-20 23:45:30,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:30,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739782825] [2021-11-20 23:45:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:30,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-11-20 23:45:30,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739782825] [2021-11-20 23:45:30,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739782825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:30,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:30,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:45:30,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959141351] [2021-11-20 23:45:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:30,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:45:30,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:45:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:30,495 INFO L87 Difference]: Start difference. First operand 38290 states and 54594 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) [2021-11-20 23:45:33,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:36,576 INFO L93 Difference]: Finished difference Result 88037 states and 124712 transitions. [2021-11-20 23:45:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:45:36,577 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 230 [2021-11-20 23:45:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:36,796 INFO L225 Difference]: With dead ends: 88037 [2021-11-20 23:45:36,797 INFO L226 Difference]: Without dead ends: 49829 [2021-11-20 23:45:37,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:37,079 INFO L933 BasicCegarLoop]: 1461 mSDtfsCounter, 1239 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:37,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 2353 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 509 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 23:45:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49829 states. [2021-11-20 23:45:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49829 to 49757. [2021-11-20 23:45:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49757 states, 30857 states have (on average 1.2651586349936805) internal successors, (39039), 31928 states have internal predecessors, (39039), 14421 states have call successors, (14421), 4604 states have call predecessors, (14421), 4476 states have return successors, (16629), 13678 states have call predecessors, (16629), 14415 states have call successors, (16629) [2021-11-20 23:45:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49757 states to 49757 states and 70089 transitions. [2021-11-20 23:45:39,402 INFO L78 Accepts]: Start accepts. Automaton has 49757 states and 70089 transitions. Word has length 230 [2021-11-20 23:45:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:39,403 INFO L470 AbstractCegarLoop]: Abstraction has 49757 states and 70089 transitions. [2021-11-20 23:45:39,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-20 23:45:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 49757 states and 70089 transitions. [2021-11-20 23:45:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 23:45:39,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:39,410 INFO L514 BasicCegarLoop]: trace histogram [18, 10, 10, 10, 10, 10, 10, 7, 7, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:39,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:45:39,410 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-20 23:45:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash -55106340, now seen corresponding path program 1 times [2021-11-20 23:45:39,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:39,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142350270] [2021-11-20 23:45:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:39,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-20 23:45:39,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142350270] [2021-11-20 23:45:39,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142350270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:39,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:39,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:45:39,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128225989] [2021-11-20 23:45:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:39,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:45:39,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:45:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:39,567 INFO L87 Difference]: Start difference. First operand 49757 states and 70089 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:45:43,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:46,530 INFO L93 Difference]: Finished difference Result 112068 states and 157768 transitions. [2021-11-20 23:45:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:45:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 246 [2021-11-20 23:45:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:46,990 INFO L225 Difference]: With dead ends: 112068 [2021-11-20 23:45:46,990 INFO L226 Difference]: Without dead ends: 62393 [2021-11-20 23:45:47,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:47,104 INFO L933 BasicCegarLoop]: 1947 mSDtfsCounter, 1021 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:47,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 3008 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 751 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 23:45:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62393 states.