./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-packetengines-hamachi.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI --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 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:00:14,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:00:14,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:00:14,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:00:14,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:00:14,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:00:14,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:00:14,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:00:14,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:00:14,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:00:14,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:00:14,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:00:14,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:00:14,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:00:14,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:00:14,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:00:14,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:00:14,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:00:14,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:00:14,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:00:14,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:00:14,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:00:14,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:00:14,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:00:14,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:00:14,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:00:14,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:00:14,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:00:14,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:00:14,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:00:14,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:00:14,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:00:14,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:00:14,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:00:14,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:00:14,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:00:14,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:00:14,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:00:14,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:00:14,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:00:14,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:00:14,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:00:14,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:00:14,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:00:14,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:00:14,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:00:14,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:00:14,630 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:00:14,631 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:00:14,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:00:14,631 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:00:14,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:00:14,633 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:00:14,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:00:14,634 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:00:14,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:00:14,634 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:00:14,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:00:14,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:00:14,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:00:14,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:00:14,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:00:14,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:00:14,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:00:14,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:00:14,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:00:14,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:00:14,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:00:14,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:00:14,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:00:14,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:00:14,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:00:14,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:00:14,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:00:14,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:00:14,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:00:14,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:00:14,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:00:14,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:00:14,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:00:14,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e [2022-11-03 04:00:14,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:00:14,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:00:14,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:00:14,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:00:15,000 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:00:15,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2022-11-03 04:00:15,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/data/5def82786/deb004e6001a4f888a8609c5e2640a7d/FLAG5101051ec [2022-11-03 04:00:16,114 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:00:16,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2022-11-03 04:00:16,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/data/5def82786/deb004e6001a4f888a8609c5e2640a7d/FLAG5101051ec [2022-11-03 04:00:16,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/data/5def82786/deb004e6001a4f888a8609c5e2640a7d [2022-11-03 04:00:16,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:00:16,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:00:16,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:00:16,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:00:16,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:00:16,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:00:16" (1/1) ... [2022-11-03 04:00:16,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de5542b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:16, skipping insertion in model container [2022-11-03 04:00:16,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:00:16" (1/1) ... [2022-11-03 04:00:16,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:00:16,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:00:19,789 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2022-11-03 04:00:19,793 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2022-11-03 04:00:19,793 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2022-11-03 04:00:19,794 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2022-11-03 04:00:19,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:00:19,891 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:00:20,320 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2022-11-03 04:00:20,321 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2022-11-03 04:00:20,321 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2022-11-03 04:00:20,322 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_f4973280-23e5-4273-9787-b84e76410a10/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2022-11-03 04:00:20,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:00:20,638 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:00:20,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20 WrapperNode [2022-11-03 04:00:20,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:00:20,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:00:20,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:00:20,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:00:20,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:20,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,005 INFO L138 Inliner]: procedures = 412, calls = 1826, calls flagged for inlining = 207, calls inlined = 191, statements flattened = 4587 [2022-11-03 04:00:21,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:00:21,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:00:21,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:00:21,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:00:21,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:00:21,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:00:21,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:00:21,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:00:21,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (1/1) ... [2022-11-03 04:00:21,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:00:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:21,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:00:21,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:00:21,377 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2022-11-03 04:00:21,378 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2022-11-03 04:00:21,378 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-03 04:00:21,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-03 04:00:21,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 04:00:21,379 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 04:00:21,379 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-03 04:00:21,379 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-03 04:00:21,379 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 04:00:21,379 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 04:00:21,380 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_close [2022-11-03 04:00:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_close [2022-11-03 04:00:21,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 04:00:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 04:00:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2022-11-03 04:00:21,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2022-11-03 04:00:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 04:00:21,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 04:00:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-03 04:00:21,382 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-03 04:00:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_hamachi_private [2022-11-03 04:00:21,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_hamachi_private [2022-11-03 04:00:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 04:00:21,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-03 04:00:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-03 04:00:21,384 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-03 04:00:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 04:00:21,384 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 04:00:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 04:00:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 04:00:21,385 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-03 04:00:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-03 04:00:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:00:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-03 04:00:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-03 04:00:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 04:00:21,387 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 04:00:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 04:00:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-03 04:00:21,388 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-03 04:00:21,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 04:00:21,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-03 04:00:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-03 04:00:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:00:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-03 04:00:21,391 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-03 04:00:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-03 04:00:21,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-03 04:00:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-03 04:00:21,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-03 04:00:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-03 04:00:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-03 04:00:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-03 04:00:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-03 04:00:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2022-11-03 04:00:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2022-11-03 04:00:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-03 04:00:21,395 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-03 04:00:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 04:00:21,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 04:00:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:00:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-03 04:00:21,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-03 04:00:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-03 04:00:21,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-03 04:00:21,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-03 04:00:21,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-03 04:00:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:00:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 04:00:21,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 04:00:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 04:00:21,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 04:00:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:00:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 04:00:21,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 04:00:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 04:00:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 04:00:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_hamachi_private [2022-11-03 04:00:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_hamachi_private [2022-11-03 04:00:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-03 04:00:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-03 04:00:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 04:00:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 04:00:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-03 04:00:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-03 04:00:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-03 04:00:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-03 04:00:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-03 04:00:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-03 04:00:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2022-11-03 04:00:21,406 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2022-11-03 04:00:21,406 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2022-11-03 04:00:21,406 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2022-11-03 04:00:21,407 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_nway_reset [2022-11-03 04:00:21,407 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_nway_reset [2022-11-03 04:00:21,407 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-03 04:00:21,407 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-03 04:00:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:00:21,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:00:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 04:00:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 04:00:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 04:00:21,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 04:00:21,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 04:00:21,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 04:00:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2022-11-03 04:00:21,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2022-11-03 04:00:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-03 04:00:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-03 04:00:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-03 04:00:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-03 04:00:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_open [2022-11-03 04:00:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_open [2022-11-03 04:00:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 04:00:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 04:00:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-03 04:00:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-03 04:00:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-03 04:00:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-03 04:00:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:00:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 04:00:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 04:00:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:00:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-03 04:00:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-03 04:00:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 04:00:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-03 04:00:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-03 04:00:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-03 04:00:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-03 04:00:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 04:00:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 04:00:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_68 [2022-11-03 04:00:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_68 [2022-11-03 04:00:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-03 04:00:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-03 04:00:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-03 04:00:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-03 04:00:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 04:00:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 04:00:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 04:00:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 04:00:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_remove_one [2022-11-03 04:00:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_remove_one [2022-11-03 04:00:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:00:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 04:00:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 04:00:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_69 [2022-11-03 04:00:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_69 [2022-11-03 04:00:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2022-11-03 04:00:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2022-11-03 04:00:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2022-11-03 04:00:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2022-11-03 04:00:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-03 04:00:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-03 04:00:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2022-11-03 04:00:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2022-11-03 04:00:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-03 04:00:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-03 04:00:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:00:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_timer [2022-11-03 04:00:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_timer [2022-11-03 04:00:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 04:00:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 04:00:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2022-11-03 04:00:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2022-11-03 04:00:22,438 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:00:22,444 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:00:22,673 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 04:00:26,307 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-03 04:00:26,415 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:00:28,145 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:00:28,146 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 04:00:28,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:00:28 BoogieIcfgContainer [2022-11-03 04:00:28,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:00:28,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:00:28,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:00:28,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:00:28,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:00:16" (1/3) ... [2022-11-03 04:00:28,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72dde252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:00:28, skipping insertion in model container [2022-11-03 04:00:28,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:00:20" (2/3) ... [2022-11-03 04:00:28,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72dde252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:00:28, skipping insertion in model container [2022-11-03 04:00:28,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:00:28" (3/3) ... [2022-11-03 04:00:28,170 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2022-11-03 04:00:28,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:00:28,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-03 04:00:28,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:00:28,306 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70b10b0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:00:28,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-03 04:00:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) [2022-11-03 04:00:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 04:00:28,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:28,343 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 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] [2022-11-03 04:00:28,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1151251440, now seen corresponding path program 1 times [2022-11-03 04:00:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127990066] [2022-11-03 04:00:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:28,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-03 04:00:29,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127990066] [2022-11-03 04:00:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127990066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:29,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:29,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:29,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508743989] [2022-11-03 04:00:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:29,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:29,468 INFO L87 Difference]: Start difference. First operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:00:33,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:33,865 INFO L93 Difference]: Finished difference Result 3213 states and 4751 transitions. [2022-11-03 04:00:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 115 [2022-11-03 04:00:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:33,907 INFO L225 Difference]: With dead ends: 3213 [2022-11-03 04:00:33,908 INFO L226 Difference]: Without dead ends: 2090 [2022-11-03 04:00:33,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:33,925 INFO L413 NwaCegarLoop]: 1729 mSDtfsCounter, 1439 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:33,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 3095 Invalid, 528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 04:00:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-11-03 04:00:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2085. [2022-11-03 04:00:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1228 states have (on average 1.3200325732899023) internal successors, (1621), 1280 states have internal predecessors, (1621), 711 states have call successors, (711), 144 states have call predecessors, (711), 143 states have return successors, (707), 681 states have call predecessors, (707), 707 states have call successors, (707) [2022-11-03 04:00:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 3039 transitions. [2022-11-03 04:00:34,207 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 3039 transitions. Word has length 115 [2022-11-03 04:00:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:34,209 INFO L495 AbstractCegarLoop]: Abstraction has 2085 states and 3039 transitions. [2022-11-03 04:00:34,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 04:00:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 3039 transitions. [2022-11-03 04:00:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 04:00:34,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:34,217 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:34,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:00:34,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 694955965, now seen corresponding path program 1 times [2022-11-03 04:00:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:34,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282065181] [2022-11-03 04:00:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-03 04:00:34,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282065181] [2022-11-03 04:00:34,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282065181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:34,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:34,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076060879] [2022-11-03 04:00:34,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:34,673 INFO L87 Difference]: Start difference. First operand 2085 states and 3039 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:00:38,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:38,901 INFO L93 Difference]: Finished difference Result 5802 states and 8445 transitions. [2022-11-03 04:00:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 113 [2022-11-03 04:00:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:38,934 INFO L225 Difference]: With dead ends: 5802 [2022-11-03 04:00:38,934 INFO L226 Difference]: Without dead ends: 3736 [2022-11-03 04:00:38,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:38,948 INFO L413 NwaCegarLoop]: 1743 mSDtfsCounter, 1277 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:38,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 3085 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 500 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 04:00:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2022-11-03 04:00:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3706. [2022-11-03 04:00:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2177 states have (on average 1.3201653651814425) internal successors, (2874), 2274 states have internal predecessors, (2874), 1252 states have call successors, (1252), 277 states have call predecessors, (1252), 274 states have return successors, (1264), 1189 states have call predecessors, (1264), 1248 states have call successors, (1264) [2022-11-03 04:00:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5390 transitions. [2022-11-03 04:00:39,290 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5390 transitions. Word has length 113 [2022-11-03 04:00:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:39,291 INFO L495 AbstractCegarLoop]: Abstraction has 3706 states and 5390 transitions. [2022-11-03 04:00:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:00:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5390 transitions. [2022-11-03 04:00:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:00:39,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:39,301 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:39,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:00:39,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1974134420, now seen corresponding path program 1 times [2022-11-03 04:00:39,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51153186] [2022-11-03 04:00:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:39,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-03 04:00:39,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:39,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51153186] [2022-11-03 04:00:39,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51153186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:39,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987843431] [2022-11-03 04:00:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:39,618 INFO L87 Difference]: Start difference. First operand 3706 states and 5390 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 04:00:42,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:43,483 INFO L93 Difference]: Finished difference Result 8656 states and 12545 transitions. [2022-11-03 04:00:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:43,485 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2022-11-03 04:00:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:43,513 INFO L225 Difference]: With dead ends: 8656 [2022-11-03 04:00:43,514 INFO L226 Difference]: Without dead ends: 4969 [2022-11-03 04:00:43,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:43,528 INFO L413 NwaCegarLoop]: 1700 mSDtfsCounter, 1284 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:43,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 3048 Invalid, 533 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 04:00:43,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2022-11-03 04:00:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 4942. [2022-11-03 04:00:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4942 states, 2868 states have (on average 1.3057880055788005) internal successors, (3745), 3007 states have internal predecessors, (3745), 1680 states have call successors, (1680), 395 states have call predecessors, (1680), 391 states have return successors, (1703), 1586 states have call predecessors, (1703), 1676 states have call successors, (1703) [2022-11-03 04:00:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4942 states to 4942 states and 7128 transitions. [2022-11-03 04:00:43,827 INFO L78 Accepts]: Start accepts. Automaton has 4942 states and 7128 transitions. Word has length 117 [2022-11-03 04:00:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:43,830 INFO L495 AbstractCegarLoop]: Abstraction has 4942 states and 7128 transitions. [2022-11-03 04:00:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 04:00:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4942 states and 7128 transitions. [2022-11-03 04:00:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 04:00:43,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:43,837 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:43,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:00:43,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash 837874871, now seen corresponding path program 1 times [2022-11-03 04:00:43,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:43,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439211594] [2022-11-03 04:00:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-11-03 04:00:44,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439211594] [2022-11-03 04:00:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439211594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:44,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:44,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:44,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24262001] [2022-11-03 04:00:44,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:44,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:44,463 INFO L87 Difference]: Start difference. First operand 4942 states and 7128 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:00:48,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:49,121 INFO L93 Difference]: Finished difference Result 6541 states and 9406 transitions. [2022-11-03 04:00:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 158 [2022-11-03 04:00:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:49,167 INFO L225 Difference]: With dead ends: 6541 [2022-11-03 04:00:49,168 INFO L226 Difference]: Without dead ends: 6539 [2022-11-03 04:00:49,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:49,177 INFO L413 NwaCegarLoop]: 1691 mSDtfsCounter, 1270 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:49,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 6418 Invalid, 1009 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:00:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-11-03 04:00:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6532. [2022-11-03 04:00:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 3776 states have (on average 1.30323093220339) internal successors, (4921), 3961 states have internal predecessors, (4921), 2226 states have call successors, (2226), 533 states have call predecessors, (2226), 527 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2022-11-03 04:00:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9400 transitions. [2022-11-03 04:00:49,624 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9400 transitions. Word has length 158 [2022-11-03 04:00:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:49,626 INFO L495 AbstractCegarLoop]: Abstraction has 6532 states and 9400 transitions. [2022-11-03 04:00:49,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 04:00:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9400 transitions. [2022-11-03 04:00:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 04:00:49,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:49,633 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:49,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:00:49,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1042742978, now seen corresponding path program 1 times [2022-11-03 04:00:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:49,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657570965] [2022-11-03 04:00:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-11-03 04:00:50,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657570965] [2022-11-03 04:00:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657570965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:50,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:50,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075313938] [2022-11-03 04:00:50,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:50,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:50,235 INFO L87 Difference]: Start difference. First operand 6532 states and 9400 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 04:00:53,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:54,805 INFO L93 Difference]: Finished difference Result 6545 states and 9409 transitions. [2022-11-03 04:00:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 163 [2022-11-03 04:00:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:54,846 INFO L225 Difference]: With dead ends: 6545 [2022-11-03 04:00:54,846 INFO L226 Difference]: Without dead ends: 6543 [2022-11-03 04:00:54,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:54,852 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:54,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:00:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6543 states. [2022-11-03 04:00:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6543 to 6536. [2022-11-03 04:00:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 3779 states have (on average 1.3029902090500132) internal successors, (4924), 3964 states have internal predecessors, (4924), 2226 states have call successors, (2226), 534 states have call predecessors, (2226), 528 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2022-11-03 04:00:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 9403 transitions. [2022-11-03 04:00:55,451 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 9403 transitions. Word has length 163 [2022-11-03 04:00:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:55,452 INFO L495 AbstractCegarLoop]: Abstraction has 6536 states and 9403 transitions. [2022-11-03 04:00:55,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 04:00:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 9403 transitions. [2022-11-03 04:00:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 04:00:55,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:55,461 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:55,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:00:55,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:00:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:55,462 INFO L85 PathProgramCache]: Analyzing trace with hash -655977125, now seen corresponding path program 1 times [2022-11-03 04:00:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:55,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501400792] [2022-11-03 04:00:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-11-03 04:00:56,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501400792] [2022-11-03 04:00:56,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501400792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:56,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:56,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420760699] [2022-11-03 04:00:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:56,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:56,118 INFO L87 Difference]: Start difference. First operand 6536 states and 9403 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:00:59,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:00,615 INFO L93 Difference]: Finished difference Result 6549 states and 9412 transitions. [2022-11-03 04:01:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2022-11-03 04:01:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:00,659 INFO L225 Difference]: With dead ends: 6549 [2022-11-03 04:01:00,659 INFO L226 Difference]: Without dead ends: 6547 [2022-11-03 04:01:00,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:00,665 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:00,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:01:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2022-11-03 04:01:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 6540. [2022-11-03 04:01:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 3782 states have (on average 1.3027498677948175) internal successors, (4927), 3967 states have internal predecessors, (4927), 2226 states have call successors, (2226), 535 states have call predecessors, (2226), 529 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2022-11-03 04:01:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 9406 transitions. [2022-11-03 04:01:01,120 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 9406 transitions. Word has length 169 [2022-11-03 04:01:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:01,120 INFO L495 AbstractCegarLoop]: Abstraction has 6540 states and 9406 transitions. [2022-11-03 04:01:01,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:01:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 9406 transitions. [2022-11-03 04:01:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 04:01:01,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:01,127 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 9, 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] [2022-11-03 04:01:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:01:01,128 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1025455084, now seen corresponding path program 1 times [2022-11-03 04:01:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:01,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128923528] [2022-11-03 04:01:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-11-03 04:01:01,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128923528] [2022-11-03 04:01:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128923528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:01,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:01,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:01:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351895162] [2022-11-03 04:01:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:01,438 INFO L87 Difference]: Start difference. First operand 6540 states and 9406 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 04:01:04,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:05,320 INFO L93 Difference]: Finished difference Result 14262 states and 20500 transitions. [2022-11-03 04:01:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:05,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2022-11-03 04:01:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:05,362 INFO L225 Difference]: With dead ends: 14262 [2022-11-03 04:01:05,362 INFO L226 Difference]: Without dead ends: 7759 [2022-11-03 04:01:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:05,387 INFO L413 NwaCegarLoop]: 2001 mSDtfsCounter, 971 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:05,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 3348 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 669 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 04:01:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2022-11-03 04:01:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7695. [2022-11-03 04:01:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7695 states, 4591 states have (on average 1.3014593770420388) internal successors, (5975), 4788 states have internal predecessors, (5975), 2481 states have call successors, (2481), 631 states have call predecessors, (2481), 620 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2022-11-03 04:01:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7695 states to 7695 states and 10956 transitions. [2022-11-03 04:01:05,906 INFO L78 Accepts]: Start accepts. Automaton has 7695 states and 10956 transitions. Word has length 165 [2022-11-03 04:01:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:05,907 INFO L495 AbstractCegarLoop]: Abstraction has 7695 states and 10956 transitions. [2022-11-03 04:01:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 04:01:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7695 states and 10956 transitions. [2022-11-03 04:01:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 04:01:05,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:05,912 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:01:05,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1266439834, now seen corresponding path program 1 times [2022-11-03 04:01:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096522259] [2022-11-03 04:01:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:05,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2022-11-03 04:01:06,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:06,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096522259] [2022-11-03 04:01:06,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096522259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:06,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:06,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931525855] [2022-11-03 04:01:06,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:06,443 INFO L87 Difference]: Start difference. First operand 7695 states and 10956 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2022-11-03 04:01:11,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:11,739 INFO L93 Difference]: Finished difference Result 7705 states and 10965 transitions. [2022-11-03 04:01:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:01:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 174 [2022-11-03 04:01:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:11,771 INFO L225 Difference]: With dead ends: 7705 [2022-11-03 04:01:11,771 INFO L226 Difference]: Without dead ends: 7703 [2022-11-03 04:01:11,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:11,775 INFO L413 NwaCegarLoop]: 1384 mSDtfsCounter, 1577 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 4133 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:11,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 4133 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 762 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 04:01:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2022-11-03 04:01:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 7703. [2022-11-03 04:01:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7703 states, 4597 states have (on average 1.3010659125516641) internal successors, (5981), 4794 states have internal predecessors, (5981), 2481 states have call successors, (2481), 633 states have call predecessors, (2481), 622 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2022-11-03 04:01:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 10962 transitions. [2022-11-03 04:01:12,239 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 10962 transitions. Word has length 174 [2022-11-03 04:01:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:12,240 INFO L495 AbstractCegarLoop]: Abstraction has 7703 states and 10962 transitions. [2022-11-03 04:01:12,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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) [2022-11-03 04:01:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 10962 transitions. [2022-11-03 04:01:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 04:01:12,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:12,246 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:12,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:01:12,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash -252339077, now seen corresponding path program 1 times [2022-11-03 04:01:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:12,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407554138] [2022-11-03 04:01:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:12,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-03 04:01:12,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:12,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407554138] [2022-11-03 04:01:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407554138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:12,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:12,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167282420] [2022-11-03 04:01:12,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:12,711 INFO L87 Difference]: Start difference. First operand 7703 states and 10962 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 04:01:16,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:17,392 INFO L93 Difference]: Finished difference Result 7716 states and 10971 transitions. [2022-11-03 04:01:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 179 [2022-11-03 04:01:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:17,435 INFO L225 Difference]: With dead ends: 7716 [2022-11-03 04:01:17,436 INFO L226 Difference]: Without dead ends: 7714 [2022-11-03 04:01:17,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:17,442 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:17,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:01:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2022-11-03 04:01:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7707. [2022-11-03 04:01:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 4600 states have (on average 1.3008695652173914) internal successors, (5984), 4797 states have internal predecessors, (5984), 2481 states have call successors, (2481), 634 states have call predecessors, (2481), 623 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2022-11-03 04:01:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10965 transitions. [2022-11-03 04:01:17,926 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10965 transitions. Word has length 179 [2022-11-03 04:01:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:17,927 INFO L495 AbstractCegarLoop]: Abstraction has 7707 states and 10965 transitions. [2022-11-03 04:01:17,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 04:01:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10965 transitions. [2022-11-03 04:01:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 04:01:17,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:17,933 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:01:17,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -498802152, now seen corresponding path program 1 times [2022-11-03 04:01:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:17,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088164043] [2022-11-03 04:01:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-11-03 04:01:18,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088164043] [2022-11-03 04:01:18,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088164043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:18,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:18,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832595265] [2022-11-03 04:01:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:18,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:18,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:18,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:18,396 INFO L87 Difference]: Start difference. First operand 7707 states and 10965 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-03 04:01:21,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:22,832 INFO L93 Difference]: Finished difference Result 7720 states and 10974 transitions. [2022-11-03 04:01:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:22,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 182 [2022-11-03 04:01:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:22,868 INFO L225 Difference]: With dead ends: 7720 [2022-11-03 04:01:22,868 INFO L226 Difference]: Without dead ends: 7718 [2022-11-03 04:01:22,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:22,874 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1266 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:22,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 04:01:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2022-11-03 04:01:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 7711. [2022-11-03 04:01:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7711 states, 4603 states have (on average 1.3006734738214207) internal successors, (5987), 4800 states have internal predecessors, (5987), 2481 states have call successors, (2481), 635 states have call predecessors, (2481), 624 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2022-11-03 04:01:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7711 states to 7711 states and 10968 transitions. [2022-11-03 04:01:23,353 INFO L78 Accepts]: Start accepts. Automaton has 7711 states and 10968 transitions. Word has length 182 [2022-11-03 04:01:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:23,355 INFO L495 AbstractCegarLoop]: Abstraction has 7711 states and 10968 transitions. [2022-11-03 04:01:23,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-03 04:01:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7711 states and 10968 transitions. [2022-11-03 04:01:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-03 04:01:23,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:23,362 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:01:23,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1611185981, now seen corresponding path program 1 times [2022-11-03 04:01:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:23,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658801527] [2022-11-03 04:01:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2022-11-03 04:01:23,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658801527] [2022-11-03 04:01:23,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658801527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:23,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:23,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407427618] [2022-11-03 04:01:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:23,860 INFO L87 Difference]: Start difference. First operand 7711 states and 10968 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 04:01:27,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:28,710 INFO L93 Difference]: Finished difference Result 12272 states and 17455 transitions. [2022-11-03 04:01:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 187 [2022-11-03 04:01:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:28,771 INFO L225 Difference]: With dead ends: 12272 [2022-11-03 04:01:28,771 INFO L226 Difference]: Without dead ends: 12270 [2022-11-03 04:01:28,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:28,781 INFO L413 NwaCegarLoop]: 1816 mSDtfsCounter, 1252 mSDsluCounter, 5795 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 6783 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 6783 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1144 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 04:01:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2022-11-03 04:01:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 12259. [2022-11-03 04:01:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12259 states, 7295 states have (on average 1.304043865661412) internal successors, (9513), 7623 states have internal predecessors, (9513), 3948 states have call successors, (3948), 1041 states have call predecessors, (3948), 1013 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2022-11-03 04:01:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12259 states to 12259 states and 17443 transitions. [2022-11-03 04:01:29,536 INFO L78 Accepts]: Start accepts. Automaton has 12259 states and 17443 transitions. Word has length 187 [2022-11-03 04:01:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:29,537 INFO L495 AbstractCegarLoop]: Abstraction has 12259 states and 17443 transitions. [2022-11-03 04:01:29,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 04:01:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 12259 states and 17443 transitions. [2022-11-03 04:01:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 04:01:29,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:29,543 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:29,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:01:29,544 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1650944248, now seen corresponding path program 1 times [2022-11-03 04:01:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441238959] [2022-11-03 04:01:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-11-03 04:01:29,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:29,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441238959] [2022-11-03 04:01:29,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441238959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:29,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:29,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44573444] [2022-11-03 04:01:29,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:29,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:29,981 INFO L87 Difference]: Start difference. First operand 12259 states and 17443 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 04:01:33,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:34,768 INFO L93 Difference]: Finished difference Result 12272 states and 17452 transitions. [2022-11-03 04:01:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 192 [2022-11-03 04:01:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:34,823 INFO L225 Difference]: With dead ends: 12272 [2022-11-03 04:01:34,823 INFO L226 Difference]: Without dead ends: 12270 [2022-11-03 04:01:34,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:34,832 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1266 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:34,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:01:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2022-11-03 04:01:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 12263. [2022-11-03 04:01:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12263 states, 7298 states have (on average 1.3039188818854481) internal successors, (9516), 7626 states have internal predecessors, (9516), 3948 states have call successors, (3948), 1042 states have call predecessors, (3948), 1014 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2022-11-03 04:01:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12263 states to 12263 states and 17446 transitions. [2022-11-03 04:01:35,626 INFO L78 Accepts]: Start accepts. Automaton has 12263 states and 17446 transitions. Word has length 192 [2022-11-03 04:01:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:35,627 INFO L495 AbstractCegarLoop]: Abstraction has 12263 states and 17446 transitions. [2022-11-03 04:01:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 04:01:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12263 states and 17446 transitions. [2022-11-03 04:01:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-03 04:01:35,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:35,633 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 9, 8, 8, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:35,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:01:35,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1672377655, now seen corresponding path program 1 times [2022-11-03 04:01:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523900316] [2022-11-03 04:01:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2022-11-03 04:01:36,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:36,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523900316] [2022-11-03 04:01:36,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523900316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:36,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:36,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141258268] [2022-11-03 04:01:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:36,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:36,057 INFO L87 Difference]: Start difference. First operand 12263 states and 17446 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 04:01:39,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:40,871 INFO L93 Difference]: Finished difference Result 12276 states and 17455 transitions. [2022-11-03 04:01:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:40,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 198 [2022-11-03 04:01:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:40,927 INFO L225 Difference]: With dead ends: 12276 [2022-11-03 04:01:40,928 INFO L226 Difference]: Without dead ends: 12274 [2022-11-03 04:01:40,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:40,937 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 04:01:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2022-11-03 04:01:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 12267. [2022-11-03 04:01:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 7301 states have (on average 1.3037940008218052) internal successors, (9519), 7629 states have internal predecessors, (9519), 3948 states have call successors, (3948), 1043 states have call predecessors, (3948), 1015 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2022-11-03 04:01:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 17449 transitions. [2022-11-03 04:01:41,774 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 17449 transitions. Word has length 198 [2022-11-03 04:01:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:41,774 INFO L495 AbstractCegarLoop]: Abstraction has 12267 states and 17449 transitions. [2022-11-03 04:01:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 04:01:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 17449 transitions. [2022-11-03 04:01:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-03 04:01:41,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:41,781 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:41,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:01:41,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash 282284986, now seen corresponding path program 1 times [2022-11-03 04:01:41,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:41,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72410107] [2022-11-03 04:01:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-11-03 04:01:42,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72410107] [2022-11-03 04:01:42,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72410107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:42,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:42,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852674447] [2022-11-03 04:01:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:42,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:42,217 INFO L87 Difference]: Start difference. First operand 12267 states and 17449 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 04:01:45,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:46,992 INFO L93 Difference]: Finished difference Result 12280 states and 17458 transitions. [2022-11-03 04:01:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 204 [2022-11-03 04:01:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,044 INFO L225 Difference]: With dead ends: 12280 [2022-11-03 04:01:47,044 INFO L226 Difference]: Without dead ends: 12278 [2022-11-03 04:01:47,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:47,054 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:47,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 04:01:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12278 states. [2022-11-03 04:01:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12278 to 12271. [2022-11-03 04:01:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12271 states, 7304 states have (on average 1.3036692223439212) internal successors, (9522), 7632 states have internal predecessors, (9522), 3948 states have call successors, (3948), 1044 states have call predecessors, (3948), 1016 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2022-11-03 04:01:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12271 states to 12271 states and 17452 transitions. [2022-11-03 04:01:47,937 INFO L78 Accepts]: Start accepts. Automaton has 12271 states and 17452 transitions. Word has length 204 [2022-11-03 04:01:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,938 INFO L495 AbstractCegarLoop]: Abstraction has 12271 states and 17452 transitions. [2022-11-03 04:01:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 04:01:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12271 states and 17452 transitions. [2022-11-03 04:01:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 04:01:47,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,945 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:47,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:01:47,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1883565955, now seen corresponding path program 1 times [2022-11-03 04:01:47,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615711773] [2022-11-03 04:01:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-03 04:01:48,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:48,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615711773] [2022-11-03 04:01:48,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615711773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:48,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:48,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:48,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105394350] [2022-11-03 04:01:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:48,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:48,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:48,456 INFO L87 Difference]: Start difference. First operand 12271 states and 17452 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 04:01:51,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:53,201 INFO L93 Difference]: Finished difference Result 12284 states and 17461 transitions. [2022-11-03 04:01:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 207 [2022-11-03 04:01:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:53,248 INFO L225 Difference]: With dead ends: 12284 [2022-11-03 04:01:53,248 INFO L226 Difference]: Without dead ends: 12280 [2022-11-03 04:01:53,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:53,254 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1266 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:53,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 04:01:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12280 states. [2022-11-03 04:01:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12280 to 12273. [2022-11-03 04:01:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12273 states, 7306 states have (on average 1.3034492198193266) internal successors, (9523), 7633 states have internal predecessors, (9523), 3948 states have call successors, (3948), 1045 states have call predecessors, (3948), 1016 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2022-11-03 04:01:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12273 states to 12273 states and 17453 transitions. [2022-11-03 04:01:53,918 INFO L78 Accepts]: Start accepts. Automaton has 12273 states and 17453 transitions. Word has length 207 [2022-11-03 04:01:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:53,919 INFO L495 AbstractCegarLoop]: Abstraction has 12273 states and 17453 transitions. [2022-11-03 04:01:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 04:01:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 12273 states and 17453 transitions. [2022-11-03 04:01:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-03 04:01:53,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:53,928 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 11, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 04:01:53,928 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:01:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1476847590, now seen corresponding path program 1 times [2022-11-03 04:01:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483614824] [2022-11-03 04:01:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2022-11-03 04:01:54,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483614824] [2022-11-03 04:01:54,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483614824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:54,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:54,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:01:54,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114506075] [2022-11-03 04:01:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:54,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:01:54,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:01:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:01:54,447 INFO L87 Difference]: Start difference. First operand 12273 states and 17453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 04:01:57,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:01:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:59,118 INFO L93 Difference]: Finished difference Result 12280 states and 17457 transitions. [2022-11-03 04:01:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:01:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 214 [2022-11-03 04:01:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:59,164 INFO L225 Difference]: With dead ends: 12280 [2022-11-03 04:01:59,164 INFO L226 Difference]: Without dead ends: 12185 [2022-11-03 04:01:59,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:01:59,172 INFO L413 NwaCegarLoop]: 1694 mSDtfsCounter, 1261 mSDsluCounter, 5468 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:59,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 6423 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1002 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 04:01:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2022-11-03 04:02:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 12180. [2022-11-03 04:02:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12180 states, 7265 states have (on average 1.3035099793530627) internal successors, (9470), 7581 states have internal predecessors, (9470), 3909 states have call successors, (3909), 1028 states have call predecessors, (3909), 1003 states have return successors, (3947), 3661 states have call predecessors, (3947), 3901 states have call successors, (3947) [2022-11-03 04:02:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 17326 transitions. [2022-11-03 04:02:00,197 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 17326 transitions. Word has length 214 [2022-11-03 04:02:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:00,198 INFO L495 AbstractCegarLoop]: Abstraction has 12180 states and 17326 transitions. [2022-11-03 04:02:00,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 04:02:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 17326 transitions. [2022-11-03 04:02:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-03 04:02:00,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:00,207 INFO L195 NwaCegarLoop]: trace histogram [15, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 04:02:00,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:02:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1819122588, now seen corresponding path program 1 times [2022-11-03 04:02:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265412679] [2022-11-03 04:02:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-11-03 04:02:00,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265412679] [2022-11-03 04:02:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265412679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:00,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:00,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:02:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163968185] [2022-11-03 04:02:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:00,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:00,574 INFO L87 Difference]: Start difference. First operand 12180 states and 17326 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 04:02:04,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:02:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:05,226 INFO L93 Difference]: Finished difference Result 28156 states and 40083 transitions. [2022-11-03 04:02:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:05,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 213 [2022-11-03 04:02:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:05,284 INFO L225 Difference]: With dead ends: 28156 [2022-11-03 04:02:05,285 INFO L226 Difference]: Without dead ends: 16153 [2022-11-03 04:02:05,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:05,324 INFO L413 NwaCegarLoop]: 2167 mSDtfsCounter, 976 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 3512 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 705 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 04:02:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16153 states. [2022-11-03 04:02:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16153 to 16083. [2022-11-03 04:02:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 9712 states have (on average 1.3021004942339374) internal successors, (12646), 10110 states have internal predecessors, (12646), 5037 states have call successors, (5037), 1369 states have call predecessors, (5037), 1331 states have return successors, (5075), 4712 states have call predecessors, (5075), 5029 states have call successors, (5075) [2022-11-03 04:02:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 22758 transitions. [2022-11-03 04:02:06,107 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 22758 transitions. Word has length 213 [2022-11-03 04:02:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:06,108 INFO L495 AbstractCegarLoop]: Abstraction has 16083 states and 22758 transitions. [2022-11-03 04:02:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 04:02:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 22758 transitions. [2022-11-03 04:02:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-03 04:02:06,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:06,116 INFO L195 NwaCegarLoop]: trace histogram [17, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:06,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 04:02:06,117 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:02:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2021355704, now seen corresponding path program 1 times [2022-11-03 04:02:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20805188] [2022-11-03 04:02:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-11-03 04:02:06,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20805188] [2022-11-03 04:02:06,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20805188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:06,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:06,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193928704] [2022-11-03 04:02:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:06,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:06,937 INFO L87 Difference]: Start difference. First operand 16083 states and 22758 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 04:02:10,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:02:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:11,872 INFO L93 Difference]: Finished difference Result 16097 states and 22770 transitions. [2022-11-03 04:02:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 276 [2022-11-03 04:02:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:11,923 INFO L225 Difference]: With dead ends: 16097 [2022-11-03 04:02:11,923 INFO L226 Difference]: Without dead ends: 16095 [2022-11-03 04:02:11,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:11,932 INFO L413 NwaCegarLoop]: 1842 mSDtfsCounter, 1222 mSDsluCounter, 5868 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 6878 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:11,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 6878 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1139 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 04:02:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16095 states. [2022-11-03 04:02:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16095 to 16083. [2022-11-03 04:02:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 9712 states have (on average 1.3008649093904447) internal successors, (12634), 10110 states have internal predecessors, (12634), 5037 states have call successors, (5037), 1369 states have call predecessors, (5037), 1331 states have return successors, (5075), 4712 states have call predecessors, (5075), 5029 states have call successors, (5075) [2022-11-03 04:02:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 22746 transitions. [2022-11-03 04:02:12,881 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 22746 transitions. Word has length 276 [2022-11-03 04:02:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:12,881 INFO L495 AbstractCegarLoop]: Abstraction has 16083 states and 22746 transitions. [2022-11-03 04:02:12,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 04:02:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 22746 transitions. [2022-11-03 04:02:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-03 04:02:12,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:12,892 INFO L195 NwaCegarLoop]: trace histogram [17, 11, 11, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 04:02:12,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:02:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1245235507, now seen corresponding path program 1 times [2022-11-03 04:02:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976311203] [2022-11-03 04:02:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-03 04:02:13,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976311203] [2022-11-03 04:02:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976311203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:13,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:13,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098115319] [2022-11-03 04:02:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:13,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:13,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:13,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:13,526 INFO L87 Difference]: Start difference. First operand 16083 states and 22746 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 04:02:17,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:02:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:18,223 INFO L93 Difference]: Finished difference Result 16492 states and 23169 transitions. [2022-11-03 04:02:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 295 [2022-11-03 04:02:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:18,278 INFO L225 Difference]: With dead ends: 16492 [2022-11-03 04:02:18,278 INFO L226 Difference]: Without dead ends: 16490 [2022-11-03 04:02:18,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:18,288 INFO L413 NwaCegarLoop]: 1444 mSDtfsCounter, 331 mSDsluCounter, 4835 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:18,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 5518 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1042 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 04:02:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16490 states. [2022-11-03 04:02:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16490 to 16490. [2022-11-03 04:02:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16490 states, 9928 states have (on average 1.2943190975020145) internal successors, (12850), 10329 states have internal predecessors, (12850), 5134 states have call successors, (5134), 1464 states have call predecessors, (5134), 1426 states have return successors, (5172), 4809 states have call predecessors, (5172), 5126 states have call successors, (5172) [2022-11-03 04:02:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16490 states to 16490 states and 23156 transitions. [2022-11-03 04:02:19,228 INFO L78 Accepts]: Start accepts. Automaton has 16490 states and 23156 transitions. Word has length 295 [2022-11-03 04:02:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:19,229 INFO L495 AbstractCegarLoop]: Abstraction has 16490 states and 23156 transitions. [2022-11-03 04:02:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 04:02:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16490 states and 23156 transitions. [2022-11-03 04:02:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-03 04:02:19,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:19,246 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 04:02:19,249 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:02:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash 896564391, now seen corresponding path program 1 times [2022-11-03 04:02:19,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:19,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235842295] [2022-11-03 04:02:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:19,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:19,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:02:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832515745] [2022-11-03 04:02:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:19,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:19,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:19,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:02:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 4284 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:02:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-03 04:02:21,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:21,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235842295] [2022-11-03 04:02:21,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 04:02:21,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832515745] [2022-11-03 04:02:21,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832515745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:21,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:21,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:02:21,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232221793] [2022-11-03 04:02:21,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:21,046 INFO L87 Difference]: Start difference. First operand 16490 states and 23156 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 04:02:24,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:02:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:25,529 INFO L93 Difference]: Finished difference Result 39855 states and 57347 transitions. [2022-11-03 04:02:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 404 [2022-11-03 04:02:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:25,598 INFO L225 Difference]: With dead ends: 39855 [2022-11-03 04:02:25,598 INFO L226 Difference]: Without dead ends: 23542 [2022-11-03 04:02:25,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:02:25,633 INFO L413 NwaCegarLoop]: 1964 mSDtfsCounter, 417 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 3469 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 04:02:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23542 states. [2022-11-03 04:02:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23542 to 16500. [2022-11-03 04:02:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16500 states, 9938 states have (on average 1.2940229422418998) internal successors, (12860), 10339 states have internal predecessors, (12860), 5134 states have call successors, (5134), 1464 states have call predecessors, (5134), 1426 states have return successors, (5172), 4809 states have call predecessors, (5172), 5126 states have call successors, (5172) [2022-11-03 04:02:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 23166 transitions. [2022-11-03 04:02:26,553 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 23166 transitions. Word has length 404 [2022-11-03 04:02:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:26,554 INFO L495 AbstractCegarLoop]: Abstraction has 16500 states and 23166 transitions. [2022-11-03 04:02:26,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 04:02:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 23166 transitions. [2022-11-03 04:02:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-11-03 04:02:26,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:26,572 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:26,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 04:02:26,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:26,785 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 04:02:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1995644795, now seen corresponding path program 1 times [2022-11-03 04:02:26,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267843925] [2022-11-03 04:02:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267843925] [2022-11-03 04:02:27,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 04:02:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184522797] [2022-11-03 04:02:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:27,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:27,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4973280-23e5-4273-9787-b84e76410a10/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:02:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 4404 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 316 proven. 1 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-11-03 04:02:28,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2022-11-03 04:02:29,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184522797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:29,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054721948] [2022-11-03 04:02:29,381 INFO L159 IcfgInterpreter]: Started Sifa with 211 locations of interest [2022-11-03 04:02:29,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:29,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:29,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:29,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs