./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7 --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 6b81be647295ba0700d02fa1d093d31284b02ba80deefc4d677fbd988693200b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:20:22,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:20:22,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:20:22,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:20:22,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:20:22,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:20:22,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:20:23,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:20:23,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:20:23,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:20:23,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:20:23,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:20:23,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:20:23,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:20:23,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:20:23,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:20:23,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:20:23,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:20:23,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:20:23,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:20:23,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:20:23,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:20:23,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:20:23,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:20:23,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:20:23,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:20:23,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:20:23,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:20:23,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:20:23,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:20:23,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:20:23,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:20:23,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:20:23,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:20:23,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:20:23,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:20:23,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:20:23,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:20:23,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:20:23,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:20:23,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:20:23,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:20:23,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:20:23,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:20:23,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:20:23,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:20:23,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:20:23,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:20:23,131 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:20:23,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:20:23,131 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:20:23,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:20:23,132 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:20:23,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:20:23,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:20:23,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:20:23,133 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:20:23,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:20:23,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:20:23,134 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:20:23,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:20:23,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:20:23,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:20:23,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:20:23,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:20:23,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:20:23,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:20:23,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:20:23,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:20:23,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:20:23,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:20:23,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:20:23,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:20:23,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:20:23,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:20:23,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:20:23,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:20:23,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:20:23,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:20:23,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:20:23,139 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b81be647295ba0700d02fa1d093d31284b02ba80deefc4d677fbd988693200b [2021-11-25 19:20:23,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:20:23,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:20:23,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:20:23,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:20:23,469 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:20:23,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-25 19:20:23,581 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/data/d866fd4ca/f4122592e9244275b5e62b3756b35080/FLAG6b3ea427b [2021-11-25 19:20:24,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:20:24,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-25 19:20:24,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/data/d866fd4ca/f4122592e9244275b5e62b3756b35080/FLAG6b3ea427b [2021-11-25 19:20:24,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/data/d866fd4ca/f4122592e9244275b5e62b3756b35080 [2021-11-25 19:20:24,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:20:24,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:20:24,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:20:24,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:20:24,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:20:24,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:20:24" (1/1) ... [2021-11-25 19:20:24,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acffc49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:24, skipping insertion in model container [2021-11-25 19:20:24,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:20:24" (1/1) ... [2021-11-25 19:20:24,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:20:25,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:20:27,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315060,315073] [2021-11-25 19:20:27,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315229,315242] [2021-11-25 19:20:27,991 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315396,315409] [2021-11-25 19:20:27,992 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315564,315577] [2021-11-25 19:20:28,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:20:28,107 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:20:28,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315060,315073] [2021-11-25 19:20:28,536 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315229,315242] [2021-11-25 19:20:28,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315396,315409] [2021-11-25 19:20:28,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315564,315577] [2021-11-25 19:20:28,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:20:28,743 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:20:28,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28 WrapperNode [2021-11-25 19:20:28,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:20:28,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:20:28,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:20:28,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:20:28,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:28,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,125 INFO L137 Inliner]: procedures = 370, calls = 2171, calls flagged for inlining = 172, calls inlined = 152, statements flattened = 4070 [2021-11-25 19:20:29,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:20:29,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:20:29,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:20:29,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:20:29,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:20:29,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:20:29,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:20:29,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:20:29,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (1/1) ... [2021-11-25 19:20:29,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:20:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:20:29,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:20:29,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:20:29,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_page_lock_of_ei_device [2021-11-25 19:20:29,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_page_lock_of_ei_device [2021-11-25 19:20:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:20:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:20:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_detach [2021-11-25 19:20:29,584 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_detach [2021-11-25 19:20:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 19:20:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 19:20:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 19:20:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 19:20:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 19:20:29,586 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 19:20:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure AX88190_init [2021-11-25 19:20:29,586 INFO L138 BoogieDeclarations]: Found implementation of procedure AX88190_init [2021-11-25 19:20:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-25 19:20:29,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-25 19:20:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:20:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:20:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2021-11-25 19:20:29,587 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2021-11-25 19:20:29,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 19:20:29,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 19:20:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_70 [2021-11-25 19:20:29,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_70 [2021-11-25 19:20:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 19:20:29,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 19:20:29,589 INFO L130 BoogieDeclarations]: Found specification of procedure ei_receive [2021-11-25 19:20:29,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_receive [2021-11-25 19:20:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:20:29,590 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:20:29,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2021-11-25 19:20:29,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2021-11-25 19:20:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 19:20:29,591 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 19:20:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_release [2021-11-25 19:20:29,591 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_release [2021-11-25 19:20:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_write_config_byte [2021-11-25 19:20:29,592 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_write_config_byte [2021-11-25 19:20:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure insw [2021-11-25 19:20:29,592 INFO L138 BoogieDeclarations]: Found implementation of procedure insw [2021-11-25 19:20:29,592 INFO L130 BoogieDeclarations]: Found specification of procedure PRIV [2021-11-25 19:20:29,593 INFO L138 BoogieDeclarations]: Found implementation of procedure PRIV [2021-11-25 19:20:29,593 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 19:20:29,594 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 19:20:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:20:29,595 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 19:20:29,596 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 19:20:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:20:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 19:20:29,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 19:20:29,596 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-25 19:20:29,597 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-25 19:20:29,597 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-25 19:20:29,597 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-25 19:20:29,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 19:20:29,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 19:20:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure NS8390_trigger_send [2021-11-25 19:20:29,599 INFO L138 BoogieDeclarations]: Found implementation of procedure NS8390_trigger_send [2021-11-25 19:20:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure ei_tx_intr [2021-11-25 19:20:29,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_tx_intr [2021-11-25 19:20:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:20:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:20:29,600 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 19:20:29,600 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 19:20:29,601 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-25 19:20:29,601 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-25 19:20:29,601 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 19:20:29,602 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 19:20:29,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 19:20:29,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 19:20:29,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:20:29,603 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-25 19:20:29,605 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-25 19:20:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:20:29,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 19:20:29,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 19:20:29,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:20:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 19:20:29,607 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 19:20:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure ei_irq_wrapper [2021-11-25 19:20:29,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_irq_wrapper [2021-11-25 19:20:29,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 19:20:29,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 19:20:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 19:20:29,609 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 19:20:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 19:20:29,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 19:20:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:20:29,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:20:29,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:20:29,611 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_reset_8390 [2021-11-25 19:20:29,611 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_reset_8390 [2021-11-25 19:20:29,611 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_tx_timeout [2021-11-25 19:20:29,612 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_tx_timeout [2021-11-25 19:20:29,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 19:20:29,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 19:20:29,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:20:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2021-11-25 19:20:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2021-11-25 19:20:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 19:20:29,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 19:20:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_cs_driver_exit [2021-11-25 19:20:29,614 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_cs_driver_exit [2021-11-25 19:20:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:20:29,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 19:20:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 19:20:29,619 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 19:20:29,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 19:20:29,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:20:29,620 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:20:29,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:20:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 19:20:29,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 19:20:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 19:20:29,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 19:20:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2021-11-25 19:20:29,630 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2021-11-25 19:20:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 19:20:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 19:20:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure do_set_multicast_list [2021-11-25 19:20:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure do_set_multicast_list [2021-11-25 19:20:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:20:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 19:20:29,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 19:20:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-25 19:20:29,632 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-25 19:20:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:20:29,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:20:30,377 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:20:30,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:20:30,650 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 19:20:37,050 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 19:20:37,184 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:20:37,963 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:20:37,963 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:20:37,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:20:37 BoogieIcfgContainer [2021-11-25 19:20:37,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:20:37,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:20:37,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:20:37,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:20:37,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:20:24" (1/3) ... [2021-11-25 19:20:37,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e4bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:20:37, skipping insertion in model container [2021-11-25 19:20:37,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:20:28" (2/3) ... [2021-11-25 19:20:37,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e4bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:20:37, skipping insertion in model container [2021-11-25 19:20:37,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:20:37" (3/3) ... [2021-11-25 19:20:37,980 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-25 19:20:37,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:20:37,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 19:20:38,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:20:38,074 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:20:38,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 19:20:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 953 states, 528 states have (on average 1.303030303030303) internal successors, (688), 552 states have internal predecessors, (688), 368 states have call successors, (368), 56 states have call predecessors, (368), 55 states have return successors, (362), 354 states have call predecessors, (362), 362 states have call successors, (362) [2021-11-25 19:20:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:20:38,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:38,138 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:20:38,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:20:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash 263466716, now seen corresponding path program 1 times [2021-11-25 19:20:38,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:20:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61670989] [2021-11-25 19:20:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:38,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:20:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:20:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:20:38,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:20:38,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61670989] [2021-11-25 19:20:38,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61670989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:38,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:38,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:20:38,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603136440] [2021-11-25 19:20:38,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:38,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:20:38,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:20:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:20:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:38,947 INFO L87 Difference]: Start difference. First operand has 953 states, 528 states have (on average 1.303030303030303) internal successors, (688), 552 states have internal predecessors, (688), 368 states have call successors, (368), 56 states have call predecessors, (368), 55 states have return successors, (362), 354 states have call predecessors, (362), 362 states have call successors, (362) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:20:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:20:42,049 INFO L93 Difference]: Finished difference Result 2749 states and 4166 transitions. [2021-11-25 19:20:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:20:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2021-11-25 19:20:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:20:42,100 INFO L225 Difference]: With dead ends: 2749 [2021-11-25 19:20:42,100 INFO L226 Difference]: Without dead ends: 1801 [2021-11-25 19:20:42,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:42,132 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 1301 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:20:42,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 2732 Invalid, 397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:20:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-11-25 19:20:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1797. [2021-11-25 19:20:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1005 states have (on average 1.2935323383084578) internal successors, (1300), 1050 states have internal predecessors, (1300), 683 states have call successors, (683), 107 states have call predecessors, (683), 106 states have return successors, (679), 663 states have call predecessors, (679), 679 states have call successors, (679) [2021-11-25 19:20:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2662 transitions. [2021-11-25 19:20:42,482 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2662 transitions. Word has length 91 [2021-11-25 19:20:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:20:42,483 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 2662 transitions. [2021-11-25 19:20:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:20:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2662 transitions. [2021-11-25 19:20:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:20:42,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:42,504 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:20:42,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:20:42,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:20:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -228041881, now seen corresponding path program 1 times [2021-11-25 19:20:42,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:20:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652194932] [2021-11-25 19:20:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:42,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:20:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:20:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:20:42,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:20:42,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652194932] [2021-11-25 19:20:42,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652194932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:42,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:42,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:20:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625619465] [2021-11-25 19:20:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:42,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:20:42,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:20:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:20:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:42,912 INFO L87 Difference]: Start difference. First operand 1797 states and 2662 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:20:45,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:20:46,362 INFO L93 Difference]: Finished difference Result 5049 states and 7452 transitions. [2021-11-25 19:20:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:20:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2021-11-25 19:20:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:20:46,396 INFO L225 Difference]: With dead ends: 5049 [2021-11-25 19:20:46,396 INFO L226 Difference]: Without dead ends: 3267 [2021-11-25 19:20:46,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:46,408 INFO L933 BasicCegarLoop]: 1542 mSDtfsCounter, 1109 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:20:46,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 2718 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:20:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-11-25 19:20:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3230. [2021-11-25 19:20:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 1802 states have (on average 1.2846836847946725) internal successors, (2315), 1886 states have internal predecessors, (2315), 1220 states have call successors, (1220), 206 states have call predecessors, (1220), 205 states have return successors, (1222), 1183 states have call predecessors, (1222), 1216 states have call successors, (1222) [2021-11-25 19:20:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4757 transitions. [2021-11-25 19:20:46,698 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4757 transitions. Word has length 99 [2021-11-25 19:20:46,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:20:46,699 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 4757 transitions. [2021-11-25 19:20:46,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:20:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4757 transitions. [2021-11-25 19:20:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 19:20:46,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:46,709 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 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] [2021-11-25 19:20:46,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:20:46,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:20:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash -864064538, now seen corresponding path program 1 times [2021-11-25 19:20:46,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:20:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48325529] [2021-11-25 19:20:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:46,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:20:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:20:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 19:20:47,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:20:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48325529] [2021-11-25 19:20:47,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48325529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:47,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:47,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:20:47,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85276688] [2021-11-25 19:20:47,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:47,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:20:47,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:20:47,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:20:47,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:47,034 INFO L87 Difference]: Start difference. First operand 3230 states and 4757 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:20:50,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:20:50,699 INFO L93 Difference]: Finished difference Result 8902 states and 13055 transitions. [2021-11-25 19:20:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:20:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 103 [2021-11-25 19:20:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:20:50,753 INFO L225 Difference]: With dead ends: 8902 [2021-11-25 19:20:50,754 INFO L226 Difference]: Without dead ends: 5687 [2021-11-25 19:20:50,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:50,773 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 1114 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:20:50,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 2684 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 375 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 19:20:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2021-11-25 19:20:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5654. [2021-11-25 19:20:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 3168 states have (on average 1.2799873737373737) internal successors, (4055), 3306 states have internal predecessors, (4055), 2102 states have call successors, (2102), 386 states have call predecessors, (2102), 381 states have return successors, (2110), 2025 states have call predecessors, (2110), 2098 states have call successors, (2110) [2021-11-25 19:20:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 8267 transitions. [2021-11-25 19:20:51,210 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 8267 transitions. Word has length 103 [2021-11-25 19:20:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:20:51,211 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 8267 transitions. [2021-11-25 19:20:51,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 19:20:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 8267 transitions. [2021-11-25 19:20:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-25 19:20:51,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:51,283 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 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] [2021-11-25 19:20:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:20:51,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:20:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1590383950, now seen corresponding path program 1 times [2021-11-25 19:20:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:20:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716899934] [2021-11-25 19:20:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:51,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:20:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:20:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-25 19:20:51,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:20:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716899934] [2021-11-25 19:20:51,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716899934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:51,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:51,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:20:51,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911960320] [2021-11-25 19:20:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:51,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:20:51,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:20:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:20:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:51,536 INFO L87 Difference]: Start difference. First operand 5654 states and 8267 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 19:20:53,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:20:54,197 INFO L93 Difference]: Finished difference Result 10047 states and 14675 transitions. [2021-11-25 19:20:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:20:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 118 [2021-11-25 19:20:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:20:54,245 INFO L225 Difference]: With dead ends: 10047 [2021-11-25 19:20:54,245 INFO L226 Difference]: Without dead ends: 4408 [2021-11-25 19:20:54,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:20:54,286 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 1260 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:20:54,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 2276 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:20:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-11-25 19:20:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4369. [2021-11-25 19:20:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 2504 states have (on average 1.273961661341853) internal successors, (3190), 2648 states have internal predecessors, (3190), 1548 states have call successors, (1548), 354 states have call predecessors, (1548), 314 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:20:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6318 transitions. [2021-11-25 19:20:54,726 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6318 transitions. Word has length 118 [2021-11-25 19:20:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:20:54,726 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 6318 transitions. [2021-11-25 19:20:54,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 19:20:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6318 transitions. [2021-11-25 19:20:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 19:20:54,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:54,730 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:20:54,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:20:54,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:20:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 925306983, now seen corresponding path program 1 times [2021-11-25 19:20:54,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:20:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589835753] [2021-11-25 19:20:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:54,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:20:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:20:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-25 19:20:55,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:20:55,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589835753] [2021-11-25 19:20:55,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589835753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:20:55,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:20:55,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:20:55,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171224144] [2021-11-25 19:20:55,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:20:55,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:20:55,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:20:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:20:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:20:55,150 INFO L87 Difference]: Start difference. First operand 4369 states and 6318 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 19:20:57,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:59,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:00,224 INFO L93 Difference]: Finished difference Result 4375 states and 6323 transitions. [2021-11-25 19:21:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-25 19:21:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:00,268 INFO L225 Difference]: With dead ends: 4375 [2021-11-25 19:21:00,268 INFO L226 Difference]: Without dead ends: 4373 [2021-11-25 19:21:00,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:00,273 INFO L933 BasicCegarLoop]: 1198 mSDtfsCounter, 1344 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:00,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 3581 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 19:21:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-11-25 19:21:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 4373. [2021-11-25 19:21:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 2507 states have (on average 1.2736338252891903) internal successors, (3193), 2651 states have internal predecessors, (3193), 1548 states have call successors, (1548), 355 states have call predecessors, (1548), 315 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 6321 transitions. [2021-11-25 19:21:00,650 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 6321 transitions. Word has length 133 [2021-11-25 19:21:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:00,652 INFO L470 AbstractCegarLoop]: Abstraction has 4373 states and 6321 transitions. [2021-11-25 19:21:00,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 19:21:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 6321 transitions. [2021-11-25 19:21:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 19:21:00,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:00,661 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:00,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:21:00,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1451358043, now seen corresponding path program 1 times [2021-11-25 19:21:00,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:00,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062619071] [2021-11-25 19:21:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-25 19:21:00,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:00,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062619071] [2021-11-25 19:21:00,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062619071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:00,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:00,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673543819] [2021-11-25 19:21:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:00,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:00,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:00,993 INFO L87 Difference]: Start difference. First operand 4373 states and 6321 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 19:21:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:03,967 INFO L93 Difference]: Finished difference Result 4379 states and 6326 transitions. [2021-11-25 19:21:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 138 [2021-11-25 19:21:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:04,008 INFO L225 Difference]: With dead ends: 4379 [2021-11-25 19:21:04,008 INFO L226 Difference]: Without dead ends: 4377 [2021-11-25 19:21:04,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:04,013 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:04,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:21:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-11-25 19:21:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 4377. [2021-11-25 19:21:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 2510 states have (on average 1.2733067729083665) internal successors, (3196), 2654 states have internal predecessors, (3196), 1548 states have call successors, (1548), 356 states have call predecessors, (1548), 316 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 6324 transitions. [2021-11-25 19:21:04,379 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 6324 transitions. Word has length 138 [2021-11-25 19:21:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:04,380 INFO L470 AbstractCegarLoop]: Abstraction has 4377 states and 6324 transitions. [2021-11-25 19:21:04,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 19:21:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 6324 transitions. [2021-11-25 19:21:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 19:21:04,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:04,386 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:04,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:21:04,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash -726774785, now seen corresponding path program 1 times [2021-11-25 19:21:04,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:04,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384605281] [2021-11-25 19:21:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:04,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-25 19:21:04,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:04,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384605281] [2021-11-25 19:21:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384605281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:04,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:04,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:04,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915678601] [2021-11-25 19:21:04,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:04,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:04,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:04,687 INFO L87 Difference]: Start difference. First operand 4377 states and 6324 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:21:08,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:08,869 INFO L93 Difference]: Finished difference Result 4383 states and 6329 transitions. [2021-11-25 19:21:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2021-11-25 19:21:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:08,920 INFO L225 Difference]: With dead ends: 4383 [2021-11-25 19:21:08,920 INFO L226 Difference]: Without dead ends: 4381 [2021-11-25 19:21:08,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:08,929 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:08,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 19:21:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-11-25 19:21:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 4381. [2021-11-25 19:21:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 2513 states have (on average 1.2729805013927578) internal successors, (3199), 2657 states have internal predecessors, (3199), 1548 states have call successors, (1548), 357 states have call predecessors, (1548), 317 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 6327 transitions. [2021-11-25 19:21:09,287 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 6327 transitions. Word has length 150 [2021-11-25 19:21:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:09,289 INFO L470 AbstractCegarLoop]: Abstraction has 4381 states and 6327 transitions. [2021-11-25 19:21:09,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 19:21:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 6327 transitions. [2021-11-25 19:21:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 19:21:09,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:09,293 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 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] [2021-11-25 19:21:09,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:21:09,293 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2058831451, now seen corresponding path program 1 times [2021-11-25 19:21:09,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:09,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792246955] [2021-11-25 19:21:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:09,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-25 19:21:09,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792246955] [2021-11-25 19:21:09,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792246955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:09,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:09,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:09,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979204368] [2021-11-25 19:21:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:09,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:09,605 INFO L87 Difference]: Start difference. First operand 4381 states and 6327 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:21:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:12,965 INFO L93 Difference]: Finished difference Result 4387 states and 6332 transitions. [2021-11-25 19:21:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:13,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 148 [2021-11-25 19:21:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:13,029 INFO L225 Difference]: With dead ends: 4387 [2021-11-25 19:21:13,029 INFO L226 Difference]: Without dead ends: 4385 [2021-11-25 19:21:13,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:13,032 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:13,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:21:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-11-25 19:21:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 4385. [2021-11-25 19:21:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 2516 states have (on average 1.2726550079491257) internal successors, (3202), 2660 states have internal predecessors, (3202), 1548 states have call successors, (1548), 358 states have call predecessors, (1548), 318 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 6330 transitions. [2021-11-25 19:21:13,408 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 6330 transitions. Word has length 148 [2021-11-25 19:21:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:13,411 INFO L470 AbstractCegarLoop]: Abstraction has 4385 states and 6330 transitions. [2021-11-25 19:21:13,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 19:21:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 6330 transitions. [2021-11-25 19:21:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-25 19:21:13,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:13,415 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:13,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:21:13,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash -719209113, now seen corresponding path program 1 times [2021-11-25 19:21:13,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:13,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256708323] [2021-11-25 19:21:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:13,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-25 19:21:13,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256708323] [2021-11-25 19:21:13,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256708323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:13,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:13,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:13,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436412975] [2021-11-25 19:21:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:13,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:13,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:13,714 INFO L87 Difference]: Start difference. First operand 4385 states and 6330 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:21:16,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:18,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:19,874 INFO L93 Difference]: Finished difference Result 4391 states and 6335 transitions. [2021-11-25 19:21:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 153 [2021-11-25 19:21:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:19,900 INFO L225 Difference]: With dead ends: 4391 [2021-11-25 19:21:19,900 INFO L226 Difference]: Without dead ends: 4389 [2021-11-25 19:21:19,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:19,905 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:19,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 19:21:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-11-25 19:21:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 4389. [2021-11-25 19:21:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 2519 states have (on average 1.2723302897975388) internal successors, (3205), 2663 states have internal predecessors, (3205), 1548 states have call successors, (1548), 359 states have call predecessors, (1548), 319 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6333 transitions. [2021-11-25 19:21:20,278 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6333 transitions. Word has length 153 [2021-11-25 19:21:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:20,278 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 6333 transitions. [2021-11-25 19:21:20,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 19:21:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6333 transitions. [2021-11-25 19:21:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-25 19:21:20,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:20,283 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:20,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:21:20,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 641714485, now seen corresponding path program 1 times [2021-11-25 19:21:20,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:20,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856172543] [2021-11-25 19:21:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:20,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-25 19:21:20,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856172543] [2021-11-25 19:21:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856172543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:20,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:20,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:20,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590125787] [2021-11-25 19:21:20,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:20,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:20,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:20,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:20,600 INFO L87 Difference]: Start difference. First operand 4389 states and 6333 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:21:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:23,913 INFO L93 Difference]: Finished difference Result 4395 states and 6338 transitions. [2021-11-25 19:21:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 166 [2021-11-25 19:21:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:23,940 INFO L225 Difference]: With dead ends: 4395 [2021-11-25 19:21:23,940 INFO L226 Difference]: Without dead ends: 4393 [2021-11-25 19:21:23,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:23,944 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:23,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:21:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-11-25 19:21:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4393. [2021-11-25 19:21:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 2522 states have (on average 1.2720063441712925) internal successors, (3208), 2666 states have internal predecessors, (3208), 1548 states have call successors, (1548), 360 states have call predecessors, (1548), 320 states have return successors, (1580), 1400 states have call predecessors, (1580), 1544 states have call successors, (1580) [2021-11-25 19:21:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 6336 transitions. [2021-11-25 19:21:24,360 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 6336 transitions. Word has length 166 [2021-11-25 19:21:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:24,361 INFO L470 AbstractCegarLoop]: Abstraction has 4393 states and 6336 transitions. [2021-11-25 19:21:24,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:21:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 6336 transitions. [2021-11-25 19:21:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-25 19:21:24,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:24,366 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 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] [2021-11-25 19:21:24,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:21:24,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash -49249180, now seen corresponding path program 1 times [2021-11-25 19:21:24,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064068197] [2021-11-25 19:21:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:24,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-25 19:21:24,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064068197] [2021-11-25 19:21:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064068197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:24,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:24,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:21:24,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258548186] [2021-11-25 19:21:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:24,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:21:24,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:21:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:21:24,604 INFO L87 Difference]: Start difference. First operand 4393 states and 6336 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 19:21:27,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:28,499 INFO L93 Difference]: Finished difference Result 9679 states and 13971 transitions. [2021-11-25 19:21:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:21:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 165 [2021-11-25 19:21:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:28,540 INFO L225 Difference]: With dead ends: 9679 [2021-11-25 19:21:28,541 INFO L226 Difference]: Without dead ends: 5355 [2021-11-25 19:21:28,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:21:28,569 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 466 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:28,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 2767 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 19:21:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2021-11-25 19:21:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 5300. [2021-11-25 19:21:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 3067 states have (on average 1.2729051190088034) internal successors, (3904), 3257 states have internal predecessors, (3904), 1832 states have call successors, (1832), 471 states have call predecessors, (1832), 398 states have return successors, (1876), 1605 states have call predecessors, (1876), 1828 states have call successors, (1876) [2021-11-25 19:21:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 7612 transitions. [2021-11-25 19:21:29,037 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 7612 transitions. Word has length 165 [2021-11-25 19:21:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:29,038 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 7612 transitions. [2021-11-25 19:21:29,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 19:21:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 7612 transitions. [2021-11-25 19:21:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-25 19:21:29,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:29,042 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:29,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:21:29,043 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:29,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -986704041, now seen corresponding path program 1 times [2021-11-25 19:21:29,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567644692] [2021-11-25 19:21:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:29,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 19:21:29,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567644692] [2021-11-25 19:21:29,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567644692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:29,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:29,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:29,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179194857] [2021-11-25 19:21:29,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:29,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:29,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:29,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:29,291 INFO L87 Difference]: Start difference. First operand 5300 states and 7612 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 19:21:31,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:32,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:33,565 INFO L93 Difference]: Finished difference Result 5306 states and 7617 transitions. [2021-11-25 19:21:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:33,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 171 [2021-11-25 19:21:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:33,594 INFO L225 Difference]: With dead ends: 5306 [2021-11-25 19:21:33,594 INFO L226 Difference]: Without dead ends: 5304 [2021-11-25 19:21:33,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:33,599 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 19:21:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-11-25 19:21:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 5304. [2021-11-25 19:21:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5304 states, 3070 states have (on average 1.2726384364820846) internal successors, (3907), 3260 states have internal predecessors, (3907), 1832 states have call successors, (1832), 472 states have call predecessors, (1832), 399 states have return successors, (1876), 1605 states have call predecessors, (1876), 1828 states have call successors, (1876) [2021-11-25 19:21:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5304 states to 5304 states and 7615 transitions. [2021-11-25 19:21:34,078 INFO L78 Accepts]: Start accepts. Automaton has 5304 states and 7615 transitions. Word has length 171 [2021-11-25 19:21:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 5304 states and 7615 transitions. [2021-11-25 19:21:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 19:21:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5304 states and 7615 transitions. [2021-11-25 19:21:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 19:21:34,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:34,085 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2021-11-25 19:21:34,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:21:34,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -579524211, now seen corresponding path program 1 times [2021-11-25 19:21:34,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:34,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670080483] [2021-11-25 19:21:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:34,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-11-25 19:21:34,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670080483] [2021-11-25 19:21:34,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670080483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:34,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:34,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:34,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24797115] [2021-11-25 19:21:34,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:34,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:34,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:34,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:34,343 INFO L87 Difference]: Start difference. First operand 5304 states and 7615 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:21:37,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:37,591 INFO L93 Difference]: Finished difference Result 5321 states and 7631 transitions. [2021-11-25 19:21:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 175 [2021-11-25 19:21:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:37,622 INFO L225 Difference]: With dead ends: 5321 [2021-11-25 19:21:37,622 INFO L226 Difference]: Without dead ends: 5319 [2021-11-25 19:21:37,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:37,626 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1332 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:37,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 3611 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:21:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-11-25 19:21:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5319. [2021-11-25 19:21:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 3079 states have (on average 1.272166287755765) internal successors, (3917), 3270 states have internal predecessors, (3917), 1834 states have call successors, (1834), 476 states have call predecessors, (1834), 403 states have return successors, (1878), 1607 states have call predecessors, (1878), 1830 states have call successors, (1878) [2021-11-25 19:21:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 7629 transitions. [2021-11-25 19:21:38,112 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 7629 transitions. Word has length 175 [2021-11-25 19:21:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 5319 states and 7629 transitions. [2021-11-25 19:21:38,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:21:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 7629 transitions. [2021-11-25 19:21:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 19:21:38,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:38,117 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:38,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:21:38,117 INFO L402 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)] === [2021-11-25 19:21:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash -585979289, now seen corresponding path program 1 times [2021-11-25 19:21:38,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362357413] [2021-11-25 19:21:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:38,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-11-25 19:21:38,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:38,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362357413] [2021-11-25 19:21:38,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362357413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:38,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:38,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:38,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060675388] [2021-11-25 19:21:38,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:38,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:38,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:38,369 INFO L87 Difference]: Start difference. First operand 5319 states and 7629 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:21:42,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:43,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:43,866 INFO L93 Difference]: Finished difference Result 6176 states and 8726 transitions. [2021-11-25 19:21:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:43,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 173 [2021-11-25 19:21:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:43,898 INFO L225 Difference]: With dead ends: 6176 [2021-11-25 19:21:43,899 INFO L226 Difference]: Without dead ends: 6174 [2021-11-25 19:21:43,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:43,903 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 931 mSDsluCounter, 3816 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 4720 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:43,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 4720 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 19:21:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2021-11-25 19:21:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 6132. [2021-11-25 19:21:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 3479 states have (on average 1.2558206381144006) internal successors, (4369), 3684 states have internal predecessors, (4369), 2128 states have call successors, (2128), 631 states have call predecessors, (2128), 522 states have return successors, (2178), 1859 states have call predecessors, (2178), 2124 states have call successors, (2178) [2021-11-25 19:21:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 8675 transitions. [2021-11-25 19:21:44,409 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 8675 transitions. Word has length 173 [2021-11-25 19:21:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:44,410 INFO L470 AbstractCegarLoop]: Abstraction has 6132 states and 8675 transitions. [2021-11-25 19:21:44,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:21:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 8675 transitions. [2021-11-25 19:21:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 19:21:44,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:44,415 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 7, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:21:44,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 471233333, now seen corresponding path program 1 times [2021-11-25 19:21:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661368870] [2021-11-25 19:21:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:44,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-25 19:21:44,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661368870] [2021-11-25 19:21:44,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661368870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:44,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:44,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:44,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099451930] [2021-11-25 19:21:44,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:44,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:44,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:44,728 INFO L87 Difference]: Start difference. First operand 6132 states and 8675 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 19:21:47,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:48,035 INFO L93 Difference]: Finished difference Result 6138 states and 8680 transitions. [2021-11-25 19:21:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 186 [2021-11-25 19:21:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:48,067 INFO L225 Difference]: With dead ends: 6138 [2021-11-25 19:21:48,067 INFO L226 Difference]: Without dead ends: 6136 [2021-11-25 19:21:48,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:48,072 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1332 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:48,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 3611 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:21:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-11-25 19:21:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 6136. [2021-11-25 19:21:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 3482 states have (on average 1.2556002297530156) internal successors, (4372), 3687 states have internal predecessors, (4372), 2128 states have call successors, (2128), 632 states have call predecessors, (2128), 523 states have return successors, (2178), 1859 states have call predecessors, (2178), 2124 states have call successors, (2178) [2021-11-25 19:21:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8678 transitions. [2021-11-25 19:21:48,597 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8678 transitions. Word has length 186 [2021-11-25 19:21:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:48,598 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 8678 transitions. [2021-11-25 19:21:48,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 19:21:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8678 transitions. [2021-11-25 19:21:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 19:21:48,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:48,603 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:48,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:21:48,603 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058407, now seen corresponding path program 1 times [2021-11-25 19:21:48,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:48,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207836135] [2021-11-25 19:21:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:48,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-11-25 19:21:48,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207836135] [2021-11-25 19:21:48,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207836135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:48,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:48,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:48,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045276434] [2021-11-25 19:21:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:48,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:48,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:48,866 INFO L87 Difference]: Start difference. First operand 6136 states and 8678 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:21:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:52,490 INFO L93 Difference]: Finished difference Result 6142 states and 8683 transitions. [2021-11-25 19:21:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2021-11-25 19:21:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:52,520 INFO L225 Difference]: With dead ends: 6142 [2021-11-25 19:21:52,521 INFO L226 Difference]: Without dead ends: 6138 [2021-11-25 19:21:52,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:52,526 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:52,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:21:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2021-11-25 19:21:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 6138. [2021-11-25 19:21:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 3484 states have (on average 1.255166475315729) internal successors, (4373), 3688 states have internal predecessors, (4373), 2128 states have call successors, (2128), 633 states have call predecessors, (2128), 523 states have return successors, (2178), 1859 states have call predecessors, (2178), 2124 states have call successors, (2178) [2021-11-25 19:21:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 8679 transitions. [2021-11-25 19:21:53,111 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 8679 transitions. Word has length 183 [2021-11-25 19:21:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:53,112 INFO L470 AbstractCegarLoop]: Abstraction has 6138 states and 8679 transitions. [2021-11-25 19:21:53,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 19:21:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 8679 transitions. [2021-11-25 19:21:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 19:21:53,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:53,117 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 7, 7, 7, 7, 7, 7, 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] [2021-11-25 19:21:53,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:21:53,117 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:21:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1107847283, now seen corresponding path program 1 times [2021-11-25 19:21:53,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047218670] [2021-11-25 19:21:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:53,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-25 19:21:53,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047218670] [2021-11-25 19:21:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047218670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:53,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:53,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:53,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600113413] [2021-11-25 19:21:53,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:53,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:53,334 INFO L87 Difference]: Start difference. First operand 6138 states and 8679 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 19:21:55,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:57,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:21:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:21:58,694 INFO L93 Difference]: Finished difference Result 6138 states and 8679 transitions. [2021-11-25 19:21:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:21:58,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 195 [2021-11-25 19:21:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:21:58,719 INFO L225 Difference]: With dead ends: 6138 [2021-11-25 19:21:58,719 INFO L226 Difference]: Without dead ends: 5979 [2021-11-25 19:21:58,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:21:58,726 INFO L933 BasicCegarLoop]: 1199 mSDtfsCounter, 1334 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:21:58,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 3581 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 19:21:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-11-25 19:21:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5979. [2021-11-25 19:21:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5979 states, 3430 states have (on average 1.2486880466472303) internal successors, (4283), 3598 states have internal predecessors, (4283), 2039 states have call successors, (2039), 606 states have call predecessors, (2039), 508 states have return successors, (2093), 1817 states have call predecessors, (2093), 2039 states have call successors, (2093) [2021-11-25 19:21:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 8415 transitions. [2021-11-25 19:21:59,290 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 8415 transitions. Word has length 195 [2021-11-25 19:21:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:21:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 5979 states and 8415 transitions. [2021-11-25 19:21:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 19:21:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 8415 transitions. [2021-11-25 19:21:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-25 19:21:59,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:21:59,296 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 8, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:21:59,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:21:59,297 INFO L402 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)] === [2021-11-25 19:21:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:21:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1050896028, now seen corresponding path program 1 times [2021-11-25 19:21:59,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:21:59,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043748406] [2021-11-25 19:21:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:21:59,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:21:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:21:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-25 19:21:59,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:21:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043748406] [2021-11-25 19:21:59,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043748406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:21:59,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:21:59,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:21:59,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844476312] [2021-11-25 19:21:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:21:59,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:21:59,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:21:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:21:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:21:59,599 INFO L87 Difference]: Start difference. First operand 5979 states and 8415 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 19:22:01,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:22:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:04,599 INFO L93 Difference]: Finished difference Result 5992 states and 8426 transitions. [2021-11-25 19:22:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:22:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 208 [2021-11-25 19:22:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:04,621 INFO L225 Difference]: With dead ends: 5992 [2021-11-25 19:22:04,622 INFO L226 Difference]: Without dead ends: 5990 [2021-11-25 19:22:04,624 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:22:04,625 INFO L933 BasicCegarLoop]: 1321 mSDtfsCounter, 856 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 4581 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:04,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 4581 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 19:22:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-11-25 19:22:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5979. [2021-11-25 19:22:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5979 states, 3430 states have (on average 1.2454810495626822) internal successors, (4272), 3598 states have internal predecessors, (4272), 2039 states have call successors, (2039), 606 states have call predecessors, (2039), 508 states have return successors, (2093), 1817 states have call predecessors, (2093), 2039 states have call successors, (2093) [2021-11-25 19:22:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 8404 transitions. [2021-11-25 19:22:05,224 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 8404 transitions. Word has length 208 [2021-11-25 19:22:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:05,225 INFO L470 AbstractCegarLoop]: Abstraction has 5979 states and 8404 transitions. [2021-11-25 19:22:05,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 19:22:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 8404 transitions. [2021-11-25 19:22:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-25 19:22:05,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:05,242 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 7, 7, 7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:05,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 19:22:05,242 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:22:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1364524109, now seen corresponding path program 1 times [2021-11-25 19:22:05,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:05,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918517096] [2021-11-25 19:22:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:05,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2725 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2021-11-25 19:22:05,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:05,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918517096] [2021-11-25 19:22:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918517096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:05,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:22:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861505409] [2021-11-25 19:22:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:05,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:05,683 INFO L87 Difference]: Start difference. First operand 5979 states and 8404 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-25 19:22:07,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:22:08,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:22:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:09,090 INFO L93 Difference]: Finished difference Result 11929 states and 16853 transitions. [2021-11-25 19:22:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 552 [2021-11-25 19:22:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:09,124 INFO L225 Difference]: With dead ends: 11929 [2021-11-25 19:22:09,124 INFO L226 Difference]: Without dead ends: 6019 [2021-11-25 19:22:09,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:09,156 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 2 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:09,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2305 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:22:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-11-25 19:22:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 5987. [2021-11-25 19:22:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5987 states, 3438 states have (on average 1.244909831297266) internal successors, (4280), 3606 states have internal predecessors, (4280), 2039 states have call successors, (2039), 606 states have call predecessors, (2039), 508 states have return successors, (2093), 1817 states have call predecessors, (2093), 2039 states have call successors, (2093) [2021-11-25 19:22:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 8412 transitions. [2021-11-25 19:22:09,724 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 8412 transitions. Word has length 552 [2021-11-25 19:22:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 5987 states and 8412 transitions. [2021-11-25 19:22:09,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-25 19:22:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 8412 transitions. [2021-11-25 19:22:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-25 19:22:09,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:09,749 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 13, 7, 7, 7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:09,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 19:22:09,749 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 19:22:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1200348678, now seen corresponding path program 1 times [2021-11-25 19:22:09,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:09,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510865861] [2021-11-25 19:22:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:09,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2021-11-25 19:22:10,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510865861] [2021-11-25 19:22:10,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510865861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494941944] [2021-11-25 19:22:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:10,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:10,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:10,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9453a5-25b9-4219-aa18-242b7914bc74/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:22:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 6468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:22:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 588 proven. 1 refuted. 0 times theorem prover too weak. 2637 trivial. 0 not checked. [2021-11-25 19:22:12,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2021-11-25 19:22:14,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494941944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:14,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870228752] [2021-11-25 19:22:14,885 INFO L159 IcfgInterpreter]: Started Sifa with 201 locations of interest [2021-11-25 19:22:14,886 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:22:14,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:22:14,903 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:22:14,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:22:22,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:22:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-11-25 19:22:24,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21