./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW --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 97cecdf2f398250e9c44f19d8d35ed7fcac528daa12758af85552fae0658b596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:57:13,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:57:13,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:57:13,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:57:13,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:57:13,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:57:13,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:57:13,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:57:13,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:57:13,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:57:13,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:57:13,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:57:13,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:57:13,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:57:13,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:57:13,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:57:13,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:57:13,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:57:13,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:57:13,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:57:13,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:57:13,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:57:13,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:57:13,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:57:13,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:57:13,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:57:13,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:57:13,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:57:13,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:57:13,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:57:13,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:57:13,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:57:13,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:57:13,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:57:13,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:57:13,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:57:13,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:57:13,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:57:13,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:57:13,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:57:13,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:57:13,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 13:57:13,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:57:13,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:57:13,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:57:13,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:57:13,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:57:13,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:57:13,934 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:57:13,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:57:13,934 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:57:13,934 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:57:13,935 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:57:13,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:57:13,935 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:57:13,935 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:57:13,936 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:57:13,936 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:57:13,936 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:57:13,937 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:57:13,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:57:13,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:57:13,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:57:13,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:57:13,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:57:13,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:57:13,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:57:13,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:57:13,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:57:13,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:57:13,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:57:13,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:57:13,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:57:13,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:57:13,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:57:13,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:57:13,942 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:57:13,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:57:13,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:57:13,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:57:13,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97cecdf2f398250e9c44f19d8d35ed7fcac528daa12758af85552fae0658b596 [2022-11-23 13:57:14,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:57:14,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:57:14,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:57:14,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:57:14,197 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:57:14,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-23 13:57:17,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:57:18,050 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:57:18,051 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-23 13:57:18,130 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/data/a7d62d562/8efb0264242d4948ab638dc1ec5d05db/FLAG1a86e00ae [2022-11-23 13:57:18,151 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/data/a7d62d562/8efb0264242d4948ab638dc1ec5d05db [2022-11-23 13:57:18,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:57:18,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:57:18,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:57:18,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:57:18,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:57:18,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:18" (1/1) ... [2022-11-23 13:57:18,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3dfd46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:18, skipping insertion in model container [2022-11-23 13:57:18,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:57:18" (1/1) ... [2022-11-23 13:57:18,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:57:18,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:57:22,369 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-23 13:57:22,373 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-23 13:57:22,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-23 13:57:22,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-23 13:57:22,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:57:22,463 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:57:23,149 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[428896,428909] [2022-11-23 13:57:23,151 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429065,429078] [2022-11-23 13:57:23,152 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429232,429245] [2022-11-23 13:57:23,152 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i[429400,429413] [2022-11-23 13:57:23,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:57:23,506 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:57:23,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23 WrapperNode [2022-11-23 13:57:23,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:57:23,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:57:23,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:57:23,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:57:23,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:23,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:23,904 INFO L138 Inliner]: procedures = 614, calls = 2621, calls flagged for inlining = 322, calls inlined = 255, statements flattened = 7227 [2022-11-23 13:57:23,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:57:23,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:57:23,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:57:23,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:57:23,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:23,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:23,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:23,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:57:24,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:57:24,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:57:24,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:57:24,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (1/1) ... [2022-11-23 13:57:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:57:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:24,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:57:24,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:57:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get [2022-11-23 13:57:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get [2022-11-23 13:57:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-23 13:57:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-23 13:57:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 13:57:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 13:57:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 13:57:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 13:57:24,381 INFO L130 BoogieDeclarations]: Found specification of procedure skb_get_hash [2022-11-23 13:57:24,381 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_get_hash [2022-11-23 13:57:24,381 INFO L130 BoogieDeclarations]: Found specification of procedure tun_attach [2022-11-23 13:57:24,381 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_attach [2022-11-23 13:57:24,381 INFO L130 BoogieDeclarations]: Found specification of procedure ns_capable [2022-11-23 13:57:24,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_capable [2022-11-23 13:57:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-11-23 13:57:24,382 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-11-23 13:57:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 13:57:24,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 13:57:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure gid_valid [2022-11-23 13:57:24,383 INFO L138 BoogieDeclarations]: Found implementation of procedure gid_valid [2022-11-23 13:57:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-23 13:57:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-23 13:57:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-23 13:57:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-23 13:57:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 13:57:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 13:57:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:57:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure sock_writeable [2022-11-23 13:57:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_writeable [2022-11-23 13:57:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 13:57:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 13:57:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure iov_length [2022-11-23 13:57:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_length [2022-11-23 13:57:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 13:57:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 13:57:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure sock_put [2022-11-23 13:57:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_put [2022-11-23 13:57:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 13:57:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-23 13:57:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-23 13:57:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_iff [2022-11-23 13:57:24,387 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_iff [2022-11-23 13:57:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 13:57:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_bh_76 [2022-11-23 13:57:24,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_bh_76 [2022-11-23 13:57:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 13:57:24,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 13:57:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_detach [2022-11-23 13:57:24,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_detach [2022-11-23 13:57:24,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:57:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 13:57:24,390 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 13:57:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-23 13:57:24,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_tun_cleanup_15_2 [2022-11-23 13:57:24,390 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_all [2022-11-23 13:57:24,391 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_all [2022-11-23 13:57:24,391 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2022-11-23 13:57:24,391 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2022-11-23 13:57:24,391 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_purge [2022-11-23 13:57:24,391 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_purge [2022-11-23 13:57:24,392 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 13:57:24,392 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 13:57:24,392 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock [2022-11-23 13:57:24,392 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock [2022-11-23 13:57:24,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 13:57:24,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 13:57:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:57:24,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-23 13:57:24,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-23 13:57:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-23 13:57:24,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-23 13:57:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-23 13:57:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-23 13:57:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:57:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 13:57:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 13:57:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:57:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 13:57:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure read_pnet [2022-11-23 13:57:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure read_pnet [2022-11-23 13:57:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-23 13:57:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-23 13:57:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 13:57:24,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 13:57:24,397 INFO L130 BoogieDeclarations]: Found specification of procedure tun_setup [2022-11-23 13:57:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_setup [2022-11-23 13:57:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure skb_set_transport_header [2022-11-23 13:57:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_set_transport_header [2022-11-23 13:57:24,398 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 13:57:24,398 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 13:57:24,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 13:57:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 13:57:24,399 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_find [2022-11-23 13:57:24,399 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_find [2022-11-23 13:57:24,400 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_uninit [2022-11-23 13:57:24,400 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_uninit [2022-11-23 13:57:24,400 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 13:57:24,400 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 13:57:24,400 INFO L130 BoogieDeclarations]: Found specification of procedure synchronize_net [2022-11-23 13:57:24,400 INFO L138 BoogieDeclarations]: Found implementation of procedure synchronize_net [2022-11-23 13:57:24,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:57:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:57:24,401 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toiovecend [2022-11-23 13:57:24,401 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toiovecend [2022-11-23 13:57:24,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-23 13:57:24,405 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-23 13:57:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flags [2022-11-23 13:57:24,406 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flags [2022-11-23 13:57:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure __kuid_val [2022-11-23 13:57:24,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __kuid_val [2022-11-23 13:57:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 13:57:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure uid_valid [2022-11-23 13:57:24,408 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_valid [2022-11-23 13:57:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 13:57:24,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 13:57:24,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 13:57:24,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 13:57:24,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 13:57:24,415 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 13:57:24,416 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 13:57:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-23 13:57:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-23 13:57:24,416 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-23 13:57:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rtnl_is_held [2022-11-23 13:57:24,416 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rtnl_is_held [2022-11-23 13:57:24,416 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 13:57:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 13:57:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2022-11-23 13:57:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2022-11-23 13:57:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 13:57:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 13:57:24,417 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_get [2022-11-23 13:57:24,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_get [2022-11-23 13:57:24,418 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-23 13:57:24,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-23 13:57:24,418 INFO L130 BoogieDeclarations]: Found specification of procedure sk_attach_filter [2022-11-23 13:57:24,418 INFO L138 BoogieDeclarations]: Found implementation of procedure sk_attach_filter [2022-11-23 13:57:24,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:57:24,418 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 13:57:24,418 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 13:57:24,418 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2022-11-23 13:57:24,419 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2022-11-23 13:57:24,419 INFO L130 BoogieDeclarations]: Found specification of procedure put_net [2022-11-23 13:57:24,419 INFO L138 BoogieDeclarations]: Found implementation of procedure put_net [2022-11-23 13:57:24,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:57:24,419 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_datagram_const_iovec [2022-11-23 13:57:24,419 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_datagram_const_iovec [2022-11-23 13:57:24,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:57:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 13:57:24,420 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 13:57:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure tun_get_user [2022-11-23 13:57:24,420 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_get_user [2022-11-23 13:57:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-11-23 13:57:24,420 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-11-23 13:57:24,420 INFO L130 BoogieDeclarations]: Found specification of procedure __tun_chr_ioctl [2022-11-23 13:57:24,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __tun_chr_ioctl [2022-11-23 13:57:24,421 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 13:57:24,421 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 13:57:24,421 INFO L130 BoogieDeclarations]: Found specification of procedure tun_flow_delete [2022-11-23 13:57:24,421 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_flow_delete [2022-11-23 13:57:24,422 INFO L130 BoogieDeclarations]: Found specification of procedure sock_rps_reset_flow_hash [2022-11-23 13:57:24,422 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_rps_reset_flow_hash [2022-11-23 13:57:24,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 13:57:24,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 13:57:24,422 INFO L130 BoogieDeclarations]: Found specification of procedure tun_queue_purge [2022-11-23 13:57:24,422 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_queue_purge [2022-11-23 13:57:24,422 INFO L130 BoogieDeclarations]: Found specification of procedure tun_hashfn [2022-11-23 13:57:24,422 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_hashfn [2022-11-23 13:57:24,423 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 13:57:24,423 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 13:57:24,423 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 13:57:24,423 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 13:57:24,423 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 13:57:24,423 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 13:57:24,423 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2022-11-23 13:57:24,424 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2022-11-23 13:57:24,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_bh_75 [2022-11-23 13:57:24,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_bh_75 [2022-11-23 13:57:24,425 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 13:57:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 13:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure tun_enable_queue [2022-11-23 13:57:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_enable_queue [2022-11-23 13:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure security_tun_dev_free_security [2022-11-23 13:57:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure security_tun_dev_free_security [2022-11-23 13:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure hold_net [2022-11-23 13:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure hold_net [2022-11-23 13:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure tun_set_real_num_queues [2022-11-23 13:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_set_real_num_queues [2022-11-23 13:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 13:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 13:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure uid_eq [2022-11-23 13:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure uid_eq [2022-11-23 13:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_link_unregister [2022-11-23 13:57:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_link_unregister [2022-11-23 13:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure tun_do_read [2022-11-23 13:57:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_do_read [2022-11-23 13:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 13:57:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 13:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure __kgid_val [2022-11-23 13:57:24,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __kgid_val [2022-11-23 13:57:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 13:57:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 13:57:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2022-11-23 13:57:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2022-11-23 13:57:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-23 13:57:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-23 13:57:24,429 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-11-23 13:57:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-11-23 13:57:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-23 13:57:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-23 13:57:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 13:57:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 13:57:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-23 13:57:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-23 13:57:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure tun_detach_filter [2022-11-23 13:57:24,431 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_detach_filter [2022-11-23 13:57:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromiovecend [2022-11-23 13:57:24,431 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromiovecend [2022-11-23 13:57:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_up [2022-11-23 13:57:24,431 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_up [2022-11-23 13:57:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 13:57:24,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 13:57:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2022-11-23 13:57:24,432 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2022-11-23 13:57:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure tun_put [2022-11-23 13:57:24,432 INFO L138 BoogieDeclarations]: Found implementation of procedure tun_put [2022-11-23 13:57:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:57:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 13:57:24,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 13:57:25,513 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:57:25,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:57:26,129 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 13:57:30,813 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-23 13:57:30,937 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:57:33,429 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:57:33,429 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-23 13:57:33,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:33 BoogieIcfgContainer [2022-11-23 13:57:33,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:57:33,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:57:33,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:57:33,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:57:33,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:57:18" (1/3) ... [2022-11-23 13:57:33,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab0d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:33, skipping insertion in model container [2022-11-23 13:57:33,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:57:23" (2/3) ... [2022-11-23 13:57:33,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab0d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:57:33, skipping insertion in model container [2022-11-23 13:57:33,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:57:33" (3/3) ... [2022-11-23 13:57:33,442 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-tun.cil.i [2022-11-23 13:57:33,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:57:33,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 13:57:33,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:57:33,585 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b454cd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:57:33,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 13:57:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 1539 states, 950 states have (on average 1.3642105263157895) internal successors, (1296), 986 states have internal predecessors, (1296), 481 states have call successors, (481), 106 states have call predecessors, (481), 105 states have return successors, (474), 473 states have call predecessors, (474), 474 states have call successors, (474) [2022-11-23 13:57:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-23 13:57:33,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:33,635 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:33,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:57:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 270858453, now seen corresponding path program 1 times [2022-11-23 13:57:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:33,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326454255] [2022-11-23 13:57:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-23 13:57:34,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326454255] [2022-11-23 13:57:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326454255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:34,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:34,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129504726] [2022-11-23 13:57:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:34,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:34,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:34,895 INFO L87 Difference]: Start difference. First operand has 1539 states, 950 states have (on average 1.3642105263157895) internal successors, (1296), 986 states have internal predecessors, (1296), 481 states have call successors, (481), 106 states have call predecessors, (481), 105 states have return successors, (474), 473 states have call predecessors, (474), 474 states have call successors, (474) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 13:57:40,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:40,636 INFO L93 Difference]: Finished difference Result 4457 states and 6606 transitions. [2022-11-23 13:57:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:40,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 291 [2022-11-23 13:57:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:40,681 INFO L225 Difference]: With dead ends: 4457 [2022-11-23 13:57:40,682 INFO L226 Difference]: Without dead ends: 2957 [2022-11-23 13:57:40,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:40,698 INFO L413 NwaCegarLoop]: 2421 mSDtfsCounter, 2120 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 4302 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:40,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2120 Valid, 4302 Invalid, 711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-23 13:57:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-11-23 13:57:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2927. [2022-11-23 13:57:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 1826 states have (on average 1.364184008762322) internal successors, (2491), 1901 states have internal predecessors, (2491), 893 states have call successors, (893), 207 states have call predecessors, (893), 205 states have return successors, (897), 881 states have call predecessors, (897), 889 states have call successors, (897) [2022-11-23 13:57:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4281 transitions. [2022-11-23 13:57:40,969 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4281 transitions. Word has length 291 [2022-11-23 13:57:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:40,971 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 4281 transitions. [2022-11-23 13:57:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 13:57:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4281 transitions. [2022-11-23 13:57:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-23 13:57:40,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:40,978 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:57:40,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:57:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1449660449, now seen corresponding path program 1 times [2022-11-23 13:57:40,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:40,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925422138] [2022-11-23 13:57:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-11-23 13:57:41,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925422138] [2022-11-23 13:57:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925422138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:41,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:41,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849238471] [2022-11-23 13:57:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:41,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:41,528 INFO L87 Difference]: Start difference. First operand 2927 states and 4281 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 13:57:45,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:47,141 INFO L93 Difference]: Finished difference Result 8559 states and 12508 transitions. [2022-11-23 13:57:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 293 [2022-11-23 13:57:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:47,181 INFO L225 Difference]: With dead ends: 8559 [2022-11-23 13:57:47,181 INFO L226 Difference]: Without dead ends: 5687 [2022-11-23 13:57:47,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:47,198 INFO L413 NwaCegarLoop]: 2282 mSDtfsCounter, 2048 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:47,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2048 Valid, 4110 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-23 13:57:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2022-11-23 13:57:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5683. [2022-11-23 13:57:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5683 states, 3574 states have (on average 1.3651371012870732) internal successors, (4879), 3714 states have internal predecessors, (4879), 1699 states have call successors, (1699), 410 states have call predecessors, (1699), 407 states have return successors, (1711), 1682 states have call predecessors, (1711), 1695 states have call successors, (1711) [2022-11-23 13:57:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5683 states to 5683 states and 8289 transitions. [2022-11-23 13:57:47,687 INFO L78 Accepts]: Start accepts. Automaton has 5683 states and 8289 transitions. Word has length 293 [2022-11-23 13:57:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:47,689 INFO L495 AbstractCegarLoop]: Abstraction has 5683 states and 8289 transitions. [2022-11-23 13:57:47,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 13:57:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5683 states and 8289 transitions. [2022-11-23 13:57:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-11-23 13:57:47,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:47,703 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 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] [2022-11-23 13:57:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:57:47,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:57:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1124327333, now seen corresponding path program 1 times [2022-11-23 13:57:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:47,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089776478] [2022-11-23 13:57:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2864 trivial. 0 not checked. [2022-11-23 13:57:48,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:48,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089776478] [2022-11-23 13:57:48,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089776478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:48,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:48,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691050045] [2022-11-23 13:57:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:48,286 INFO L87 Difference]: Start difference. First operand 5683 states and 8289 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-23 13:57:52,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:53,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:54,980 INFO L93 Difference]: Finished difference Result 11199 states and 16271 transitions. [2022-11-23 13:57:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 317 [2022-11-23 13:57:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:55,017 INFO L225 Difference]: With dead ends: 11199 [2022-11-23 13:57:55,017 INFO L226 Difference]: Without dead ends: 5571 [2022-11-23 13:57:55,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:55,046 INFO L413 NwaCegarLoop]: 2115 mSDtfsCounter, 1025 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:55,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 3941 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 13:57:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-23 13:57:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5541. [2022-11-23 13:57:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 3516 states have (on average 1.3552332195676906) internal successors, (4765), 3643 states have internal predecessors, (4765), 1605 states have call successors, (1605), 421 states have call predecessors, (1605), 417 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-23 13:57:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 7983 transitions. [2022-11-23 13:57:55,464 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 7983 transitions. Word has length 317 [2022-11-23 13:57:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 5541 states and 7983 transitions. [2022-11-23 13:57:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-23 13:57:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 7983 transitions. [2022-11-23 13:57:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-23 13:57:55,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:55,474 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:57:55,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:57:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1788083357, now seen corresponding path program 1 times [2022-11-23 13:57:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101420560] [2022-11-23 13:57:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2022-11-23 13:57:56,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:56,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101420560] [2022-11-23 13:57:56,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101420560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:56,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:56,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:57:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467527734] [2022-11-23 13:57:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:56,326 INFO L87 Difference]: Start difference. First operand 5541 states and 7983 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-23 13:57:59,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:01,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:04,101 INFO L93 Difference]: Finished difference Result 5547 states and 7988 transitions. [2022-11-23 13:58:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 329 [2022-11-23 13:58:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:04,135 INFO L225 Difference]: With dead ends: 5547 [2022-11-23 13:58:04,135 INFO L226 Difference]: Without dead ends: 5545 [2022-11-23 13:58:04,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:04,140 INFO L413 NwaCegarLoop]: 1868 mSDtfsCounter, 2137 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:04,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2151 Valid, 5588 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-23 13:58:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5545 states. [2022-11-23 13:58:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5545 to 5545. [2022-11-23 13:58:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 3519 states have (on average 1.3549303779482809) internal successors, (4768), 3646 states have internal predecessors, (4768), 1605 states have call successors, (1605), 422 states have call predecessors, (1605), 418 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-23 13:58:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 7986 transitions. [2022-11-23 13:58:04,555 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 7986 transitions. Word has length 329 [2022-11-23 13:58:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:04,556 INFO L495 AbstractCegarLoop]: Abstraction has 5545 states and 7986 transitions. [2022-11-23 13:58:04,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-23 13:58:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 7986 transitions. [2022-11-23 13:58:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-23 13:58:04,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:04,565 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:58:04,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2022764139, now seen corresponding path program 1 times [2022-11-23 13:58:04,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592013655] [2022-11-23 13:58:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2998 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2022-11-23 13:58:05,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:05,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592013655] [2022-11-23 13:58:05,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592013655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:05,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:05,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516701086] [2022-11-23 13:58:05,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:05,402 INFO L87 Difference]: Start difference. First operand 5545 states and 7986 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 13:58:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:11,335 INFO L93 Difference]: Finished difference Result 5551 states and 7991 transitions. [2022-11-23 13:58:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 334 [2022-11-23 13:58:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:11,380 INFO L225 Difference]: With dead ends: 5551 [2022-11-23 13:58:11,381 INFO L226 Difference]: Without dead ends: 5549 [2022-11-23 13:58:11,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:11,385 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:11,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2145 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 13:58:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2022-11-23 13:58:11,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 5549. [2022-11-23 13:58:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 3522 states have (on average 1.3546280522430438) internal successors, (4771), 3649 states have internal predecessors, (4771), 1605 states have call successors, (1605), 423 states have call predecessors, (1605), 419 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-23 13:58:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 7989 transitions. [2022-11-23 13:58:11,791 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 7989 transitions. Word has length 334 [2022-11-23 13:58:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:11,793 INFO L495 AbstractCegarLoop]: Abstraction has 5549 states and 7989 transitions. [2022-11-23 13:58:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 13:58:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 7989 transitions. [2022-11-23 13:58:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-23 13:58:11,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:11,802 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:58:11,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1738933533, now seen corresponding path program 1 times [2022-11-23 13:58:11,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:11,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339019471] [2022-11-23 13:58:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3004 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3000 trivial. 0 not checked. [2022-11-23 13:58:12,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:12,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339019471] [2022-11-23 13:58:12,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339019471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:12,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:12,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:12,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561017353] [2022-11-23 13:58:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:12,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:12,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:12,522 INFO L87 Difference]: Start difference. First operand 5549 states and 7989 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 13:58:16,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:19,058 INFO L93 Difference]: Finished difference Result 5555 states and 7994 transitions. [2022-11-23 13:58:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 339 [2022-11-23 13:58:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:19,097 INFO L225 Difference]: With dead ends: 5555 [2022-11-23 13:58:19,097 INFO L226 Difference]: Without dead ends: 5553 [2022-11-23 13:58:19,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:19,103 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2144 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:19,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2144 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 13:58:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2022-11-23 13:58:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 5553. [2022-11-23 13:58:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 3525 states have (on average 1.3543262411347519) internal successors, (4774), 3652 states have internal predecessors, (4774), 1605 states have call successors, (1605), 424 states have call predecessors, (1605), 420 states have return successors, (1613), 1581 states have call predecessors, (1613), 1601 states have call successors, (1613) [2022-11-23 13:58:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 7992 transitions. [2022-11-23 13:58:19,561 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 7992 transitions. Word has length 339 [2022-11-23 13:58:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:19,562 INFO L495 AbstractCegarLoop]: Abstraction has 5553 states and 7992 transitions. [2022-11-23 13:58:19,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 13:58:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 7992 transitions. [2022-11-23 13:58:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-11-23 13:58:19,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:19,572 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:19,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:58:19,572 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1479173483, now seen corresponding path program 1 times [2022-11-23 13:58:19,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:19,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316299945] [2022-11-23 13:58:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3008 trivial. 0 not checked. [2022-11-23 13:58:20,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:20,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316299945] [2022-11-23 13:58:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316299945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:20,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:20,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602234767] [2022-11-23 13:58:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:20,331 INFO L87 Difference]: Start difference. First operand 5553 states and 7992 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 13:58:24,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:26,757 INFO L93 Difference]: Finished difference Result 5934 states and 8417 transitions. [2022-11-23 13:58:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 344 [2022-11-23 13:58:26,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:26,781 INFO L225 Difference]: With dead ends: 5934 [2022-11-23 13:58:26,781 INFO L226 Difference]: Without dead ends: 5932 [2022-11-23 13:58:26,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:26,785 INFO L413 NwaCegarLoop]: 1943 mSDtfsCounter, 1981 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 6145 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:26,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 6145 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-23 13:58:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2022-11-23 13:58:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5928. [2022-11-23 13:58:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 3743 states have (on average 1.345711995725354) internal successors, (5037), 3884 states have internal predecessors, (5037), 1682 states have call successors, (1682), 502 states have call predecessors, (1682), 500 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-23 13:58:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 8413 transitions. [2022-11-23 13:58:27,186 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 8413 transitions. Word has length 344 [2022-11-23 13:58:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:27,187 INFO L495 AbstractCegarLoop]: Abstraction has 5928 states and 8413 transitions. [2022-11-23 13:58:27,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-23 13:58:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 8413 transitions. [2022-11-23 13:58:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-11-23 13:58:27,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:27,193 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:27,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:58:27,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1889082781, now seen corresponding path program 1 times [2022-11-23 13:58:27,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:27,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74177607] [2022-11-23 13:58:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3028 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-11-23 13:58:27,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74177607] [2022-11-23 13:58:27,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74177607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:27,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:27,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995240521] [2022-11-23 13:58:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:27,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:27,908 INFO L87 Difference]: Start difference. First operand 5928 states and 8413 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-23 13:58:32,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:34,524 INFO L93 Difference]: Finished difference Result 5934 states and 8418 transitions. [2022-11-23 13:58:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 349 [2022-11-23 13:58:34,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:34,554 INFO L225 Difference]: With dead ends: 5934 [2022-11-23 13:58:34,554 INFO L226 Difference]: Without dead ends: 5932 [2022-11-23 13:58:34,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:34,559 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:34,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2142 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 13:58:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2022-11-23 13:58:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5932. [2022-11-23 13:58:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5932 states, 3746 states have (on average 1.3454351308061934) internal successors, (5040), 3887 states have internal predecessors, (5040), 1682 states have call successors, (1682), 503 states have call predecessors, (1682), 501 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-23 13:58:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5932 states to 5932 states and 8416 transitions. [2022-11-23 13:58:35,015 INFO L78 Accepts]: Start accepts. Automaton has 5932 states and 8416 transitions. Word has length 349 [2022-11-23 13:58:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:35,016 INFO L495 AbstractCegarLoop]: Abstraction has 5932 states and 8416 transitions. [2022-11-23 13:58:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (40), 3 states have call predecessors, (40), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-23 13:58:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5932 states and 8416 transitions. [2022-11-23 13:58:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-11-23 13:58:35,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:35,023 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:35,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:58:35,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1106457493, now seen corresponding path program 1 times [2022-11-23 13:58:35,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:35,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088053016] [2022-11-23 13:58:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:35,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3036 trivial. 0 not checked. [2022-11-23 13:58:35,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088053016] [2022-11-23 13:58:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088053016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198014384] [2022-11-23 13:58:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:35,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:35,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:35,776 INFO L87 Difference]: Start difference. First operand 5932 states and 8416 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-23 13:58:39,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:41,847 INFO L93 Difference]: Finished difference Result 5942 states and 8423 transitions. [2022-11-23 13:58:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 354 [2022-11-23 13:58:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:41,871 INFO L225 Difference]: With dead ends: 5942 [2022-11-23 13:58:41,871 INFO L226 Difference]: Without dead ends: 5940 [2022-11-23 13:58:41,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:41,876 INFO L413 NwaCegarLoop]: 1943 mSDtfsCounter, 1981 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 6145 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:41,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1992 Valid, 6145 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-23 13:58:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-11-23 13:58:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5936. [2022-11-23 13:58:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 3749 states have (on average 1.3451587089890638) internal successors, (5043), 3890 states have internal predecessors, (5043), 1682 states have call successors, (1682), 504 states have call predecessors, (1682), 502 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-23 13:58:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8419 transitions. [2022-11-23 13:58:42,410 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8419 transitions. Word has length 354 [2022-11-23 13:58:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:42,411 INFO L495 AbstractCegarLoop]: Abstraction has 5936 states and 8419 transitions. [2022-11-23 13:58:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-23 13:58:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8419 transitions. [2022-11-23 13:58:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-11-23 13:58:42,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:42,418 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:42,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:58:42,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash -419660634, now seen corresponding path program 1 times [2022-11-23 13:58:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:42,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776103051] [2022-11-23 13:58:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3059 trivial. 0 not checked. [2022-11-23 13:58:43,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:43,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776103051] [2022-11-23 13:58:43,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776103051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:43,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:43,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071350720] [2022-11-23 13:58:43,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:43,111 INFO L87 Difference]: Start difference. First operand 5936 states and 8419 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-23 13:58:48,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:49,857 INFO L93 Difference]: Finished difference Result 5942 states and 8424 transitions. [2022-11-23 13:58:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 365 [2022-11-23 13:58:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:49,882 INFO L225 Difference]: With dead ends: 5942 [2022-11-23 13:58:49,883 INFO L226 Difference]: Without dead ends: 5940 [2022-11-23 13:58:49,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:49,888 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:49,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2139 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 13:58:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2022-11-23 13:58:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5940. [2022-11-23 13:58:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 3752 states have (on average 1.3448827292110874) internal successors, (5046), 3893 states have internal predecessors, (5046), 1682 states have call successors, (1682), 505 states have call predecessors, (1682), 503 states have return successors, (1694), 1657 states have call predecessors, (1694), 1678 states have call successors, (1694) [2022-11-23 13:58:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 8422 transitions. [2022-11-23 13:58:50,426 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 8422 transitions. Word has length 365 [2022-11-23 13:58:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:50,427 INFO L495 AbstractCegarLoop]: Abstraction has 5940 states and 8422 transitions. [2022-11-23 13:58:50,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (45), 3 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-23 13:58:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 8422 transitions. [2022-11-23 13:58:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-11-23 13:58:50,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:50,435 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:50,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:58:50,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:58:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -108881278, now seen corresponding path program 1 times [2022-11-23 13:58:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339586894] [2022-11-23 13:58:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3083 trivial. 0 not checked. [2022-11-23 13:58:51,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:51,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339586894] [2022-11-23 13:58:51,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339586894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:51,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:51,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:58:51,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892018965] [2022-11-23 13:58:51,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:51,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:58:51,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:51,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:58:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:58:51,060 INFO L87 Difference]: Start difference. First operand 5940 states and 8422 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 13:58:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:58,374 INFO L93 Difference]: Finished difference Result 6331 states and 8885 transitions. [2022-11-23 13:58:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 370 [2022-11-23 13:58:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:58,403 INFO L225 Difference]: With dead ends: 6331 [2022-11-23 13:58:58,403 INFO L226 Difference]: Without dead ends: 6329 [2022-11-23 13:58:58,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:58,408 INFO L413 NwaCegarLoop]: 1903 mSDtfsCounter, 2028 mSDsluCounter, 3957 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 5860 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:58,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 5860 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 13:58:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-11-23 13:58:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6329. [2022-11-23 13:58:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 3989 states have (on average 1.3374279267986964) internal successors, (5335), 4138 states have internal predecessors, (5335), 1768 states have call successors, (1768), 571 states have call predecessors, (1768), 569 states have return successors, (1780), 1743 states have call predecessors, (1780), 1764 states have call successors, (1780) [2022-11-23 13:58:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8883 transitions. [2022-11-23 13:58:59,028 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8883 transitions. Word has length 370 [2022-11-23 13:58:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:59,029 INFO L495 AbstractCegarLoop]: Abstraction has 6329 states and 8883 transitions. [2022-11-23 13:58:59,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 13:58:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8883 transitions. [2022-11-23 13:58:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-23 13:58:59,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:59,037 INFO L195 NwaCegarLoop]: trace histogram [31, 27, 27, 27, 27, 27, 27, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:59,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:58:59,038 INFO L420 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)] === [2022-11-23 13:58:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1542392123, now seen corresponding path program 1 times [2022-11-23 13:58:59,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:59,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052362176] [2022-11-23 13:58:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2022-11-23 13:58:59,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052362176] [2022-11-23 13:58:59,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052362176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:59,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:59,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:58:59,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452209044] [2022-11-23 13:58:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:59,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:59,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:59,455 INFO L87 Difference]: Start difference. First operand 6329 states and 8883 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-23 13:59:05,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:05,352 INFO L93 Difference]: Finished difference Result 12771 states and 17927 transitions. [2022-11-23 13:59:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:59:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 369 [2022-11-23 13:59:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:05,381 INFO L225 Difference]: With dead ends: 12771 [2022-11-23 13:59:05,381 INFO L226 Difference]: Without dead ends: 7854 [2022-11-23 13:59:05,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:59:05,397 INFO L413 NwaCegarLoop]: 2714 mSDtfsCounter, 1023 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4531 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:05,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 4531 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 917 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 13:59:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2022-11-23 13:59:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7792. [2022-11-23 13:59:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 4923 states have (on average 1.3384115376802763) internal successors, (6589), 5105 states have internal predecessors, (6589), 2170 states have call successors, (2170), 700 states have call predecessors, (2170), 696 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 10943 transitions. [2022-11-23 13:59:06,072 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 10943 transitions. Word has length 369 [2022-11-23 13:59:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:06,073 INFO L495 AbstractCegarLoop]: Abstraction has 7792 states and 10943 transitions. [2022-11-23 13:59:06,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-23 13:59:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 10943 transitions. [2022-11-23 13:59:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-23 13:59:06,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:06,084 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 9, 8, 8, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:06,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:59:06,084 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2127420902, now seen corresponding path program 1 times [2022-11-23 13:59:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556071277] [2022-11-23 13:59:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:06,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3111 trivial. 0 not checked. [2022-11-23 13:59:06,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:06,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556071277] [2022-11-23 13:59:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556071277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:06,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:59:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800192294] [2022-11-23 13:59:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:06,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:59:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:59:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:59:06,793 INFO L87 Difference]: Start difference. First operand 7792 states and 10943 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 13:59:12,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:13,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:14,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:14,688 INFO L93 Difference]: Finished difference Result 7798 states and 10948 transitions. [2022-11-23 13:59:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:59:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 375 [2022-11-23 13:59:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:14,721 INFO L225 Difference]: With dead ends: 7798 [2022-11-23 13:59:14,721 INFO L226 Difference]: Without dead ends: 7796 [2022-11-23 13:59:14,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:14,727 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:14,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 13:59:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2022-11-23 13:59:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 7796. [2022-11-23 13:59:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7796 states, 4926 states have (on average 1.3382054405196915) internal successors, (6592), 5108 states have internal predecessors, (6592), 2170 states have call successors, (2170), 701 states have call predecessors, (2170), 697 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 10946 transitions. [2022-11-23 13:59:15,517 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 10946 transitions. Word has length 375 [2022-11-23 13:59:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:15,518 INFO L495 AbstractCegarLoop]: Abstraction has 7796 states and 10946 transitions. [2022-11-23 13:59:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 13:59:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 10946 transitions. [2022-11-23 13:59:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-23 13:59:15,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:15,526 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 10, 9, 9, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 13:59:15,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash -823062095, now seen corresponding path program 1 times [2022-11-23 13:59:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:15,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076725992] [2022-11-23 13:59:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-11-23 13:59:16,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076725992] [2022-11-23 13:59:16,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076725992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:16,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:16,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:59:16,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172890625] [2022-11-23 13:59:16,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:59:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:59:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:59:16,307 INFO L87 Difference]: Start difference. First operand 7796 states and 10946 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-23 13:59:21,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:23,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:25,025 INFO L93 Difference]: Finished difference Result 7802 states and 10951 transitions. [2022-11-23 13:59:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:59:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 379 [2022-11-23 13:59:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:25,056 INFO L225 Difference]: With dead ends: 7802 [2022-11-23 13:59:25,057 INFO L226 Difference]: Without dead ends: 7800 [2022-11-23 13:59:25,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:25,063 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:25,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2136 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-23 13:59:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-11-23 13:59:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 7800. [2022-11-23 13:59:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 4929 states have (on average 1.3379995942381822) internal successors, (6595), 5111 states have internal predecessors, (6595), 2170 states have call successors, (2170), 702 states have call predecessors, (2170), 698 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 10949 transitions. [2022-11-23 13:59:25,922 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 10949 transitions. Word has length 379 [2022-11-23 13:59:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:25,923 INFO L495 AbstractCegarLoop]: Abstraction has 7800 states and 10949 transitions. [2022-11-23 13:59:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-23 13:59:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 10949 transitions. [2022-11-23 13:59:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-23 13:59:25,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:25,932 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:25,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 13:59:25,932 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1158625507, now seen corresponding path program 1 times [2022-11-23 13:59:25,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:25,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448145409] [2022-11-23 13:59:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3176 trivial. 0 not checked. [2022-11-23 13:59:26,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448145409] [2022-11-23 13:59:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448145409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:26,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:26,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:59:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299283164] [2022-11-23 13:59:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:26,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:59:26,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:26,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:59:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:59:26,518 INFO L87 Difference]: Start difference. First operand 7800 states and 10949 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 13:59:31,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:33,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:34,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:34,717 INFO L93 Difference]: Finished difference Result 7806 states and 10954 transitions. [2022-11-23 13:59:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:59:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 379 [2022-11-23 13:59:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:34,746 INFO L225 Difference]: With dead ends: 7806 [2022-11-23 13:59:34,747 INFO L226 Difference]: Without dead ends: 7804 [2022-11-23 13:59:34,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:34,752 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:34,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2136 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-23 13:59:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7804 states. [2022-11-23 13:59:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7804 to 7804. [2022-11-23 13:59:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 4932 states have (on average 1.3377939983779399) internal successors, (6598), 5114 states have internal predecessors, (6598), 2170 states have call successors, (2170), 703 states have call predecessors, (2170), 699 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 10952 transitions. [2022-11-23 13:59:35,545 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 10952 transitions. Word has length 379 [2022-11-23 13:59:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:35,545 INFO L495 AbstractCegarLoop]: Abstraction has 7804 states and 10952 transitions. [2022-11-23 13:59:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-23 13:59:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 10952 transitions. [2022-11-23 13:59:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-23 13:59:35,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:35,555 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 13:59:35,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1875795605, now seen corresponding path program 1 times [2022-11-23 13:59:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402821887] [2022-11-23 13:59:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3238 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3216 trivial. 0 not checked. [2022-11-23 13:59:36,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402821887] [2022-11-23 13:59:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402821887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:36,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:36,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:59:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194110491] [2022-11-23 13:59:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:36,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:59:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:59:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:59:36,164 INFO L87 Difference]: Start difference. First operand 7804 states and 10952 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2022-11-23 13:59:42,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:44,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:44,813 INFO L93 Difference]: Finished difference Result 7810 states and 10957 transitions. [2022-11-23 13:59:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:59:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 384 [2022-11-23 13:59:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:44,845 INFO L225 Difference]: With dead ends: 7810 [2022-11-23 13:59:44,846 INFO L226 Difference]: Without dead ends: 7808 [2022-11-23 13:59:44,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:44,852 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2132 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:44,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2135 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1073 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 13:59:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-11-23 13:59:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7808. [2022-11-23 13:59:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7808 states, 4935 states have (on average 1.3375886524822695) internal successors, (6601), 5117 states have internal predecessors, (6601), 2170 states have call successors, (2170), 704 states have call predecessors, (2170), 700 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 10955 transitions. [2022-11-23 13:59:45,729 INFO L78 Accepts]: Start accepts. Automaton has 7808 states and 10955 transitions. Word has length 384 [2022-11-23 13:59:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:45,731 INFO L495 AbstractCegarLoop]: Abstraction has 7808 states and 10955 transitions. [2022-11-23 13:59:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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) [2022-11-23 13:59:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7808 states and 10955 transitions. [2022-11-23 13:59:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-23 13:59:45,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:45,743 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 13, 12, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:59:45,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 13:59:45,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1925923735, now seen corresponding path program 1 times [2022-11-23 13:59:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:45,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991358240] [2022-11-23 13:59:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3262 trivial. 0 not checked. [2022-11-23 13:59:46,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:46,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991358240] [2022-11-23 13:59:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991358240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:46,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:46,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:59:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519275202] [2022-11-23 13:59:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:59:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:59:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:59:46,486 INFO L87 Difference]: Start difference. First operand 7808 states and 10955 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 13:59:48,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:53,789 INFO L93 Difference]: Finished difference Result 7814 states and 10960 transitions. [2022-11-23 13:59:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:59:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 394 [2022-11-23 13:59:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:53,822 INFO L225 Difference]: With dead ends: 7814 [2022-11-23 13:59:53,822 INFO L226 Difference]: Without dead ends: 7812 [2022-11-23 13:59:53,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:53,828 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:53,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2133 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 13:59:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-11-23 13:59:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 7812. [2022-11-23 13:59:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 4938 states have (on average 1.3373835560955853) internal successors, (6604), 5120 states have internal predecessors, (6604), 2170 states have call successors, (2170), 705 states have call predecessors, (2170), 701 states have return successors, (2184), 2134 states have call predecessors, (2184), 2166 states have call successors, (2184) [2022-11-23 13:59:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 10958 transitions. [2022-11-23 13:59:54,637 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 10958 transitions. Word has length 394 [2022-11-23 13:59:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:54,638 INFO L495 AbstractCegarLoop]: Abstraction has 7812 states and 10958 transitions. [2022-11-23 13:59:54,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 13:59:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 10958 transitions. [2022-11-23 13:59:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-23 13:59:54,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:54,650 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 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] [2022-11-23 13:59:54,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 13:59:54,650 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 13:59:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1616682341, now seen corresponding path program 1 times [2022-11-23 13:59:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568512969] [2022-11-23 13:59:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2022-11-23 13:59:55,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568512969] [2022-11-23 13:59:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568512969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:55,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:55,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:59:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359939617] [2022-11-23 13:59:55,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:55,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:59:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:59:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:59:55,185 INFO L87 Difference]: Start difference. First operand 7812 states and 10958 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 14:00:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:02,029 INFO L93 Difference]: Finished difference Result 18952 states and 26552 transitions. [2022-11-23 14:00:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:00:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 405 [2022-11-23 14:00:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:02,067 INFO L225 Difference]: With dead ends: 18952 [2022-11-23 14:00:02,067 INFO L226 Difference]: Without dead ends: 11195 [2022-11-23 14:00:02,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:00:02,100 INFO L413 NwaCegarLoop]: 2629 mSDtfsCounter, 2031 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2031 SdHoareTripleChecker+Valid, 4477 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:02,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2031 Valid, 4477 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 14:00:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2022-11-23 14:00:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 11103. [2022-11-23 14:00:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11103 states, 7023 states have (on average 1.3388865157340168) internal successors, (9403), 7313 states have internal predecessors, (9403), 3045 states have call successors, (3045), 1039 states have call predecessors, (3045), 1032 states have return successors, (3068), 2966 states have call predecessors, (3068), 3041 states have call successors, (3068) [2022-11-23 14:00:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11103 states to 11103 states and 15516 transitions. [2022-11-23 14:00:03,262 INFO L78 Accepts]: Start accepts. Automaton has 11103 states and 15516 transitions. Word has length 405 [2022-11-23 14:00:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:03,263 INFO L495 AbstractCegarLoop]: Abstraction has 11103 states and 15516 transitions. [2022-11-23 14:00:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 14:00:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 11103 states and 15516 transitions. [2022-11-23 14:00:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-23 14:00:03,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:03,273 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 14, 13, 13, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:03,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:00:03,274 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:00:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 435032241, now seen corresponding path program 1 times [2022-11-23 14:00:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:03,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889011483] [2022-11-23 14:00:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 3310 trivial. 0 not checked. [2022-11-23 14:00:03,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889011483] [2022-11-23 14:00:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889011483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:03,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:03,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:00:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480989927] [2022-11-23 14:00:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:00:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:00:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:00:03,984 INFO L87 Difference]: Start difference. First operand 11103 states and 15516 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 14:00:11,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:13,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:13,704 INFO L93 Difference]: Finished difference Result 11109 states and 15521 transitions. [2022-11-23 14:00:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:00:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 399 [2022-11-23 14:00:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:13,746 INFO L225 Difference]: With dead ends: 11109 [2022-11-23 14:00:13,746 INFO L226 Difference]: Without dead ends: 11105 [2022-11-23 14:00:13,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:00:13,754 INFO L413 NwaCegarLoop]: 1871 mSDtfsCounter, 2131 mSDsluCounter, 3720 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:13,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2132 Valid, 5591 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1073 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-11-23 14:00:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11105 states. [2022-11-23 14:00:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11105 to 11105. [2022-11-23 14:00:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 7025 states have (on average 1.3386476868327402) internal successors, (9404), 7314 states have internal predecessors, (9404), 3045 states have call successors, (3045), 1040 states have call predecessors, (3045), 1032 states have return successors, (3068), 2966 states have call predecessors, (3068), 3041 states have call successors, (3068) [2022-11-23 14:00:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 15517 transitions. [2022-11-23 14:00:14,942 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 15517 transitions. Word has length 399 [2022-11-23 14:00:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 11105 states and 15517 transitions. [2022-11-23 14:00:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2022-11-23 14:00:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 15517 transitions. [2022-11-23 14:00:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-23 14:00:14,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:14,953 INFO L195 NwaCegarLoop]: trace histogram [30, 27, 27, 27, 27, 27, 27, 15, 14, 14, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:00:14,953 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:00:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1590115930, now seen corresponding path program 1 times [2022-11-23 14:00:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745656404] [2022-11-23 14:00:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:14,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3391 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3363 trivial. 0 not checked. [2022-11-23 14:00:15,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745656404] [2022-11-23 14:00:15,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745656404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:15,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:15,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:00:15,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762241776] [2022-11-23 14:00:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:00:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:00:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:00:15,665 INFO L87 Difference]: Start difference. First operand 11105 states and 15517 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (53), 3 states have call predecessors, (53), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-23 14:00:20,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:22,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:23,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:24,472 INFO L93 Difference]: Finished difference Result 11105 states and 15517 transitions. [2022-11-23 14:00:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:00:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (53), 3 states have call predecessors, (53), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 405 [2022-11-23 14:00:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:24,512 INFO L225 Difference]: With dead ends: 11105 [2022-11-23 14:00:24,513 INFO L226 Difference]: Without dead ends: 10919 [2022-11-23 14:00:24,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:00:24,519 INFO L413 NwaCegarLoop]: 1869 mSDtfsCounter, 2127 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:24,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2127 Valid, 5588 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-23 14:00:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10919 states. [2022-11-23 14:00:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10919 to 10919. [2022-11-23 14:00:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 6956 states have (on average 1.3368315123634273) internal successors, (9299), 7209 states have internal predecessors, (9299), 2951 states have call successors, (2951), 1008 states have call predecessors, (2951), 1010 states have return successors, (2978), 2917 states have call predecessors, (2978), 2951 states have call successors, (2978) [2022-11-23 14:00:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 15228 transitions. [2022-11-23 14:00:25,635 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 15228 transitions. Word has length 405 [2022-11-23 14:00:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:25,636 INFO L495 AbstractCegarLoop]: Abstraction has 10919 states and 15228 transitions. [2022-11-23 14:00:25,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (53), 3 states have call predecessors, (53), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-23 14:00:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 15228 transitions. [2022-11-23 14:00:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-11-23 14:00:25,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:25,644 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:25,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:00:25,644 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:00:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2075223031, now seen corresponding path program 1 times [2022-11-23 14:00:25,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607400670] [2022-11-23 14:00:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3530 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3530 trivial. 0 not checked. [2022-11-23 14:00:26,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:26,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607400670] [2022-11-23 14:00:26,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607400670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:26,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:26,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:00:26,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083382415] [2022-11-23 14:00:26,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:26,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:00:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:00:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:00:26,768 INFO L87 Difference]: Start difference. First operand 10919 states and 15228 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-23 14:00:33,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:35,247 INFO L93 Difference]: Finished difference Result 19247 states and 27206 transitions. [2022-11-23 14:00:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:00:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 461 [2022-11-23 14:00:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:35,295 INFO L225 Difference]: With dead ends: 19247 [2022-11-23 14:00:35,295 INFO L226 Difference]: Without dead ends: 19245 [2022-11-23 14:00:35,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:00:35,302 INFO L413 NwaCegarLoop]: 2193 mSDtfsCounter, 1789 mSDsluCounter, 6112 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 8305 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:35,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1790 Valid, 8305 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1415 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 14:00:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19245 states. [2022-11-23 14:00:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19245 to 19231. [2022-11-23 14:00:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19231 states, 12372 states have (on average 1.3486097639831878) internal successors, (16685), 12807 states have internal predecessors, (16685), 5207 states have call successors, (5207), 1656 states have call predecessors, (5207), 1650 states have return successors, (5289), 5121 states have call predecessors, (5289), 5207 states have call successors, (5289) [2022-11-23 14:00:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19231 states to 19231 states and 27181 transitions. [2022-11-23 14:00:37,196 INFO L78 Accepts]: Start accepts. Automaton has 19231 states and 27181 transitions. Word has length 461 [2022-11-23 14:00:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 19231 states and 27181 transitions. [2022-11-23 14:00:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-23 14:00:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 19231 states and 27181 transitions. [2022-11-23 14:00:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-23 14:00:37,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:37,205 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:00:37,205 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:00:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1755768851, now seen corresponding path program 1 times [2022-11-23 14:00:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872023061] [2022-11-23 14:00:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3569 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-23 14:00:37,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872023061] [2022-11-23 14:00:37,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872023061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:37,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:37,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:00:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319756884] [2022-11-23 14:00:37,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:37,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:00:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:00:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:00:37,701 INFO L87 Difference]: Start difference. First operand 19231 states and 27181 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2022-11-23 14:00:41,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:44,014 INFO L93 Difference]: Finished difference Result 38239 states and 54091 transitions. [2022-11-23 14:00:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:00:44,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) Word has length 476 [2022-11-23 14:00:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:44,072 INFO L225 Difference]: With dead ends: 38239 [2022-11-23 14:00:44,072 INFO L226 Difference]: Without dead ends: 19251 [2022-11-23 14:00:44,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:00:44,111 INFO L413 NwaCegarLoop]: 1817 mSDtfsCounter, 5 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:44,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3630 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 14:00:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19251 states. [2022-11-23 14:00:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19251 to 19235. [2022-11-23 14:00:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 12376 states have (on average 1.34849709114415) internal successors, (16689), 12811 states have internal predecessors, (16689), 5207 states have call successors, (5207), 1656 states have call predecessors, (5207), 1650 states have return successors, (5289), 5121 states have call predecessors, (5289), 5207 states have call successors, (5289) [2022-11-23 14:00:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 27185 transitions. [2022-11-23 14:00:46,040 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 27185 transitions. Word has length 476 [2022-11-23 14:00:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:46,040 INFO L495 AbstractCegarLoop]: Abstraction has 19235 states and 27185 transitions. [2022-11-23 14:00:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (54), 1 states have call predecessors, (54), 1 states have call successors, (54) [2022-11-23 14:00:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 27185 transitions. [2022-11-23 14:00:46,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-23 14:00:46,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:46,052 INFO L195 NwaCegarLoop]: trace histogram [34, 27, 27, 27, 27, 27, 27, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:00:46,052 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:00:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1450174438, now seen corresponding path program 1 times [2022-11-23 14:00:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9159849] [2022-11-23 14:00:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-23 14:00:46,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9159849] [2022-11-23 14:00:46,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9159849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:00:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192998285] [2022-11-23 14:00:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:46,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:46,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed6bd51c-4ec0-49fd-ac9e-2622b14019d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:00:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 4426 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:00:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-23 14:00:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2022-11-23 14:00:48,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192998285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224052149] [2022-11-23 14:00:48,546 INFO L159 IcfgInterpreter]: Started Sifa with 179 locations of interest [2022-11-23 14:00:48,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:00:48,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:00:48,555 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:00:48,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs