./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V --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 5a5abe7d84ebfba3a3d05a8884a5cfb8bfd1e0698553d38fcfc4a2d2724f4159 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:58:32,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:58:32,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:58:33,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:58:33,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:58:33,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:58:33,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:58:33,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:58:33,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:58:33,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:58:33,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:58:33,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:58:33,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:58:33,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:58:33,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:58:33,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:58:33,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:58:33,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:58:33,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:58:33,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:58:33,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:58:33,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:58:33,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:58:33,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:58:33,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:58:33,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:58:33,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:58:33,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:58:33,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:58:33,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:58:33,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:58:33,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:58:33,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:58:33,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:58:33,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:58:33,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:58:33,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:58:33,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:58:33,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:58:33,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:58:33,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:58:33,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:58:33,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:58:33,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:58:33,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:58:33,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:58:33,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:58:33,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:58:33,174 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:58:33,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:58:33,175 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:58:33,175 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:58:33,176 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:58:33,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:58:33,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:58:33,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:58:33,177 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:58:33,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:58:33,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:58:33,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:58:33,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:58:33,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:58:33,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:58:33,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:58:33,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:58:33,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:58:33,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:58:33,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:58:33,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:58:33,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:58:33,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:58:33,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:33,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:58:33,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:58:33,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:58:33,183 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:58:33,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:58:33,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:58:33,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:58:33,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:58:33,185 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a5abe7d84ebfba3a3d05a8884a5cfb8bfd1e0698553d38fcfc4a2d2724f4159 [2021-11-23 02:58:33,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:58:33,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:58:33,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:58:33,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:58:33,483 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:58:33,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i [2021-11-23 02:58:33,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/data/1852bfc77/e8a7dc24c4ef481993f08565067dae6b/FLAGf9ee12135 [2021-11-23 02:58:34,651 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:58:34,653 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i [2021-11-23 02:58:34,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/data/1852bfc77/e8a7dc24c4ef481993f08565067dae6b/FLAGf9ee12135 [2021-11-23 02:58:34,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/data/1852bfc77/e8a7dc24c4ef481993f08565067dae6b [2021-11-23 02:58:34,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:58:34,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:58:34,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:34,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:58:34,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:58:34,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:34" (1/1) ... [2021-11-23 02:58:34,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8aa8beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:34, skipping insertion in model container [2021-11-23 02:58:34,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:34" (1/1) ... [2021-11-23 02:58:34,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:58:35,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:58:39,620 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459471,459484] [2021-11-23 02:58:39,623 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459640,459653] [2021-11-23 02:58:39,624 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459807,459820] [2021-11-23 02:58:39,624 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459975,459988] [2021-11-23 02:58:39,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:39,804 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:58:40,315 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459471,459484] [2021-11-23 02:58:40,316 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459640,459653] [2021-11-23 02:58:40,316 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459807,459820] [2021-11-23 02:58:40,317 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_e588ec97-0224-42e0-b37f-b28ae962ecf2/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i[459975,459988] [2021-11-23 02:58:40,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:40,601 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:58:40,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40 WrapperNode [2021-11-23 02:58:40,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:40,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:40,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:58:40,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:58:40,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:40,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,096 INFO L137 Inliner]: procedures = 522, calls = 3749, calls flagged for inlining = 276, calls inlined = 260, statements flattened = 6740 [2021-11-23 02:58:41,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:41,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:58:41,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:58:41,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:58:41,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:58:41,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:58:41,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:58:41,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:58:41,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (1/1) ... [2021-11-23 02:58:41,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:41,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:41,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:58:41,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e588ec97-0224-42e0-b37f-b28ae962ecf2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:58:41,694 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread8 [2021-11-23 02:58:41,694 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread8 [2021-11-23 02:58:41,694 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_frequency_to_channel [2021-11-23 02:58:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_frequency_to_channel [2021-11-23 02:58:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_tx_ring [2021-11-23 02:58:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_tx_ring [2021-11-23 02:58:41,695 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite8 [2021-11-23 02:58:41,695 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite8 [2021-11-23 02:58:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:58:41,696 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:58:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:58:41,696 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:58:41,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:58:41,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:58:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_init [2021-11-23 02:58:41,697 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_init [2021-11-23 02:58:41,697 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_calc_rssi [2021-11-23 02:58:41,697 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_calc_rssi [2021-11-23 02:58:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:58:41,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:58:41,698 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:58:41,698 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:58:41,699 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:58:41,699 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:58:41,699 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:58:41,700 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:58:41,700 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_write_phy_antenna [2021-11-23 02:58:41,700 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_write_phy_antenna [2021-11-23 02:58:41,700 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_init [2021-11-23 02:58:41,700 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_init [2021-11-23 02:58:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread32 [2021-11-23 02:58:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread32 [2021-11-23 02:58:41,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:58:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:58:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_rx_ring [2021-11-23 02:58:41,702 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_rx_ring [2021-11-23 02:58:41,702 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_bss_info_changed [2021-11-23 02:58:41,702 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_bss_info_changed [2021-11-23 02:58:41,703 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_calc_rssi [2021-11-23 02:58:41,703 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_calc_rssi [2021-11-23 02:58:41,703 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:58:41,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:58:41,704 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:58:41,705 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:58:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_rtl8180_driver_exit_14_2 [2021-11-23 02:58:41,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_rtl8180_driver_exit_14_2 [2021-11-23 02:58:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:58:41,706 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_set_tx_power [2021-11-23 02:58:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_set_tx_power [2021-11-23 02:58:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread16 [2021-11-23 02:58:41,707 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread16 [2021-11-23 02:58:41,707 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_set_anaparam [2021-11-23 02:58:41,708 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_set_anaparam [2021-11-23 02:58:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:58:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_tx_rate [2021-11-23 02:58:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_tx_rate [2021-11-23 02:58:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_conf_erp [2021-11-23 02:58:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_conf_erp [2021-11-23 02:58:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:58:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:58:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:58:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:58:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_stop [2021-11-23 02:58:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_stop [2021-11-23 02:58:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:58:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:58:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:58:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_stop [2021-11-23 02:58:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_stop [2021-11-23 02:58:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:58:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:58:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:58:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_get_tsf [2021-11-23 02:58:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_get_tsf [2021-11-23 02:58:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:58:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:58:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:58:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:58:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:58:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:58:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:58:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:58:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-23 02:58:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-23 02:58:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_add_interface [2021-11-23 02:58:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_add_interface [2021-11-23 02:58:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_write_phy_antenna [2021-11-23 02:58:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_write_phy_antenna [2021-11-23 02:58:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:58:41,720 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:58:41,720 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_channel [2021-11-23 02:58:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_channel [2021-11-23 02:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_tx_power [2021-11-23 02:58:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_tx_power [2021-11-23 02:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_set_channel [2021-11-23 02:58:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_set_channel [2021-11-23 02:58:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:58:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:58:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-23 02:58:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-23 02:58:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:58:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:58:41,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:58:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:58:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:58:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:58:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-23 02:58:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-23 02:58:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_free_hw [2021-11-23 02:58:41,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_free_hw [2021-11-23 02:58:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_cck [2021-11-23 02:58:41,730 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_cck [2021-11-23 02:58:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:58:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:58:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:58:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:58:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:58:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:58:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:58:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:58:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:58:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_rts_cts_rate [2021-11-23 02:58:41,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_rts_cts_rate [2021-11-23 02:58:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_start [2021-11-23 02:58:41,739 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_start [2021-11-23 02:58:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_set_channel [2021-11-23 02:58:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_set_channel [2021-11-23 02:58:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:58:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:58:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_resume [2021-11-23 02:58:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_resume [2021-11-23 02:58:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_ofdm [2021-11-23 02:58:41,741 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_ofdm [2021-11-23 02:58:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_rtl8180_priv [2021-11-23 02:58:41,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_rtl8180_priv [2021-11-23 02:58:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_calc_rssi [2021-11-23 02:58:41,741 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_calc_rssi [2021-11-23 02:58:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_write_phy [2021-11-23 02:58:41,742 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_write_phy [2021-11-23 02:58:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-23 02:58:41,742 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-23 02:58:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:58:41,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:58:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:58:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:58:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure write_sa2400 [2021-11-23 02:58:41,743 INFO L138 BoogieDeclarations]: Found implementation of procedure write_sa2400 [2021-11-23 02:58:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:58:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:58:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:58:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:58:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_stop [2021-11-23 02:58:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_stop [2021-11-23 02:58:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:58:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:58:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ieee80211_free_hw [2021-11-23 02:58:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ieee80211_free_hw [2021-11-23 02:58:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_init [2021-11-23 02:58:41,745 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_init [2021-11-23 02:58:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_init [2021-11-23 02:58:41,746 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_init [2021-11-23 02:58:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove [2021-11-23 02:58:41,746 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove [2021-11-23 02:58:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-23 02:58:41,746 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-23 02:58:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:58:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:58:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:58:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:58:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_stop [2021-11-23 02:58:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_stop [2021-11-23 02:58:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:58:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:58:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:58:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:58:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write [2021-11-23 02:58:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write [2021-11-23 02:58:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:58:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_write_phy_antenna [2021-11-23 02:58:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_write_phy_antenna [2021-11-23 02:58:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:58:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:58:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-23 02:58:41,750 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-23 02:58:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:58:41,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:58:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write_max2820 [2021-11-23 02:58:41,751 INFO L138 BoogieDeclarations]: Found implementation of procedure write_max2820 [2021-11-23 02:58:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure write_grf5101 [2021-11-23 02:58:41,751 INFO L138 BoogieDeclarations]: Found implementation of procedure write_grf5101 [2021-11-23 02:58:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove_interface [2021-11-23 02:58:41,751 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove_interface [2021-11-23 02:58:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_61 [2021-11-23 02:58:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_61 [2021-11-23 02:58:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-23 02:58:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-23 02:58:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_read [2021-11-23 02:58:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_read [2021-11-23 02:58:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_set_channel [2021-11-23 02:58:41,753 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_set_channel [2021-11-23 02:58:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:58:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_read [2021-11-23 02:58:41,753 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_read [2021-11-23 02:58:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-23 02:58:41,754 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-23 02:58:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:58:41,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:58:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_handle_tx [2021-11-23 02:58:41,754 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_handle_tx [2021-11-23 02:58:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_configure_filter [2021-11-23 02:58:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_configure_filter [2021-11-23 02:58:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_rtl8180_priv [2021-11-23 02:58:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_rtl8180_priv [2021-11-23 02:58:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-23 02:58:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-23 02:58:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-23 02:58:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-23 02:58:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:58:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:58:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_prepare_multicast [2021-11-23 02:58:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_prepare_multicast [2021-11-23 02:58:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-23 02:58:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-23 02:58:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite32 [2021-11-23 02:58:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite32 [2021-11-23 02:58:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_multiread [2021-11-23 02:58:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_multiread [2021-11-23 02:58:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-23 02:58:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:58:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 02:58:41,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 02:58:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_config [2021-11-23 02:58:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_config [2021-11-23 02:58:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:58:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:58:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_tx [2021-11-23 02:58:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_tx [2021-11-23 02:58:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite16 [2021-11-23 02:58:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite16 [2021-11-23 02:58:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2021-11-23 02:58:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2021-11-23 02:58:43,009 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:58:43,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:58:43,288 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:58:53,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:58:54,149 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:58:56,006 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:58:56,007 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:58:56,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:56 BoogieIcfgContainer [2021-11-23 02:58:56,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:58:56,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:58:56,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:58:56,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:58:56,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:34" (1/3) ... [2021-11-23 02:58:56,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c6c601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:56, skipping insertion in model container [2021-11-23 02:58:56,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:40" (2/3) ... [2021-11-23 02:58:56,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c6c601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:56, skipping insertion in model container [2021-11-23 02:58:56,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:56" (3/3) ... [2021-11-23 02:58:56,025 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wireless-rtl818x-rtl8180-rtl8180.cil.i [2021-11-23 02:58:56,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:58:56,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:58:56,107 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:58:56,115 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:58:56,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:58:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 2498 states, 1174 states have (on average 1.2589437819420783) internal successors, (1478), 1212 states have internal predecessors, (1478), 1209 states have call successors, (1209), 113 states have call predecessors, (1209), 112 states have return successors, (1201), 1184 states have call predecessors, (1201), 1201 states have call successors, (1201) [2021-11-23 02:58:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-23 02:58:56,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:56,259 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:56,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:58:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash 298194244, now seen corresponding path program 1 times [2021-11-23 02:58:56,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:56,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79063086] [2021-11-23 02:58:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:56,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2021-11-23 02:58:57,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:57,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79063086] [2021-11-23 02:58:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79063086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:57,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:57,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:58:57,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429251981] [2021-11-23 02:58:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:57,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:58:57,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:58:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:58:57,466 INFO L87 Difference]: Start difference. First operand has 2498 states, 1174 states have (on average 1.2589437819420783) internal successors, (1478), 1212 states have internal predecessors, (1478), 1209 states have call successors, (1209), 113 states have call predecessors, (1209), 112 states have return successors, (1201), 1184 states have call predecessors, (1201), 1201 states have call successors, (1201) Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:58:59,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:03,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:04,708 INFO L93 Difference]: Finished difference Result 7260 states and 11399 transitions. [2021-11-23 02:59:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:59:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 381 [2021-11-23 02:59:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:04,787 INFO L225 Difference]: With dead ends: 7260 [2021-11-23 02:59:04,787 INFO L226 Difference]: Without dead ends: 4821 [2021-11-23 02:59:04,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:59:04,824 INFO L933 BasicCegarLoop]: 4667 mSDtfsCounter, 3667 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3676 SdHoareTripleChecker+Valid, 8168 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:04,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3676 Valid, 8168 Invalid, 717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 708 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:59:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2021-11-23 02:59:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 4815. [2021-11-23 02:59:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 2265 states have (on average 1.2565121412803533) internal successors, (2846), 2337 states have internal predecessors, (2846), 2327 states have call successors, (2327), 221 states have call predecessors, (2327), 220 states have return successors, (2332), 2288 states have call predecessors, (2332), 2323 states have call successors, (2332) [2021-11-23 02:59:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 7505 transitions. [2021-11-23 02:59:05,672 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 7505 transitions. Word has length 381 [2021-11-23 02:59:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:05,675 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 7505 transitions. [2021-11-23 02:59:05,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:59:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 7505 transitions. [2021-11-23 02:59:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-23 02:59:05,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:05,688 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:05,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:59:05,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:59:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1635874778, now seen corresponding path program 1 times [2021-11-23 02:59:05,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:05,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464343325] [2021-11-23 02:59:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:05,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2021-11-23 02:59:06,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:06,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464343325] [2021-11-23 02:59:06,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464343325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:06,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:06,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:59:06,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527469352] [2021-11-23 02:59:06,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:06,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:59:06,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:59:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:59:06,113 INFO L87 Difference]: Start difference. First operand 4815 states and 7505 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:59:08,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:11,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:13,185 INFO L93 Difference]: Finished difference Result 14067 states and 22008 transitions. [2021-11-23 02:59:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:59:13,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 383 [2021-11-23 02:59:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:13,322 INFO L225 Difference]: With dead ends: 14067 [2021-11-23 02:59:13,322 INFO L226 Difference]: Without dead ends: 9325 [2021-11-23 02:59:13,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:59:13,379 INFO L933 BasicCegarLoop]: 4675 mSDtfsCounter, 3577 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3586 SdHoareTripleChecker+Valid, 8179 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:13,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3586 Valid, 8179 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 698 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-23 02:59:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9325 states. [2021-11-23 02:59:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9325 to 9296. [2021-11-23 02:59:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9296 states, 4346 states have (on average 1.257017947537966) internal successors, (5463), 4485 states have internal predecessors, (5463), 4518 states have call successors, (4518), 432 states have call predecessors, (4518), 429 states have return successors, (4587), 4434 states have call predecessors, (4587), 4514 states have call successors, (4587) [2021-11-23 02:59:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9296 states to 9296 states and 14568 transitions. [2021-11-23 02:59:14,497 INFO L78 Accepts]: Start accepts. Automaton has 9296 states and 14568 transitions. Word has length 383 [2021-11-23 02:59:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:14,503 INFO L470 AbstractCegarLoop]: Abstraction has 9296 states and 14568 transitions. [2021-11-23 02:59:14,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-23 02:59:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 9296 states and 14568 transitions. [2021-11-23 02:59:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-23 02:59:14,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:14,525 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:14,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:59:14,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:59:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash -509427797, now seen corresponding path program 1 times [2021-11-23 02:59:14,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:14,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54656864] [2021-11-23 02:59:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:14,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5367 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5367 trivial. 0 not checked. [2021-11-23 02:59:15,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:15,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54656864] [2021-11-23 02:59:15,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54656864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:15,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:15,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:59:15,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492809111] [2021-11-23 02:59:15,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:15,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:59:15,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:59:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:15,229 INFO L87 Difference]: Start difference. First operand 9296 states and 14568 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 02:59:17,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:18,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:22,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:23,819 INFO L93 Difference]: Finished difference Result 9321 states and 14593 transitions. [2021-11-23 02:59:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:59:23,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 423 [2021-11-23 02:59:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:23,966 INFO L225 Difference]: With dead ends: 9321 [2021-11-23 02:59:23,966 INFO L226 Difference]: Without dead ends: 9319 [2021-11-23 02:59:23,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:59:23,978 INFO L933 BasicCegarLoop]: 3519 mSDtfsCounter, 3748 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3764 SdHoareTripleChecker+Valid, 10562 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:23,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3764 Valid, 10562 Invalid, 1065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1063 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-23 02:59:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9319 states. [2021-11-23 02:59:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9319 to 9317. [2021-11-23 02:59:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9317 states, 4358 states have (on average 1.2565396971087655) internal successors, (5476), 4498 states have internal predecessors, (5476), 4520 states have call successors, (4520), 438 states have call predecessors, (4520), 436 states have return successors, (4594), 4436 states have call predecessors, (4594), 4516 states have call successors, (4594) [2021-11-23 02:59:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9317 states to 9317 states and 14590 transitions. [2021-11-23 02:59:25,167 INFO L78 Accepts]: Start accepts. Automaton has 9317 states and 14590 transitions. Word has length 423 [2021-11-23 02:59:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:25,169 INFO L470 AbstractCegarLoop]: Abstraction has 9317 states and 14590 transitions. [2021-11-23 02:59:25,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (47), 3 states have call predecessors, (47), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-23 02:59:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9317 states and 14590 transitions. [2021-11-23 02:59:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-11-23 02:59:25,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:25,193 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:25,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:59:25,193 INFO L402 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)] === [2021-11-23 02:59:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1846096521, now seen corresponding path program 1 times [2021-11-23 02:59:25,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:25,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169127909] [2021-11-23 02:59:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:25,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5375 trivial. 0 not checked. [2021-11-23 02:59:25,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169127909] [2021-11-23 02:59:25,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169127909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:25,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:25,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:59:25,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433023085] [2021-11-23 02:59:25,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:59:25,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:59:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:25,831 INFO L87 Difference]: Start difference. First operand 9317 states and 14590 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:59:28,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:30,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:34,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:35,091 INFO L93 Difference]: Finished difference Result 9325 states and 14596 transitions. [2021-11-23 02:59:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:59:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 432 [2021-11-23 02:59:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:35,163 INFO L225 Difference]: With dead ends: 9325 [2021-11-23 02:59:35,163 INFO L226 Difference]: Without dead ends: 9323 [2021-11-23 02:59:35,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:59:35,173 INFO L933 BasicCegarLoop]: 3522 mSDtfsCounter, 3742 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 10565 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:35,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3757 Valid, 10565 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1061 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 02:59:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2021-11-23 02:59:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 9321. [2021-11-23 02:59:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9321 states, 4361 states have (on average 1.2563632194450813) internal successors, (5479), 4501 states have internal predecessors, (5479), 4520 states have call successors, (4520), 439 states have call predecessors, (4520), 437 states have return successors, (4594), 4436 states have call predecessors, (4594), 4516 states have call successors, (4594) [2021-11-23 02:59:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9321 states to 9321 states and 14593 transitions. [2021-11-23 02:59:36,137 INFO L78 Accepts]: Start accepts. Automaton has 9321 states and 14593 transitions. Word has length 432 [2021-11-23 02:59:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:36,139 INFO L470 AbstractCegarLoop]: Abstraction has 9321 states and 14593 transitions. [2021-11-23 02:59:36,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 02:59:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 9321 states and 14593 transitions. [2021-11-23 02:59:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-11-23 02:59:36,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:36,160 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:36,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:59:36,161 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:59:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1060634800, now seen corresponding path program 1 times [2021-11-23 02:59:36,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:36,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931776826] [2021-11-23 02:59:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5378 trivial. 0 not checked. [2021-11-23 02:59:36,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931776826] [2021-11-23 02:59:36,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931776826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:36,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:36,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:59:36,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861298922] [2021-11-23 02:59:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:59:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:59:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:36,680 INFO L87 Difference]: Start difference. First operand 9321 states and 14593 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 02:59:38,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:40,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:44,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:45,248 INFO L93 Difference]: Finished difference Result 9329 states and 14599 transitions. [2021-11-23 02:59:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:59:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 436 [2021-11-23 02:59:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:45,319 INFO L225 Difference]: With dead ends: 9329 [2021-11-23 02:59:45,319 INFO L226 Difference]: Without dead ends: 9327 [2021-11-23 02:59:45,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:59:45,331 INFO L933 BasicCegarLoop]: 3522 mSDtfsCounter, 3742 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 10565 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:45,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3756 Valid, 10565 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2021-11-23 02:59:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-11-23 02:59:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 9325. [2021-11-23 02:59:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9325 states, 4364 states have (on average 1.2561869844179652) internal successors, (5482), 4504 states have internal predecessors, (5482), 4520 states have call successors, (4520), 440 states have call predecessors, (4520), 438 states have return successors, (4594), 4436 states have call predecessors, (4594), 4516 states have call successors, (4594) [2021-11-23 02:59:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9325 states to 9325 states and 14596 transitions. [2021-11-23 02:59:46,369 INFO L78 Accepts]: Start accepts. Automaton has 9325 states and 14596 transitions. Word has length 436 [2021-11-23 02:59:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:46,370 INFO L470 AbstractCegarLoop]: Abstraction has 9325 states and 14596 transitions. [2021-11-23 02:59:46,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 02:59:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9325 states and 14596 transitions. [2021-11-23 02:59:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-23 02:59:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:46,393 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:46,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:59:46,393 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:59:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1745599049, now seen corresponding path program 1 times [2021-11-23 02:59:46,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:46,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326632015] [2021-11-23 02:59:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:46,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5393 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5387 trivial. 0 not checked. [2021-11-23 02:59:47,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:47,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326632015] [2021-11-23 02:59:47,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326632015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:47,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:47,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:59:47,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272142504] [2021-11-23 02:59:47,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:47,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:59:47,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:47,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:59:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:47,050 INFO L87 Difference]: Start difference. First operand 9325 states and 14596 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-23 02:59:49,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:51,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:55,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:59:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:56,302 INFO L93 Difference]: Finished difference Result 9333 states and 14602 transitions. [2021-11-23 02:59:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:59:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 442 [2021-11-23 02:59:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:56,368 INFO L225 Difference]: With dead ends: 9333 [2021-11-23 02:59:56,368 INFO L226 Difference]: Without dead ends: 9331 [2021-11-23 02:59:56,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:59:56,379 INFO L933 BasicCegarLoop]: 3522 mSDtfsCounter, 3742 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 10565 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:56,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 10565 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:59:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2021-11-23 02:59:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 9329. [2021-11-23 02:59:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9329 states, 4367 states have (on average 1.2560109915273643) internal successors, (5485), 4507 states have internal predecessors, (5485), 4520 states have call successors, (4520), 441 states have call predecessors, (4520), 439 states have return successors, (4594), 4436 states have call predecessors, (4594), 4516 states have call successors, (4594) [2021-11-23 02:59:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9329 states to 9329 states and 14599 transitions. [2021-11-23 02:59:57,362 INFO L78 Accepts]: Start accepts. Automaton has 9329 states and 14599 transitions. Word has length 442 [2021-11-23 02:59:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:57,363 INFO L470 AbstractCegarLoop]: Abstraction has 9329 states and 14599 transitions. [2021-11-23 02:59:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-23 02:59:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9329 states and 14599 transitions. [2021-11-23 02:59:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-23 02:59:57,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:57,385 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:59:57,385 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:59:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1428634155, now seen corresponding path program 1 times [2021-11-23 02:59:57,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:57,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556526273] [2021-11-23 02:59:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:57,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5399 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5391 trivial. 0 not checked. [2021-11-23 02:59:57,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:57,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556526273] [2021-11-23 02:59:57,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556526273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:57,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:57,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:59:57,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494963805] [2021-11-23 02:59:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:57,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:59:57,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:59:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:57,814 INFO L87 Difference]: Start difference. First operand 9329 states and 14599 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 02:59:59,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:01,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:04,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:05,558 INFO L93 Difference]: Finished difference Result 9337 states and 14605 transitions. [2021-11-23 03:00:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:00:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 443 [2021-11-23 03:00:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:05,627 INFO L225 Difference]: With dead ends: 9337 [2021-11-23 03:00:05,628 INFO L226 Difference]: Without dead ends: 9335 [2021-11-23 03:00:05,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:00:05,638 INFO L933 BasicCegarLoop]: 3522 mSDtfsCounter, 3743 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 10565 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:05,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 10565 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 03:00:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-11-23 03:00:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 9333. [2021-11-23 03:00:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9333 states, 4370 states have (on average 1.2558352402745996) internal successors, (5488), 4510 states have internal predecessors, (5488), 4520 states have call successors, (4520), 442 states have call predecessors, (4520), 440 states have return successors, (4594), 4436 states have call predecessors, (4594), 4516 states have call successors, (4594) [2021-11-23 03:00:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 14602 transitions. [2021-11-23 03:00:06,609 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 14602 transitions. Word has length 443 [2021-11-23 03:00:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:06,610 INFO L470 AbstractCegarLoop]: Abstraction has 9333 states and 14602 transitions. [2021-11-23 03:00:06,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (51), 3 states have call predecessors, (51), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:00:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 14602 transitions. [2021-11-23 03:00:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-11-23 03:00:06,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:06,629 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:00:06,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:00:06,629 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:00:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1345764855, now seen corresponding path program 1 times [2021-11-23 03:00:06,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879257218] [2021-11-23 03:00:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:06,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5425 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2021-11-23 03:00:07,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879257218] [2021-11-23 03:00:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879257218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:07,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:00:07,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:00:07,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017341243] [2021-11-23 03:00:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:07,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:00:07,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:00:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:00:07,076 INFO L87 Difference]: Start difference. First operand 9333 states and 14602 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-23 03:00:09,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:12,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:14,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:15,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:16,195 INFO L93 Difference]: Finished difference Result 9347 states and 14615 transitions. [2021-11-23 03:00:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:00:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 452 [2021-11-23 03:00:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:16,254 INFO L225 Difference]: With dead ends: 9347 [2021-11-23 03:00:16,254 INFO L226 Difference]: Without dead ends: 9345 [2021-11-23 03:00:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:00:16,265 INFO L933 BasicCegarLoop]: 3513 mSDtfsCounter, 3739 mSDsluCounter, 7717 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3749 SdHoareTripleChecker+Valid, 10533 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:16,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3749 Valid, 10533 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2021-11-23 03:00:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2021-11-23 03:00:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 9345. [2021-11-23 03:00:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9345 states, 4377 states have (on average 1.2554260909298607) internal successors, (5495), 4518 states have internal predecessors, (5495), 4520 states have call successors, (4520), 446 states have call predecessors, (4520), 445 states have return successors, (4598), 4436 states have call predecessors, (4598), 4516 states have call successors, (4598) [2021-11-23 03:00:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9345 states to 9345 states and 14613 transitions. [2021-11-23 03:00:17,257 INFO L78 Accepts]: Start accepts. Automaton has 9345 states and 14613 transitions. Word has length 452 [2021-11-23 03:00:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 9345 states and 14613 transitions. [2021-11-23 03:00:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-23 03:00:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9345 states and 14613 transitions. [2021-11-23 03:00:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-23 03:00:17,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:17,283 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:00:17,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:00:17,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:00:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -422811767, now seen corresponding path program 1 times [2021-11-23 03:00:17,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:17,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013959265] [2021-11-23 03:00:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:17,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5447 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5435 trivial. 0 not checked. [2021-11-23 03:00:17,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013959265] [2021-11-23 03:00:17,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013959265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:17,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:00:17,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:00:17,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106992401] [2021-11-23 03:00:17,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:17,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:00:17,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:00:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:00:17,757 INFO L87 Difference]: Start difference. First operand 9345 states and 14613 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:00:19,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:21,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:23,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:27,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:28,211 INFO L93 Difference]: Finished difference Result 9529 states and 14788 transitions. [2021-11-23 03:00:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:00:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 457 [2021-11-23 03:00:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:28,281 INFO L225 Difference]: With dead ends: 9529 [2021-11-23 03:00:28,282 INFO L226 Difference]: Without dead ends: 9527 [2021-11-23 03:00:28,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:00:28,294 INFO L933 BasicCegarLoop]: 3529 mSDtfsCounter, 3614 mSDsluCounter, 7948 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3619 SdHoareTripleChecker+Valid, 10743 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:28,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3619 Valid, 10743 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1099 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 03:00:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-11-23 03:00:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9523. [2021-11-23 03:00:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9523 states, 4474 states have (on average 1.252123379526151) internal successors, (5602), 4615 states have internal predecessors, (5602), 4551 states have call successors, (4551), 496 states have call predecessors, (4551), 495 states have return successors, (4629), 4467 states have call predecessors, (4629), 4547 states have call successors, (4629) [2021-11-23 03:00:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 14782 transitions. [2021-11-23 03:00:29,363 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 14782 transitions. Word has length 457 [2021-11-23 03:00:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:29,366 INFO L470 AbstractCegarLoop]: Abstraction has 9523 states and 14782 transitions. [2021-11-23 03:00:29,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (55), 3 states have call predecessors, (55), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:00:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 14782 transitions. [2021-11-23 03:00:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-23 03:00:29,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:29,395 INFO L514 BasicCegarLoop]: trace histogram [40, 36, 36, 36, 36, 36, 36, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:00:29,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:00:29,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:00:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1753101879, now seen corresponding path program 1 times [2021-11-23 03:00:29,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:29,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604722184] [2021-11-23 03:00:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:29,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5473 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5459 trivial. 0 not checked. [2021-11-23 03:00:29,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:29,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604722184] [2021-11-23 03:00:29,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604722184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:29,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:00:29,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:00:29,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279005889] [2021-11-23 03:00:29,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:00:29,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:00:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:00:29,818 INFO L87 Difference]: Start difference. First operand 9523 states and 14782 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-23 03:00:31,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:33,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:35,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:39,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:40,071 INFO L93 Difference]: Finished difference Result 9531 states and 14788 transitions. [2021-11-23 03:00:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:00:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 462 [2021-11-23 03:00:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:40,221 INFO L225 Difference]: With dead ends: 9531 [2021-11-23 03:00:40,221 INFO L226 Difference]: Without dead ends: 9529 [2021-11-23 03:00:40,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:00:40,225 INFO L933 BasicCegarLoop]: 3523 mSDtfsCounter, 3741 mSDsluCounter, 7743 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3750 SdHoareTripleChecker+Valid, 10568 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:40,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3750 Valid, 10568 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1061 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 03:00:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-11-23 03:00:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 9527. [2021-11-23 03:00:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9527 states, 4477 states have (on average 1.2519544337726156) internal successors, (5605), 4618 states have internal predecessors, (5605), 4551 states have call successors, (4551), 497 states have call predecessors, (4551), 496 states have return successors, (4629), 4467 states have call predecessors, (4629), 4547 states have call successors, (4629) [2021-11-23 03:00:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9527 states to 9527 states and 14785 transitions. [2021-11-23 03:00:40,962 INFO L78 Accepts]: Start accepts. Automaton has 9527 states and 14785 transitions. Word has length 462 [2021-11-23 03:00:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:40,964 INFO L470 AbstractCegarLoop]: Abstraction has 9527 states and 14785 transitions. [2021-11-23 03:00:40,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-23 03:00:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 9527 states and 14785 transitions. [2021-11-23 03:00:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-23 03:00:40,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:40,983 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:00:40,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:00:40,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:00:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -165970737, now seen corresponding path program 1 times [2021-11-23 03:00:40,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140498217] [2021-11-23 03:00:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:40,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2021-11-23 03:00:41,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140498217] [2021-11-23 03:00:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140498217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:41,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:00:41,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:00:41,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590328249] [2021-11-23 03:00:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:00:41,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:00:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:00:41,322 INFO L87 Difference]: Start difference. First operand 9527 states and 14785 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:00:45,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:47,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:00:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:49,278 INFO L93 Difference]: Finished difference Result 28152 states and 43796 transitions. [2021-11-23 03:00:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:00:49,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 464 [2021-11-23 03:00:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:49,373 INFO L225 Difference]: With dead ends: 28152 [2021-11-23 03:00:49,373 INFO L226 Difference]: Without dead ends: 18698 [2021-11-23 03:00:49,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:00:49,471 INFO L933 BasicCegarLoop]: 4673 mSDtfsCounter, 3616 mSDsluCounter, 3785 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3620 SdHoareTripleChecker+Valid, 8139 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:49,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3620 Valid, 8139 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 755 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 03:00:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18698 states. [2021-11-23 03:00:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18698 to 18616. [2021-11-23 03:00:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18616 states, 8708 states have (on average 1.2473587505741845) internal successors, (10862), 8988 states have internal predecessors, (10862), 8929 states have call successors, (8929), 978 states have call predecessors, (8929), 976 states have return successors, (9195), 8761 states have call predecessors, (9195), 8925 states have call successors, (9195) [2021-11-23 03:00:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18616 states to 18616 states and 28986 transitions. [2021-11-23 03:00:51,181 INFO L78 Accepts]: Start accepts. Automaton has 18616 states and 28986 transitions. Word has length 464 [2021-11-23 03:00:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 18616 states and 28986 transitions. [2021-11-23 03:00:51,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:00:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18616 states and 28986 transitions. [2021-11-23 03:00:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-11-23 03:00:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:51,204 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:00:51,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:00:51,205 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:00:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1637088479, now seen corresponding path program 1 times [2021-11-23 03:00:51,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:51,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339071002] [2021-11-23 03:00:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:51,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2021-11-23 03:00:51,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:51,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339071002] [2021-11-23 03:00:51,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339071002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:51,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:00:51,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:00:51,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034792346] [2021-11-23 03:00:51,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:51,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:00:51,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:00:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:00:51,584 INFO L87 Difference]: Start difference. First operand 18616 states and 28986 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:00:55,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:00:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:58,896 INFO L93 Difference]: Finished difference Result 55159 states and 86053 transitions. [2021-11-23 03:00:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:00:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 463 [2021-11-23 03:00:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:59,124 INFO L225 Difference]: With dead ends: 55159 [2021-11-23 03:00:59,125 INFO L226 Difference]: Without dead ends: 36616 [2021-11-23 03:00:59,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:00:59,228 INFO L933 BasicCegarLoop]: 4676 mSDtfsCounter, 3618 mSDsluCounter, 3785 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3622 SdHoareTripleChecker+Valid, 8142 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:59,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3622 Valid, 8142 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 758 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 03:00:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2021-11-23 03:01:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 36526. [2021-11-23 03:01:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36526 states, 17026 states have (on average 1.2411605779396218) internal successors, (21132), 17580 states have internal predecessors, (21132), 17569 states have call successors, (17569), 1932 states have call predecessors, (17569), 1928 states have return successors, (18281), 17237 states have call predecessors, (18281), 17565 states have call successors, (18281) [2021-11-23 03:01:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36526 states to 36526 states and 56982 transitions. [2021-11-23 03:01:02,950 INFO L78 Accepts]: Start accepts. Automaton has 36526 states and 56982 transitions. Word has length 463 [2021-11-23 03:01:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:01:02,951 INFO L470 AbstractCegarLoop]: Abstraction has 36526 states and 56982 transitions. [2021-11-23 03:01:02,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:01:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36526 states and 56982 transitions. [2021-11-23 03:01:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-23 03:01:02,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:01:02,972 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:01:02,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:01:02,972 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:01:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:01:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 278718020, now seen corresponding path program 1 times [2021-11-23 03:01:02,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:01:02,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158997359] [2021-11-23 03:01:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:01:02,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:01:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:01:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2021-11-23 03:01:03,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:01:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158997359] [2021-11-23 03:01:03,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158997359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:01:03,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:01:03,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:01:03,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080170334] [2021-11-23 03:01:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:01:03,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:01:03,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:01:03,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:01:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:01:03,341 INFO L87 Difference]: Start difference. First operand 36526 states and 56982 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 03:01:07,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:01:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:01:11,693 INFO L93 Difference]: Finished difference Result 75521 states and 117694 transitions. [2021-11-23 03:01:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:01:11,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 485 [2021-11-23 03:01:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:01:12,061 INFO L225 Difference]: With dead ends: 75521 [2021-11-23 03:01:12,061 INFO L226 Difference]: Without dead ends: 39068 [2021-11-23 03:01:12,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:01:12,207 INFO L933 BasicCegarLoop]: 5414 mSDtfsCounter, 3371 mSDsluCounter, 3806 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3376 SdHoareTripleChecker+Valid, 8891 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:01:12,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3376 Valid, 8891 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 03:01:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-11-23 03:01:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 38992. [2021-11-23 03:01:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38992 states, 17894 states have (on average 1.2299653515144742) internal successors, (22009), 18539 states have internal predecessors, (22009), 18954 states have call successors, (18954), 2150 states have call predecessors, (18954), 2141 states have return successors, (19632), 18544 states have call predecessors, (19632), 18950 states have call successors, (19632) [2021-11-23 03:01:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38992 states to 38992 states and 60595 transitions. [2021-11-23 03:01:16,222 INFO L78 Accepts]: Start accepts. Automaton has 38992 states and 60595 transitions. Word has length 485 [2021-11-23 03:01:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:01:16,222 INFO L470 AbstractCegarLoop]: Abstraction has 38992 states and 60595 transitions. [2021-11-23 03:01:16,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 03:01:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 38992 states and 60595 transitions. [2021-11-23 03:01:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-11-23 03:01:16,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:01:16,240 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:01:16,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:01:16,240 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 03:01:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:01:16,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1180869103, now seen corresponding path program 1 times [2021-11-23 03:01:16,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:01:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902608553] [2021-11-23 03:01:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:01:16,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:01:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:01:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2021-11-23 03:01:16,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:01:16,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902608553] [2021-11-23 03:01:16,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902608553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:01:16,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:01:16,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:01:16,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001646450] [2021-11-23 03:01:16,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:01:16,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:01:16,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:01:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:01:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:01:16,586 INFO L87 Difference]: Start difference. First operand 38992 states and 60595 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:01:18,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:01:20,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:01:23,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:01:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:01:30,086 INFO L93 Difference]: Finished difference Result 111607 states and 173763 transitions. [2021-11-23 03:01:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:01:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 461 [2021-11-23 03:01:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:01:30,737 INFO L225 Difference]: With dead ends: 111607 [2021-11-23 03:01:30,738 INFO L226 Difference]: Without dead ends: 72688 [2021-11-23 03:01:31,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:01:31,002 INFO L933 BasicCegarLoop]: 4668 mSDtfsCounter, 3607 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 8134 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:01:31,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3614 Valid, 8134 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 756 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 03:01:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72688 states. [2021-11-23 03:01:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72688 to 72570. [2021-11-23 03:01:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72570 states, 33186 states have (on average 1.223738926053155) internal successors, (40611), 34403 states have internal predecessors, (40611), 35370 states have call successors, (35370), 4036 states have call predecessors, (35370), 4011 states have return successors, (36944), 34588 states have call predecessors, (36944), 35366 states have call successors, (36944) [2021-11-23 03:01:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72570 states to 72570 states and 112925 transitions. [2021-11-23 03:01:39,536 INFO L78 Accepts]: Start accepts. Automaton has 72570 states and 112925 transitions. Word has length 461 [2021-11-23 03:01:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:01:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 72570 states and 112925 transitions. [2021-11-23 03:01:39,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:01:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 72570 states and 112925 transitions. [2021-11-23 03:01:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-11-23 03:01:39,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:01:39,556 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:01:39,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:01:39,557 INFO L402 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)] === [2021-11-23 03:01:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:01:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1773337917, now seen corresponding path program 1 times [2021-11-23 03:01:39,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:01:39,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790828749] [2021-11-23 03:01:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:01:39,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:01:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:01:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5138 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2021-11-23 03:01:40,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:01:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790828749] [2021-11-23 03:01:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790828749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:01:40,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:01:40,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:01:40,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293947428] [2021-11-23 03:01:40,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:01:40,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:01:40,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:01:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:01:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:01:40,021 INFO L87 Difference]: Start difference. First operand 72570 states and 112925 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-23 03:01:43,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:01:45,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []