./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/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-smsc-epic100.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/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 08a377ea5583d5b51d35b7880dbbb43c3783bcaabfa79c83938a2c0ac78e3f7a --- 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 02:51:54,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:51:54,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:51:55,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:51:55,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:51:55,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:51:55,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:51:55,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:51:55,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:51:55,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:51:55,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:51:55,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:51:55,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:51:55,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:51:55,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:51:55,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:51:55,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:51:55,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:51:55,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:51:55,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:51:55,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:51:55,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:51:55,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:51:55,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:51:55,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:51:55,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:51:55,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:51:55,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:51:55,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:51:55,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:51:55,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:51:55,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:51:55,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:51:55,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:51:55,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:51:55,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:51:55,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:51:55,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:51:55,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:51:55,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:51:55,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:51:55,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:51:55,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:51:55,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:51:55,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:51:55,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:51:55,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:51:55,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:51:55,086 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:51:55,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:51:55,087 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:51:55,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:51:55,088 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:51:55,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:51:55,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:51:55,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:51:55,089 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:51:55,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:51:55,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:51:55,089 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:51:55,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:51:55,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:51:55,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:51:55,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:51:55,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:51:55,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:51:55,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:51:55,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:51:55,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:51:55,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:51:55,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:51:55,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:51:55,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:51:55,093 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:51:55,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:51:55,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:51:55,094 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:51:55,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:51:55,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:51:55,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:51:55,095 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08a377ea5583d5b51d35b7880dbbb43c3783bcaabfa79c83938a2c0ac78e3f7a [2022-11-03 02:51:55,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:51:55,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:51:55,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:51:55,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:51:55,457 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:51:55,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i [2022-11-03 02:51:55,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/data/24837a6b4/495d34b5222142519e14627cf03d0d13/FLAG90190c6ad [2022-11-03 02:51:56,390 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:51:56,392 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i [2022-11-03 02:51:56,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/data/24837a6b4/495d34b5222142519e14627cf03d0d13/FLAG90190c6ad [2022-11-03 02:51:56,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/data/24837a6b4/495d34b5222142519e14627cf03d0d13 [2022-11-03 02:51:56,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:51:56,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:51:56,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:51:56,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:51:56,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:51:56,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:51:56" (1/1) ... [2022-11-03 02:51:56,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40fc4563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:51:56, skipping insertion in model container [2022-11-03 02:51:56,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:51:56" (1/1) ... [2022-11-03 02:51:56,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:51:57,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:51:59,882 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[331922,331935] [2022-11-03 02:51:59,886 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332091,332104] [2022-11-03 02:51:59,886 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332258,332271] [2022-11-03 02:51:59,887 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332426,332439] [2022-11-03 02:51:59,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:51:59,980 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:52:00,389 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[331922,331935] [2022-11-03 02:52:00,389 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332091,332104] [2022-11-03 02:52:00,390 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332258,332271] [2022-11-03 02:52:00,391 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_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i[332426,332439] [2022-11-03 02:52:00,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:00,630 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:52:00,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00 WrapperNode [2022-11-03 02:52:00,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:00,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:00,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:52:00,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:52:00,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:00,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:00,908 INFO L138 Inliner]: procedures = 451, calls = 2015, calls flagged for inlining = 220, calls inlined = 194, statements flattened = 4549 [2022-11-03 02:52:00,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:00,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:52:00,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:52:00,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:52:00,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:00,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:00,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:00,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:52:01,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:52:01,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:52:01,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:52:01,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (1/1) ... [2022-11-03 02:52:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:01,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:52:01,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:52:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2022-11-03 02:52:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2022-11-03 02:52:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-03 02:52:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-03 02:52:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:52:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:52:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_begin [2022-11-03 02:52:01,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_begin [2022-11-03 02:52:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-03 02:52:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-03 02:52:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 02:52:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 02:52:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:52:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:52:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:52:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:52:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-03 02:52:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-03 02:52:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:52:01,261 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:52:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2022-11-03 02:52:01,261 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2022-11-03 02:52:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_73 [2022-11-03 02:52:01,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_73 [2022-11-03 02:52:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2022-11-03 02:52:01,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2022-11-03 02:52:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:52:01,262 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:52:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:52:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-03 02:52:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-03 02:52:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 02:52:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-03 02:52:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-03 02:52:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-03 02:52:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2022-11-03 02:52:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2022-11-03 02:52:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 02:52:01,264 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 02:52:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:52:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:52:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:52:01,265 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:52:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-03 02:52:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-03 02:52:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:52:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:52:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:52:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:52:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-03 02:52:01,268 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-03 02:52:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 02:52:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 02:52:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:52:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-03 02:52:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-03 02:52:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure epic_open [2022-11-03 02:52:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_open [2022-11-03 02:52:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:52:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-03 02:52:01,270 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-03 02:52:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-03 02:52:01,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-03 02:52:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:52:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:52:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-03 02:52:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-03 02:52:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-03 02:52:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-03 02:52:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-03 02:52:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-03 02:52:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-03 02:52:01,272 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-03 02:52:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-03 02:52:01,273 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-03 02:52:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure epic_restart [2022-11-03 02:52:01,273 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_restart [2022-11-03 02:52:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_epic_cleanup_14_2 [2022-11-03 02:52:01,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_epic_cleanup_14_2 [2022-11-03 02:52:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:52:01,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:52:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:52:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-03 02:52:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-03 02:52:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-03 02:52:01,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-03 02:52:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:52:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_nway_reset [2022-11-03 02:52:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_nway_reset [2022-11-03 02:52:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 02:52:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 02:52:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 02:52:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 02:52:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:52:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2022-11-03 02:52:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2022-11-03 02:52:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:52:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:52:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_epic_private [2022-11-03 02:52:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_epic_private [2022-11-03 02:52:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2022-11-03 02:52:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2022-11-03 02:52:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-03 02:52:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-03 02:52:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-03 02:52:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-03 02:52:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2022-11-03 02:52:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2022-11-03 02:52:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 02:52:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 02:52:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure epic_remove_one [2022-11-03 02:52:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_remove_one [2022-11-03 02:52:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-03 02:52:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-03 02:52:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_napi_lock_of_epic_private [2022-11-03 02:52:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_napi_lock_of_epic_private [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:52:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-03 02:52:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:52:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:52:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:52:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:52:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure epic_rx [2022-11-03 02:52:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_rx [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_complete [2022-11-03 02:52:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_complete [2022-11-03 02:52:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-03 02:52:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_napi_lock_of_epic_private [2022-11-03 02:52:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_napi_lock_of_epic_private [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-03 02:52:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:52:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 02:52:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-03 02:52:01,326 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-03 02:52:01,326 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-03 02:52:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_72 [2022-11-03 02:52:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_72 [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure epic_resume [2022-11-03 02:52:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_resume [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 02:52:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:52:01,327 INFO L130 BoogieDeclarations]: Found specification of procedure epic_tx_timeout [2022-11-03 02:52:01,327 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_tx_timeout [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-03 02:52:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:52:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-03 02:52:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-03 02:52:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-03 02:52:01,328 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 02:52:01,328 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 02:52:01,329 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure epic_close [2022-11-03 02:52:01,329 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_close [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:52:01,329 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:52:01,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:52:01,329 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-03 02:52:01,329 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_epic_private [2022-11-03 02:52:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_epic_private [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-03 02:52:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-03 02:52:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 02:52:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 02:52:01,330 INFO L130 BoogieDeclarations]: Found specification of procedure epic_pause [2022-11-03 02:52:01,330 INFO L138 BoogieDeclarations]: Found implementation of procedure epic_pause [2022-11-03 02:52:02,181 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:52:02,184 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:52:02,893 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:52:05,766 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-03 02:52:05,867 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:52:07,049 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:52:07,050 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:52:07,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:07 BoogieIcfgContainer [2022-11-03 02:52:07,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:52:07,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:52:07,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:52:07,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:52:07,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:51:56" (1/3) ... [2022-11-03 02:52:07,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5820e77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:07, skipping insertion in model container [2022-11-03 02:52:07,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:00" (2/3) ... [2022-11-03 02:52:07,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5820e77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:07, skipping insertion in model container [2022-11-03 02:52:07,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:07" (3/3) ... [2022-11-03 02:52:07,073 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-smsc-epic100.cil.i [2022-11-03 02:52:07,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:52:07,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-03 02:52:07,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:52:07,214 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;@5f922089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:52:07,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-03 02:52:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 1244 states, 714 states have (on average 1.2997198879551821) internal successors, (928), 748 states have internal predecessors, (928), 441 states have call successors, (441), 87 states have call predecessors, (441), 86 states have return successors, (435), 430 states have call predecessors, (435), 435 states have call successors, (435) [2022-11-03 02:52:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:52:07,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:07,255 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] [2022-11-03 02:52:07,256 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 02:52:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash -709225583, now seen corresponding path program 1 times [2022-11-03 02:52:07,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:07,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235359350] [2022-11-03 02:52:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:08,183 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 02:52:08,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:08,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235359350] [2022-11-03 02:52:08,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235359350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:08,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:08,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:08,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782456495] [2022-11-03 02:52:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:08,235 INFO L87 Difference]: Start difference. First operand has 1244 states, 714 states have (on average 1.2997198879551821) internal successors, (928), 748 states have internal predecessors, (928), 441 states have call successors, (441), 87 states have call predecessors, (441), 86 states have return successors, (435), 430 states have call predecessors, (435), 435 states have call successors, (435) 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:52:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:10,115 INFO L93 Difference]: Finished difference Result 3619 states and 5297 transitions. [2022-11-03 02:52:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:10,121 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 111 [2022-11-03 02:52:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:10,163 INFO L225 Difference]: With dead ends: 3619 [2022-11-03 02:52:10,163 INFO L226 Difference]: Without dead ends: 2384 [2022-11-03 02:52:10,174 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 02:52:10,177 INFO L413 NwaCegarLoop]: 1937 mSDtfsCounter, 1685 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 3441 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:10,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 3441 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:52:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-11-03 02:52:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2380. [2022-11-03 02:52:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 1381 states have (on average 1.2932657494569153) internal successors, (1786), 1448 states have internal predecessors, (1786), 828 states have call successors, (828), 169 states have call predecessors, (828), 168 states have return successors, (824), 814 states have call predecessors, (824), 824 states have call successors, (824) [2022-11-03 02:52:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3438 transitions. [2022-11-03 02:52:10,414 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3438 transitions. Word has length 111 [2022-11-03 02:52:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:10,415 INFO L495 AbstractCegarLoop]: Abstraction has 2380 states and 3438 transitions. [2022-11-03 02:52:10,415 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, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:52:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3438 transitions. [2022-11-03 02:52:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 02:52:10,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:10,421 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, 1, 1] [2022-11-03 02:52:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:52:10,422 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 02:52:10,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1654300437, now seen corresponding path program 1 times [2022-11-03 02:52:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:10,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854471442] [2022-11-03 02:52:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:10,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:10,716 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 02:52:10,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854471442] [2022-11-03 02:52:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854471442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:10,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:10,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95790589] [2022-11-03 02:52:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:10,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:10,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:10,720 INFO L87 Difference]: Start difference. First operand 2380 states and 3438 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 02:52:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:12,440 INFO L93 Difference]: Finished difference Result 6768 states and 9748 transitions. [2022-11-03 02:52:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 119 [2022-11-03 02:52:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:12,471 INFO L225 Difference]: With dead ends: 6768 [2022-11-03 02:52:12,471 INFO L226 Difference]: Without dead ends: 4407 [2022-11-03 02:52:12,482 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 02:52:12,483 INFO L413 NwaCegarLoop]: 1892 mSDtfsCounter, 1497 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:12,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 3365 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:52:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2022-11-03 02:52:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 4377. [2022-11-03 02:52:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 2542 states have (on average 1.2828481510621559) internal successors, (3261), 2670 states have internal predecessors, (3261), 1515 states have call successors, (1515), 320 states have call predecessors, (1515), 317 states have return successors, (1513), 1482 states have call predecessors, (1513), 1511 states have call successors, (1513) [2022-11-03 02:52:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 6289 transitions. [2022-11-03 02:52:12,836 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 6289 transitions. Word has length 119 [2022-11-03 02:52:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:12,836 INFO L495 AbstractCegarLoop]: Abstraction has 4377 states and 6289 transitions. [2022-11-03 02:52:12,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 02:52:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 6289 transitions. [2022-11-03 02:52:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:52:12,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:12,841 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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:52:12,841 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 02:52:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1237218887, now seen corresponding path program 1 times [2022-11-03 02:52:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257486688] [2022-11-03 02:52:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:13,279 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 02:52:13,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257486688] [2022-11-03 02:52:13,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257486688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:13,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:13,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:13,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219123293] [2022-11-03 02:52:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:13,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:13,283 INFO L87 Difference]: Start difference. First operand 4377 states and 6289 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:52:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:15,262 INFO L93 Difference]: Finished difference Result 12709 states and 18245 transitions. [2022-11-03 02:52:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:15,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 123 [2022-11-03 02:52:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:15,316 INFO L225 Difference]: With dead ends: 12709 [2022-11-03 02:52:15,316 INFO L226 Difference]: Without dead ends: 8351 [2022-11-03 02:52:15,337 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 02:52:15,339 INFO L413 NwaCegarLoop]: 2025 mSDtfsCounter, 1644 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 3496 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:15,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 3496 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:52:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2022-11-03 02:52:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 8317. [2022-11-03 02:52:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 4848 states have (on average 1.2807343234323432) internal successors, (6209), 5092 states have internal predecessors, (6209), 2855 states have call successors, (2855), 622 states have call predecessors, (2855), 611 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 11929 transitions. [2022-11-03 02:52:15,882 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 11929 transitions. Word has length 123 [2022-11-03 02:52:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:15,883 INFO L495 AbstractCegarLoop]: Abstraction has 8317 states and 11929 transitions. [2022-11-03 02:52:15,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:52:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 11929 transitions. [2022-11-03 02:52:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:52:15,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:15,887 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:52:15,888 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 02:52:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1930997087, now seen corresponding path program 1 times [2022-11-03 02:52:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121420745] [2022-11-03 02:52:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-11-03 02:52:16,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121420745] [2022-11-03 02:52:16,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121420745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:16,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644868307] [2022-11-03 02:52:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:16,405 INFO L87 Difference]: Start difference. First operand 8317 states and 11929 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:52:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:18,740 INFO L93 Difference]: Finished difference Result 8323 states and 11934 transitions. [2022-11-03 02:52:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 153 [2022-11-03 02:52:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:18,792 INFO L225 Difference]: With dead ends: 8323 [2022-11-03 02:52:18,792 INFO L226 Difference]: Without dead ends: 8321 [2022-11-03 02:52:18,800 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 02:52:18,801 INFO L413 NwaCegarLoop]: 1517 mSDtfsCounter, 1731 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:18,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 4537 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:52:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8321 states. [2022-11-03 02:52:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8321 to 8321. [2022-11-03 02:52:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8321 states, 4851 states have (on average 1.2805607091321376) internal successors, (6212), 5095 states have internal predecessors, (6212), 2855 states have call successors, (2855), 623 states have call predecessors, (2855), 612 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8321 states to 8321 states and 11932 transitions. [2022-11-03 02:52:19,445 INFO L78 Accepts]: Start accepts. Automaton has 8321 states and 11932 transitions. Word has length 153 [2022-11-03 02:52:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:19,447 INFO L495 AbstractCegarLoop]: Abstraction has 8321 states and 11932 transitions. [2022-11-03 02:52:19,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:52:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8321 states and 11932 transitions. [2022-11-03 02:52:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:52:19,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:19,456 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 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 02:52:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:52:19,457 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 02:52:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -975514298, now seen corresponding path program 1 times [2022-11-03 02:52:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804734977] [2022-11-03 02:52:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-11-03 02:52:19,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804734977] [2022-11-03 02:52:19,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804734977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:19,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:19,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035899944] [2022-11-03 02:52:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:19,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:19,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:19,963 INFO L87 Difference]: Start difference. First operand 8321 states and 11932 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, (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 02:52:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:22,439 INFO L93 Difference]: Finished difference Result 8327 states and 11937 transitions. [2022-11-03 02:52:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:22,439 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, (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 162 [2022-11-03 02:52:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:22,492 INFO L225 Difference]: With dead ends: 8327 [2022-11-03 02:52:22,492 INFO L226 Difference]: Without dead ends: 8325 [2022-11-03 02:52:22,499 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 02:52:22,500 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:52:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8325 states. [2022-11-03 02:52:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 8325. [2022-11-03 02:52:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 4854 states have (on average 1.2803873094355172) internal successors, (6215), 5098 states have internal predecessors, (6215), 2855 states have call successors, (2855), 624 states have call predecessors, (2855), 613 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 11935 transitions. [2022-11-03 02:52:23,268 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 11935 transitions. Word has length 162 [2022-11-03 02:52:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:23,269 INFO L495 AbstractCegarLoop]: Abstraction has 8325 states and 11935 transitions. [2022-11-03 02:52:23,269 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, (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 02:52:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 11935 transitions. [2022-11-03 02:52:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:52:23,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:23,279 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] [2022-11-03 02:52:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:52:23,279 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 02:52:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1851537415, now seen corresponding path program 1 times [2022-11-03 02:52:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700754421] [2022-11-03 02:52:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:23,815 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 02:52:23,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700754421] [2022-11-03 02:52:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700754421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:23,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909057259] [2022-11-03 02:52:23,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:23,820 INFO L87 Difference]: Start difference. First operand 8325 states and 11935 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, (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 02:52:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:25,945 INFO L93 Difference]: Finished difference Result 8331 states and 11940 transitions. [2022-11-03 02:52:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:25,946 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, (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 167 [2022-11-03 02:52:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:25,990 INFO L225 Difference]: With dead ends: 8331 [2022-11-03 02:52:25,990 INFO L226 Difference]: Without dead ends: 8329 [2022-11-03 02:52:25,996 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 02:52:25,997 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:25,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1735 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:52:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8329 states. [2022-11-03 02:52:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8329 to 8329. [2022-11-03 02:52:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 4857 states have (on average 1.280214123944822) internal successors, (6218), 5101 states have internal predecessors, (6218), 2855 states have call successors, (2855), 625 states have call predecessors, (2855), 614 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 11938 transitions. [2022-11-03 02:52:26,619 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 11938 transitions. Word has length 167 [2022-11-03 02:52:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:26,619 INFO L495 AbstractCegarLoop]: Abstraction has 8329 states and 11938 transitions. [2022-11-03 02:52:26,620 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, (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 02:52:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 11938 transitions. [2022-11-03 02:52:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:52:26,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:26,626 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:26,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:52:26,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:52:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash 287478776, now seen corresponding path program 1 times [2022-11-03 02:52:26,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:26,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016696483] [2022-11-03 02:52:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-11-03 02:52:27,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016696483] [2022-11-03 02:52:27,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016696483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:27,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:27,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:27,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696257989] [2022-11-03 02:52:27,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:27,085 INFO L87 Difference]: Start difference. First operand 8329 states and 11938 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 02:52:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:29,072 INFO L93 Difference]: Finished difference Result 8335 states and 11943 transitions. [2022-11-03 02:52:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:29,073 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 171 [2022-11-03 02:52:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:29,111 INFO L225 Difference]: With dead ends: 8335 [2022-11-03 02:52:29,111 INFO L226 Difference]: Without dead ends: 8333 [2022-11-03 02:52:29,116 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 02:52:29,117 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:29,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1734 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:52:29,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8333 states. [2022-11-03 02:52:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8333 to 8333. [2022-11-03 02:52:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 4860 states have (on average 1.2800411522633746) internal successors, (6221), 5104 states have internal predecessors, (6221), 2855 states have call successors, (2855), 626 states have call predecessors, (2855), 615 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 11941 transitions. [2022-11-03 02:52:29,738 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 11941 transitions. Word has length 171 [2022-11-03 02:52:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:29,739 INFO L495 AbstractCegarLoop]: Abstraction has 8333 states and 11941 transitions. [2022-11-03 02:52:29,740 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 02:52:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 11941 transitions. [2022-11-03 02:52:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-03 02:52:29,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:29,746 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] [2022-11-03 02:52:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:52:29,746 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 02:52:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 204405543, now seen corresponding path program 1 times [2022-11-03 02:52:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:29,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660788869] [2022-11-03 02:52:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:30,402 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 02:52:30,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660788869] [2022-11-03 02:52:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660788869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:30,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:30,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:30,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848326519] [2022-11-03 02:52:30,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:30,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:30,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:30,405 INFO L87 Difference]: Start difference. First operand 8333 states and 11941 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 02:52:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:33,004 INFO L93 Difference]: Finished difference Result 8339 states and 11946 transitions. [2022-11-03 02:52:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:33,005 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 177 [2022-11-03 02:52:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:33,046 INFO L225 Difference]: With dead ends: 8339 [2022-11-03 02:52:33,046 INFO L226 Difference]: Without dead ends: 8337 [2022-11-03 02:52:33,053 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 02:52:33,054 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:33,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:52:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8337 states. [2022-11-03 02:52:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8337 to 8337. [2022-11-03 02:52:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8337 states, 4863 states have (on average 1.279868393995476) internal successors, (6224), 5107 states have internal predecessors, (6224), 2855 states have call successors, (2855), 627 states have call predecessors, (2855), 616 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8337 states to 8337 states and 11944 transitions. [2022-11-03 02:52:33,783 INFO L78 Accepts]: Start accepts. Automaton has 8337 states and 11944 transitions. Word has length 177 [2022-11-03 02:52:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:33,783 INFO L495 AbstractCegarLoop]: Abstraction has 8337 states and 11944 transitions. [2022-11-03 02:52:33,784 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 02:52:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8337 states and 11944 transitions. [2022-11-03 02:52:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:52:33,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:33,790 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 6, 5, 5, 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] [2022-11-03 02:52:33,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:52:33,791 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 02:52:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1608458746, now seen corresponding path program 1 times [2022-11-03 02:52:33,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392198785] [2022-11-03 02:52:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:33,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-11-03 02:52:34,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:34,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392198785] [2022-11-03 02:52:34,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392198785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:34,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563148918] [2022-11-03 02:52:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:34,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:34,231 INFO L87 Difference]: Start difference. First operand 8337 states and 11944 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 02:52:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:36,400 INFO L93 Difference]: Finished difference Result 8343 states and 11949 transitions. [2022-11-03 02:52:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:36,401 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 182 [2022-11-03 02:52:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:36,437 INFO L225 Difference]: With dead ends: 8343 [2022-11-03 02:52:36,437 INFO L226 Difference]: Without dead ends: 8341 [2022-11-03 02:52:36,442 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 02:52:36,445 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:36,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1732 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:52:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2022-11-03 02:52:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 8341. [2022-11-03 02:52:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8341 states, 4866 states have (on average 1.2796958487464036) internal successors, (6227), 5110 states have internal predecessors, (6227), 2855 states have call successors, (2855), 628 states have call predecessors, (2855), 617 states have return successors, (2865), 2774 states have call predecessors, (2865), 2851 states have call successors, (2865) [2022-11-03 02:52:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8341 states to 8341 states and 11947 transitions. [2022-11-03 02:52:37,194 INFO L78 Accepts]: Start accepts. Automaton has 8341 states and 11947 transitions. Word has length 182 [2022-11-03 02:52:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 8341 states and 11947 transitions. [2022-11-03 02:52:37,196 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 02:52:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8341 states and 11947 transitions. [2022-11-03 02:52:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-03 02:52:37,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:37,205 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 7, 6, 6, 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] [2022-11-03 02:52:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:52:37,205 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 02:52:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -21887417, now seen corresponding path program 1 times [2022-11-03 02:52:37,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:37,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358247063] [2022-11-03 02:52:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:37,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2022-11-03 02:52:37,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358247063] [2022-11-03 02:52:37,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358247063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:37,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:37,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499016505] [2022-11-03 02:52:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:37,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:37,637 INFO L87 Difference]: Start difference. First operand 8341 states and 11947 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, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:52:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:39,731 INFO L93 Difference]: Finished difference Result 8533 states and 12149 transitions. [2022-11-03 02:52:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:39,731 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, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 187 [2022-11-03 02:52:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:39,774 INFO L225 Difference]: With dead ends: 8533 [2022-11-03 02:52:39,774 INFO L226 Difference]: Without dead ends: 8531 [2022-11-03 02:52:39,782 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 02:52:39,782 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 1692 mSDsluCounter, 3643 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:39,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 4636 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:52:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-11-03 02:52:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 8529. [2022-11-03 02:52:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8529 states, 4967 states have (on average 1.2760217435071473) internal successors, (6338), 5219 states have internal predecessors, (6338), 2899 states have call successors, (2899), 671 states have call predecessors, (2899), 660 states have return successors, (2909), 2818 states have call predecessors, (2909), 2895 states have call successors, (2909) [2022-11-03 02:52:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8529 states to 8529 states and 12146 transitions. [2022-11-03 02:52:40,804 INFO L78 Accepts]: Start accepts. Automaton has 8529 states and 12146 transitions. Word has length 187 [2022-11-03 02:52:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:40,804 INFO L495 AbstractCegarLoop]: Abstraction has 8529 states and 12146 transitions. [2022-11-03 02:52:40,805 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, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:52:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8529 states and 12146 transitions. [2022-11-03 02:52:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 02:52:40,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:40,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:52:40,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:52:40,813 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 02:52:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1073312494, now seen corresponding path program 1 times [2022-11-03 02:52:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:40,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669898945] [2022-11-03 02:52:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-11-03 02:52:41,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669898945] [2022-11-03 02:52:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669898945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:41,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:41,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:41,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170439157] [2022-11-03 02:52:41,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:41,204 INFO L87 Difference]: Start difference. First operand 8529 states and 12146 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 02:52:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:43,530 INFO L93 Difference]: Finished difference Result 8535 states and 12151 transitions. [2022-11-03 02:52:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 188 [2022-11-03 02:52:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:43,566 INFO L225 Difference]: With dead ends: 8535 [2022-11-03 02:52:43,566 INFO L226 Difference]: Without dead ends: 8533 [2022-11-03 02:52:43,570 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 02:52:43,571 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1726 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:43,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:52:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2022-11-03 02:52:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 8533. [2022-11-03 02:52:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 4970 states have (on average 1.2758551307847084) internal successors, (6341), 5222 states have internal predecessors, (6341), 2899 states have call successors, (2899), 672 states have call predecessors, (2899), 661 states have return successors, (2909), 2818 states have call predecessors, (2909), 2895 states have call successors, (2909) [2022-11-03 02:52:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 12149 transitions. [2022-11-03 02:52:44,269 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 12149 transitions. Word has length 188 [2022-11-03 02:52:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:44,270 INFO L495 AbstractCegarLoop]: Abstraction has 8533 states and 12149 transitions. [2022-11-03 02:52:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 02:52:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 12149 transitions. [2022-11-03 02:52:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 02:52:44,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:44,279 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] [2022-11-03 02:52:44,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:52:44,279 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 02:52:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1654217899, now seen corresponding path program 1 times [2022-11-03 02:52:44,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:44,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264752063] [2022-11-03 02:52:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:44,699 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 02:52:44,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264752063] [2022-11-03 02:52:44,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264752063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:44,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:44,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109049799] [2022-11-03 02:52:44,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:44,702 INFO L87 Difference]: Start difference. First operand 8533 states and 12149 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 02:52:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:46,976 INFO L93 Difference]: Finished difference Result 8577 states and 12175 transitions. [2022-11-03 02:52:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:46,977 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 196 [2022-11-03 02:52:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:47,012 INFO L225 Difference]: With dead ends: 8577 [2022-11-03 02:52:47,012 INFO L226 Difference]: Without dead ends: 8575 [2022-11-03 02:52:47,019 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 02:52:47,020 INFO L413 NwaCegarLoop]: 1525 mSDtfsCounter, 1701 mSDsluCounter, 3580 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 4578 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:47,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1705 Valid, 4578 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:52:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2022-11-03 02:52:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8573. [2022-11-03 02:52:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8573 states, 4993 states have (on average 1.2745844181854595) internal successors, (6364), 5245 states have internal predecessors, (6364), 2899 states have call successors, (2899), 689 states have call predecessors, (2899), 678 states have return successors, (2909), 2818 states have call predecessors, (2909), 2895 states have call successors, (2909) [2022-11-03 02:52:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 12172 transitions. [2022-11-03 02:52:47,906 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 12172 transitions. Word has length 196 [2022-11-03 02:52:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:47,906 INFO L495 AbstractCegarLoop]: Abstraction has 8573 states and 12172 transitions. [2022-11-03 02:52:47,907 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 02:52:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 12172 transitions. [2022-11-03 02:52:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-03 02:52:47,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:47,916 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 9, 9, 9, 9, 9, 9, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:47,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:52:47,916 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 02:52:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1098565298, now seen corresponding path program 1 times [2022-11-03 02:52:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696593282] [2022-11-03 02:52:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-11-03 02:52:48,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696593282] [2022-11-03 02:52:48,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696593282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:48,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:48,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842785723] [2022-11-03 02:52:48,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:48,328 INFO L87 Difference]: Start difference. First operand 8573 states and 12172 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:52:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:50,708 INFO L93 Difference]: Finished difference Result 8579 states and 12177 transitions. [2022-11-03 02:52:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 198 [2022-11-03 02:52:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:50,736 INFO L225 Difference]: With dead ends: 8579 [2022-11-03 02:52:50,736 INFO L226 Difference]: Without dead ends: 8577 [2022-11-03 02:52:50,741 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 02:52:50,742 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1726 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:50,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1729 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:52:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8577 states. [2022-11-03 02:52:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8577 to 8577. [2022-11-03 02:52:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8577 states, 4996 states have (on average 1.2744195356285029) internal successors, (6367), 5248 states have internal predecessors, (6367), 2899 states have call successors, (2899), 690 states have call predecessors, (2899), 679 states have return successors, (2909), 2818 states have call predecessors, (2909), 2895 states have call successors, (2909) [2022-11-03 02:52:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8577 states to 8577 states and 12175 transitions. [2022-11-03 02:52:51,537 INFO L78 Accepts]: Start accepts. Automaton has 8577 states and 12175 transitions. Word has length 198 [2022-11-03 02:52:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:51,538 INFO L495 AbstractCegarLoop]: Abstraction has 8577 states and 12175 transitions. [2022-11-03 02:52:51,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:52:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8577 states and 12175 transitions. [2022-11-03 02:52:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 02:52:51,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:51,549 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 10, 10, 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 02:52:51,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:52:51,549 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 02:52:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 459338887, now seen corresponding path program 1 times [2022-11-03 02:52:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097188794] [2022-11-03 02:52:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-11-03 02:52:51,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:51,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097188794] [2022-11-03 02:52:51,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097188794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:51,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:51,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:52:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099351786] [2022-11-03 02:52:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:52:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:52:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:51,981 INFO L87 Difference]: Start difference. First operand 8577 states and 12175 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, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:52:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:54,812 INFO L93 Difference]: Finished difference Result 8583 states and 12180 transitions. [2022-11-03 02:52:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:52:54,812 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, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 207 [2022-11-03 02:52:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:54,855 INFO L225 Difference]: With dead ends: 8583 [2022-11-03 02:52:54,856 INFO L226 Difference]: Without dead ends: 8581 [2022-11-03 02:52:54,864 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 02:52:54,865 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1725 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:54,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:52:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2022-11-03 02:52:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 8581. [2022-11-03 02:52:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 4999 states have (on average 1.274254850970194) internal successors, (6370), 5251 states have internal predecessors, (6370), 2899 states have call successors, (2899), 691 states have call predecessors, (2899), 680 states have return successors, (2909), 2818 states have call predecessors, (2909), 2895 states have call successors, (2909) [2022-11-03 02:52:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 12178 transitions. [2022-11-03 02:52:55,747 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 12178 transitions. Word has length 207 [2022-11-03 02:52:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:55,747 INFO L495 AbstractCegarLoop]: Abstraction has 8581 states and 12178 transitions. [2022-11-03 02:52:55,747 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, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:52:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 12178 transitions. [2022-11-03 02:52:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-03 02:52:55,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:55,762 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 9, 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] [2022-11-03 02:52:55,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:52:55,763 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 02:52:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1212680283, now seen corresponding path program 1 times [2022-11-03 02:52:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240271123] [2022-11-03 02:52:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2022-11-03 02:52:56,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:56,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240271123] [2022-11-03 02:52:56,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240271123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:56,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:56,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512937034] [2022-11-03 02:52:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:56,219 INFO L87 Difference]: Start difference. First operand 8581 states and 12178 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 02:52:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:58,588 INFO L93 Difference]: Finished difference Result 15170 states and 21428 transitions. [2022-11-03 02:52:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 204 [2022-11-03 02:52:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:58,613 INFO L225 Difference]: With dead ends: 15170 [2022-11-03 02:52:58,614 INFO L226 Difference]: Without dead ends: 6608 [2022-11-03 02:52:58,656 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 02:52:58,656 INFO L413 NwaCegarLoop]: 2177 mSDtfsCounter, 1033 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 3661 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:58,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 3661 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:52:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2022-11-03 02:52:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6532. [2022-11-03 02:52:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 3868 states have (on average 1.2719751809720785) internal successors, (4920), 4058 states have internal predecessors, (4920), 2103 states have call successors, (2103), 568 states have call predecessors, (2103), 558 states have return successors, (2106), 2034 states have call predecessors, (2106), 2099 states have call successors, (2106) [2022-11-03 02:52:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9129 transitions. [2022-11-03 02:52:59,563 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9129 transitions. Word has length 204 [2022-11-03 02:52:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:59,564 INFO L495 AbstractCegarLoop]: Abstraction has 6532 states and 9129 transitions. [2022-11-03 02:52:59,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 02:52:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9129 transitions. [2022-11-03 02:52:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-03 02:52:59,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:59,572 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 11, 9, 9, 9, 9, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:52:59,572 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 02:52:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1513736274, now seen corresponding path program 1 times [2022-11-03 02:52:59,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703594585] [2022-11-03 02:52:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:59,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2022-11-03 02:53:00,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703594585] [2022-11-03 02:53:00,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703594585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:00,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:00,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359065445] [2022-11-03 02:53:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:00,143 INFO L87 Difference]: Start difference. First operand 6532 states and 9129 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 02:53:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:03,334 INFO L93 Difference]: Finished difference Result 6538 states and 9134 transitions. [2022-11-03 02:53:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 208 [2022-11-03 02:53:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:03,358 INFO L225 Difference]: With dead ends: 6538 [2022-11-03 02:53:03,358 INFO L226 Difference]: Without dead ends: 6534 [2022-11-03 02:53:03,361 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 02:53:03,361 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1726 mSDsluCounter, 3538 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 4540 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:03,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 4540 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:53:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-11-03 02:53:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 6534. [2022-11-03 02:53:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6534 states, 3870 states have (on average 1.271576227390181) internal successors, (4921), 4059 states have internal predecessors, (4921), 2103 states have call successors, (2103), 569 states have call predecessors, (2103), 558 states have return successors, (2106), 2034 states have call predecessors, (2106), 2099 states have call successors, (2106) [2022-11-03 02:53:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6534 states to 6534 states and 9130 transitions. [2022-11-03 02:53:04,250 INFO L78 Accepts]: Start accepts. Automaton has 6534 states and 9130 transitions. Word has length 208 [2022-11-03 02:53:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:04,250 INFO L495 AbstractCegarLoop]: Abstraction has 6534 states and 9130 transitions. [2022-11-03 02:53:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (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 02:53:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6534 states and 9130 transitions. [2022-11-03 02:53:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-03 02:53:04,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:04,257 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 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 02:53:04,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:53:04,257 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:04,258 INFO L85 PathProgramCache]: Analyzing trace with hash 865654695, now seen corresponding path program 1 times [2022-11-03 02:53:04,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423004820] [2022-11-03 02:53:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:04,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-11-03 02:53:04,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423004820] [2022-11-03 02:53:04,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423004820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:04,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:04,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:04,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551110478] [2022-11-03 02:53:04,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:04,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:04,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:04,860 INFO L87 Difference]: Start difference. First operand 6534 states and 9130 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, (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 02:53:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:07,277 INFO L93 Difference]: Finished difference Result 6534 states and 9130 transitions. [2022-11-03 02:53:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:07,280 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, (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 217 [2022-11-03 02:53:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:07,300 INFO L225 Difference]: With dead ends: 6534 [2022-11-03 02:53:07,302 INFO L226 Difference]: Without dead ends: 6402 [2022-11-03 02:53:07,306 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 02:53:07,307 INFO L413 NwaCegarLoop]: 1518 mSDtfsCounter, 1721 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:07,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1721 Valid, 4537 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:53:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2022-11-03 02:53:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 6402. [2022-11-03 02:53:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6402 states, 3819 states have (on average 1.26891856506939) internal successors, (4846), 3984 states have internal predecessors, (4846), 2039 states have call successors, (2039), 547 states have call predecessors, (2039), 542 states have return successors, (2046), 1999 states have call predecessors, (2046), 2039 states have call successors, (2046) [2022-11-03 02:53:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6402 states to 6402 states and 8931 transitions. [2022-11-03 02:53:07,780 INFO L78 Accepts]: Start accepts. Automaton has 6402 states and 8931 transitions. Word has length 217 [2022-11-03 02:53:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:07,781 INFO L495 AbstractCegarLoop]: Abstraction has 6402 states and 8931 transitions. [2022-11-03 02:53:07,781 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, (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 02:53:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6402 states and 8931 transitions. [2022-11-03 02:53:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-03 02:53:07,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:07,788 INFO L195 NwaCegarLoop]: trace histogram [15, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:53:07,789 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 02:53:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -450988051, now seen corresponding path program 1 times [2022-11-03 02:53:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:07,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610268395] [2022-11-03 02:53:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-11-03 02:53:08,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610268395] [2022-11-03 02:53:08,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610268395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:08,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:08,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213724875] [2022-11-03 02:53:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:08,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:08,078 INFO L87 Difference]: Start difference. First operand 6402 states and 8931 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2022-11-03 02:53:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:10,588 INFO L93 Difference]: Finished difference Result 14646 states and 20414 transitions. [2022-11-03 02:53:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:10,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 251 [2022-11-03 02:53:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:10,621 INFO L225 Difference]: With dead ends: 14646 [2022-11-03 02:53:10,621 INFO L226 Difference]: Without dead ends: 8384 [2022-11-03 02:53:10,636 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 02:53:10,637 INFO L413 NwaCegarLoop]: 2274 mSDtfsCounter, 992 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:10,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 3706 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:53:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2022-11-03 02:53:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 8376. [2022-11-03 02:53:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8376 states, 5028 states have (on average 1.2675019888623706) internal successors, (6373), 5237 states have internal predecessors, (6373), 2609 states have call successors, (2609), 742 states have call predecessors, (2609), 737 states have return successors, (2616), 2563 states have call predecessors, (2616), 2609 states have call successors, (2616) [2022-11-03 02:53:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8376 states to 8376 states and 11598 transitions. [2022-11-03 02:53:11,298 INFO L78 Accepts]: Start accepts. Automaton has 8376 states and 11598 transitions. Word has length 251 [2022-11-03 02:53:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:11,299 INFO L495 AbstractCegarLoop]: Abstraction has 8376 states and 11598 transitions. [2022-11-03 02:53:11,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2022-11-03 02:53:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8376 states and 11598 transitions. [2022-11-03 02:53:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-03 02:53:11,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:11,307 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:11,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:53:11,308 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1482818783, now seen corresponding path program 1 times [2022-11-03 02:53:11,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355209684] [2022-11-03 02:53:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2022-11-03 02:53:12,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355209684] [2022-11-03 02:53:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355209684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:12,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:12,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816189587] [2022-11-03 02:53:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:12,203 INFO L87 Difference]: Start difference. First operand 8376 states and 11598 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 02:53:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:14,574 INFO L93 Difference]: Finished difference Result 8392 states and 11612 transitions. [2022-11-03 02:53:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 313 [2022-11-03 02:53:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:14,612 INFO L225 Difference]: With dead ends: 8392 [2022-11-03 02:53:14,612 INFO L226 Difference]: Without dead ends: 8390 [2022-11-03 02:53:14,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 02:53:14,618 INFO L413 NwaCegarLoop]: 1474 mSDtfsCounter, 1616 mSDsluCounter, 3491 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 4442 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:14,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 4442 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:53:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8390 states. [2022-11-03 02:53:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8390 to 8388. [2022-11-03 02:53:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8388 states, 5037 states have (on average 1.266428429620806) internal successors, (6379), 5246 states have internal predecessors, (6379), 2609 states have call successors, (2609), 745 states have call predecessors, (2609), 740 states have return successors, (2616), 2563 states have call predecessors, (2616), 2609 states have call successors, (2616) [2022-11-03 02:53:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8388 states to 8388 states and 11604 transitions. [2022-11-03 02:53:15,449 INFO L78 Accepts]: Start accepts. Automaton has 8388 states and 11604 transitions. Word has length 313 [2022-11-03 02:53:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:15,450 INFO L495 AbstractCegarLoop]: Abstraction has 8388 states and 11604 transitions. [2022-11-03 02:53:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 02:53:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8388 states and 11604 transitions. [2022-11-03 02:53:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-03 02:53:15,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:15,460 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, 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 02:53:15,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:53:15,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1080575433, now seen corresponding path program 1 times [2022-11-03 02:53:15,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:15,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696954799] [2022-11-03 02:53:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-03 02:53:16,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:16,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696954799] [2022-11-03 02:53:16,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696954799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:16,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:16,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:53:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951478220] [2022-11-03 02:53:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:16,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:53:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:53:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:16,309 INFO L87 Difference]: Start difference. First operand 8388 states and 11604 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-03 02:53:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:18,936 INFO L93 Difference]: Finished difference Result 8390 states and 11605 transitions. [2022-11-03 02:53:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:53:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 334 [2022-11-03 02:53:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:18,966 INFO L225 Difference]: With dead ends: 8390 [2022-11-03 02:53:18,967 INFO L226 Difference]: Without dead ends: 8388 [2022-11-03 02:53:18,972 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 02:53:18,973 INFO L413 NwaCegarLoop]: 1470 mSDtfsCounter, 26 mSDsluCounter, 5163 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5862 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:18,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 5862 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:53:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-11-03 02:53:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 8388. [2022-11-03 02:53:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8388 states, 5037 states have (on average 1.265237244391503) internal successors, (6373), 5246 states have internal predecessors, (6373), 2609 states have call successors, (2609), 745 states have call predecessors, (2609), 740 states have return successors, (2616), 2563 states have call predecessors, (2616), 2609 states have call successors, (2616) [2022-11-03 02:53:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8388 states to 8388 states and 11598 transitions. [2022-11-03 02:53:19,679 INFO L78 Accepts]: Start accepts. Automaton has 8388 states and 11598 transitions. Word has length 334 [2022-11-03 02:53:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:19,680 INFO L495 AbstractCegarLoop]: Abstraction has 8388 states and 11598 transitions. [2022-11-03 02:53:19,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2022-11-03 02:53:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8388 states and 11598 transitions. [2022-11-03 02:53:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-03 02:53:19,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:19,697 INFO L195 NwaCegarLoop]: trace histogram [23, 17, 17, 11, 11, 11, 11, 11, 11, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:53:19,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 364287246, now seen corresponding path program 1 times [2022-11-03 02:53:19,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680205573] [2022-11-03 02:53:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2022-11-03 02:53:20,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680205573] [2022-11-03 02:53:20,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680205573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:20,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:20,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149264585] [2022-11-03 02:53:20,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:20,353 INFO L87 Difference]: Start difference. First operand 8388 states and 11598 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2022-11-03 02:53:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:22,617 INFO L93 Difference]: Finished difference Result 16648 states and 23035 transitions. [2022-11-03 02:53:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 474 [2022-11-03 02:53:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:22,650 INFO L225 Difference]: With dead ends: 16648 [2022-11-03 02:53:22,651 INFO L226 Difference]: Without dead ends: 8400 [2022-11-03 02:53:22,678 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 02:53:22,679 INFO L413 NwaCegarLoop]: 1471 mSDtfsCounter, 1 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:22,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2933 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:53:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2022-11-03 02:53:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 8392. [2022-11-03 02:53:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 5041 states have (on average 1.265026780400714) internal successors, (6377), 5250 states have internal predecessors, (6377), 2609 states have call successors, (2609), 745 states have call predecessors, (2609), 740 states have return successors, (2616), 2563 states have call predecessors, (2616), 2609 states have call successors, (2616) [2022-11-03 02:53:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 11602 transitions. [2022-11-03 02:53:23,455 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 11602 transitions. Word has length 474 [2022-11-03 02:53:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:23,456 INFO L495 AbstractCegarLoop]: Abstraction has 8392 states and 11602 transitions. [2022-11-03 02:53:23,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2022-11-03 02:53:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 11602 transitions. [2022-11-03 02:53:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-03 02:53:23,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:23,479 INFO L195 NwaCegarLoop]: trace histogram [23, 17, 17, 11, 11, 11, 11, 11, 11, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:53:23,480 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 02:53:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1726440598, now seen corresponding path program 1 times [2022-11-03 02:53:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:23,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614906878] [2022-11-03 02:53:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2022-11-03 02:53:24,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614906878] [2022-11-03 02:53:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614906878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838507794] [2022-11-03 02:53:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:24,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:24,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:53:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 4849 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:53:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2022-11-03 02:53:26,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:26,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838507794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:26,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:26,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:53:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771867161] [2022-11-03 02:53:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:26,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:26,225 INFO L87 Difference]: Start difference. First operand 8392 states and 11602 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2022-11-03 02:53:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:28,966 INFO L93 Difference]: Finished difference Result 16760 states and 23215 transitions. [2022-11-03 02:53:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) Word has length 479 [2022-11-03 02:53:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:29,001 INFO L225 Difference]: With dead ends: 16760 [2022-11-03 02:53:29,001 INFO L226 Difference]: Without dead ends: 8508 [2022-11-03 02:53:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:29,026 INFO L413 NwaCegarLoop]: 1485 mSDtfsCounter, 17 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:29,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2940 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:53:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8508 states. [2022-11-03 02:53:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8508 to 8400. [2022-11-03 02:53:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8400 states, 5049 states have (on average 1.264606852842147) internal successors, (6385), 5258 states have internal predecessors, (6385), 2609 states have call successors, (2609), 745 states have call predecessors, (2609), 740 states have return successors, (2616), 2563 states have call predecessors, (2616), 2609 states have call successors, (2616) [2022-11-03 02:53:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8400 states to 8400 states and 11610 transitions. [2022-11-03 02:53:29,761 INFO L78 Accepts]: Start accepts. Automaton has 8400 states and 11610 transitions. Word has length 479 [2022-11-03 02:53:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:29,762 INFO L495 AbstractCegarLoop]: Abstraction has 8400 states and 11610 transitions. [2022-11-03 02:53:29,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2022-11-03 02:53:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8400 states and 11610 transitions. [2022-11-03 02:53:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-11-03 02:53:29,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:29,779 INFO L195 NwaCegarLoop]: trace histogram [23, 17, 17, 11, 11, 11, 11, 11, 11, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:29,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:53:29,980 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1596818011, now seen corresponding path program 1 times [2022-11-03 02:53:29,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:29,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335702681] [2022-11-03 02:53:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1344 trivial. 0 not checked. [2022-11-03 02:53:30,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:30,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335702681] [2022-11-03 02:53:30,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335702681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:30,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269833776] [2022-11-03 02:53:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:30,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:30,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:30,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:30,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:53:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 4880 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:53:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2022-11-03 02:53:32,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269833776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:32,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:53:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132908656] [2022-11-03 02:53:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:32,844 INFO L87 Difference]: Start difference. First operand 8400 states and 11610 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2022-11-03 02:53:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:35,852 INFO L93 Difference]: Finished difference Result 20044 states and 27775 transitions. [2022-11-03 02:53:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) Word has length 484 [2022-11-03 02:53:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:35,910 INFO L225 Difference]: With dead ends: 20044 [2022-11-03 02:53:35,911 INFO L226 Difference]: Without dead ends: 11784 [2022-11-03 02:53:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:35,945 INFO L413 NwaCegarLoop]: 2677 mSDtfsCounter, 1492 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 4068 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:35,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 4068 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:53:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11784 states. [2022-11-03 02:53:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11784 to 11781. [2022-11-03 02:53:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11781 states, 7126 states have (on average 1.2587706988492844) internal successors, (8970), 7412 states have internal predecessors, (8970), 3630 states have call successors, (3630), 1031 states have call predecessors, (3630), 1023 states have return successors, (3641), 3561 states have call predecessors, (3641), 3630 states have call successors, (3641) [2022-11-03 02:53:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11781 states to 11781 states and 16241 transitions. [2022-11-03 02:53:37,109 INFO L78 Accepts]: Start accepts. Automaton has 11781 states and 16241 transitions. Word has length 484 [2022-11-03 02:53:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 11781 states and 16241 transitions. [2022-11-03 02:53:37,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (74), 3 states have call predecessors, (74), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2022-11-03 02:53:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 11781 states and 16241 transitions. [2022-11-03 02:53:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-03 02:53:37,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:37,128 INFO L195 NwaCegarLoop]: trace histogram [25, 17, 17, 11, 11, 11, 11, 11, 11, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:37,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:53:37,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:37,344 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:53:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash -201518163, now seen corresponding path program 1 times [2022-11-03 02:53:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665956539] [2022-11-03 02:53:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:37,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2022-11-03 02:53:38,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665956539] [2022-11-03 02:53:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665956539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485453529] [2022-11-03 02:53:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:38,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:38,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:53:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 4941 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:53:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2022-11-03 02:53:39,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485453529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-03 02:53:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892794068] [2022-11-03 02:53:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:39,885 INFO L87 Difference]: Start difference. First operand 11781 states and 16241 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2022-11-03 02:53:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:42,968 INFO L93 Difference]: Finished difference Result 27480 states and 37849 transitions. [2022-11-03 02:53:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) Word has length 504 [2022-11-03 02:53:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:43,037 INFO L225 Difference]: With dead ends: 27480 [2022-11-03 02:53:43,038 INFO L226 Difference]: Without dead ends: 15839 [2022-11-03 02:53:43,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:53:43,082 INFO L413 NwaCegarLoop]: 1809 mSDtfsCounter, 1640 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:43,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 3096 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:53:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15839 states. [2022-11-03 02:53:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15839 to 15836. [2022-11-03 02:53:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15836 states, 9631 states have (on average 1.25957844460596) internal successors, (12131), 10010 states have internal predecessors, (12131), 4811 states have call successors, (4811), 1403 states have call predecessors, (4811), 1392 states have return successors, (4826), 4717 states have call predecessors, (4826), 4811 states have call successors, (4826) [2022-11-03 02:53:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15836 states to 15836 states and 21768 transitions. [2022-11-03 02:53:44,589 INFO L78 Accepts]: Start accepts. Automaton has 15836 states and 21768 transitions. Word has length 504 [2022-11-03 02:53:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 15836 states and 21768 transitions. [2022-11-03 02:53:44,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2022-11-03 02:53:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 15836 states and 21768 transitions. [2022-11-03 02:53:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-11-03 02:53:44,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:44,608 INFO L195 NwaCegarLoop]: trace histogram [25, 17, 17, 11, 11, 11, 11, 11, 11, 6, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:53:44,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 02:53:44,809 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 02:53:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 216204391, now seen corresponding path program 1 times [2022-11-03 02:53:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465658661] [2022-11-03 02:53:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1447 trivial. 0 not checked. [2022-11-03 02:53:45,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465658661] [2022-11-03 02:53:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465658661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738997575] [2022-11-03 02:53:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:45,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:45,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d2aeb7b-aefd-4531-94bf-fa81fd10d002/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:53:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 4943 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:53:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 505 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-03 02:53:47,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1475 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1447 trivial. 0 not checked. [2022-11-03 02:53:48,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738997575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268089752] [2022-11-03 02:53:48,355 INFO L159 IcfgInterpreter]: Started Sifa with 264 locations of interest [2022-11-03 02:53:48,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:53:48,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:53:48,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:53:48,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs