./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P --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 0.2.1-dev-53f42b1 [2021-11-21 01:01:41,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:01:41,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:01:41,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:01:41,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:01:41,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:01:41,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:01:42,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:01:42,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:01:42,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:01:42,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:01:42,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:01:42,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:01:42,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:01:42,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:01:42,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:01:42,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:01:42,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:01:42,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:01:42,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:01:42,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:01:42,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:01:42,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:01:42,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:01:42,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:01:42,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:01:42,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:01:42,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:01:42,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:01:42,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:01:42,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:01:42,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:01:42,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:01:42,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:01:42,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:01:42,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:01:42,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:01:42,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:01:42,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:01:42,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:01:42,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:01:42,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:01:42,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:01:42,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:01:42,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:01:42,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:01:42,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:01:42,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:01:42,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:01:42,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:01:42,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:01:42,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:01:42,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:01:42,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:01:42,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:01:42,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:01:42,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:01:42,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:01:42,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:01:42,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:01:42,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:01:42,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:01:42,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:01:42,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:01:42,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:01:42,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:01:42,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:01:42,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:01:42,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:01:42,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:01:42,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:01:42,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:01:42,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:01:42,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:01:42,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:01:42,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:01:42,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:01:42,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:01:42,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:01:42,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:01:42,107 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b81be647295ba0700d02fa1d093d31284b02ba80deefc4d677fbd988693200b [2021-11-21 01:01:42,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:01:42,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:01:42,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:01:42,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:01:42,440 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:01:42,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-21 01:01:42,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/data/743736aee/4ad1729ca4004ff8806175338c8a82bd/FLAG24290756b [2021-11-21 01:01:43,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:01:43,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-21 01:01:43,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/data/743736aee/4ad1729ca4004ff8806175338c8a82bd/FLAG24290756b [2021-11-21 01:01:43,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/data/743736aee/4ad1729ca4004ff8806175338c8a82bd [2021-11-21 01:01:43,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:01:43,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:01:43,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:01:43,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:01:43,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:01:43,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:01:43" (1/1) ... [2021-11-21 01:01:43,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5af1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:43, skipping insertion in model container [2021-11-21 01:01:43,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:01:43" (1/1) ... [2021-11-21 01:01:43,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:01:44,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:01:47,239 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,244 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,245 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,245 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:01:47,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:01:47,889 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,890 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,891 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,892 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_ec2553cf-cf55-4d12-b0ae-7435237f95e2/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] [2021-11-21 01:01:47,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:01:48,177 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:01:48,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48 WrapperNode [2021-11-21 01:01:48,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:01:48,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:01:48,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:01:48,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:01:48,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,655 INFO L137 Inliner]: procedures = 370, calls = 2171, calls flagged for inlining = 172, calls inlined = 152, statements flattened = 4070 [2021-11-21 01:01:48,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:01:48,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:01:48,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:01:48,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:01:48,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:48,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:49,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:49,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:01:49,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:01:49,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:01:49,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:01:49,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (1/1) ... [2021-11-21 01:01:49,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:01:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:49,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:01:49,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:01:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_page_lock_of_ei_device [2021-11-21 01:01:49,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_page_lock_of_ei_device [2021-11-21 01:01:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:01:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:01:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_detach [2021-11-21 01:01:49,190 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_detach [2021-11-21 01:01:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:01:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:01:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:01:49,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 01:01:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:01:49,192 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:01:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure AX88190_init [2021-11-21 01:01:49,192 INFO L138 BoogieDeclarations]: Found implementation of procedure AX88190_init [2021-11-21 01:01:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-21 01:01:49,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-21 01:01:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:01:49,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:01:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2021-11-21 01:01:49,193 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2021-11-21 01:01:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-21 01:01:49,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-21 01:01:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_70 [2021-11-21 01:01:49,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_70 [2021-11-21 01:01:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:01:49,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 01:01:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure ei_receive [2021-11-21 01:01:49,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_receive [2021-11-21 01:01:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:01:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:01:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2021-11-21 01:01:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2021-11-21 01:01:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:01:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:01:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_release [2021-11-21 01:01:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_release [2021-11-21 01:01:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_write_config_byte [2021-11-21 01:01:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_write_config_byte [2021-11-21 01:01:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure insw [2021-11-21 01:01:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure insw [2021-11-21 01:01:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure PRIV [2021-11-21 01:01:49,199 INFO L138 BoogieDeclarations]: Found implementation of procedure PRIV [2021-11-21 01:01:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-21 01:01:49,202 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-21 01:01:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:01:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 01:01:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 01:01:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:01:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 01:01:49,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 01:01:49,206 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 01:01:49,206 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 01:01:49,207 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-21 01:01:49,207 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-21 01:01:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 01:01:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 01:01:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure NS8390_trigger_send [2021-11-21 01:01:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure NS8390_trigger_send [2021-11-21 01:01:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure ei_tx_intr [2021-11-21 01:01:49,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_tx_intr [2021-11-21 01:01:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:01:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:01:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:01:49,209 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:01:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 01:01:49,210 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 01:01:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:01:49,211 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:01:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 01:01:49,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 01:01:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:01:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-21 01:01:49,212 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-21 01:01:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:01:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 01:01:49,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 01:01:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:01:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 01:01:49,213 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 01:01:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure ei_irq_wrapper [2021-11-21 01:01:49,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_irq_wrapper [2021-11-21 01:01:49,214 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-21 01:01:49,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-21 01:01:49,215 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 01:01:49,215 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 01:01:49,215 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 01:01:49,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 01:01:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:01:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:01:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:01:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_reset_8390 [2021-11-21 01:01:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_reset_8390 [2021-11-21 01:01:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_tx_timeout [2021-11-21 01:01:49,218 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_tx_timeout [2021-11-21 01:01:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:01:49,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 01:01:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:01:49,218 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2021-11-21 01:01:49,219 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2021-11-21 01:01:49,219 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-21 01:01:49,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-21 01:01:49,219 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_cs_driver_exit [2021-11-21 01:01:49,220 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_cs_driver_exit [2021-11-21 01:01:49,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:01:49,221 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 01:01:49,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 01:01:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:01:49,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:01:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:01:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:01:49,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:01:49,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 01:01:49,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 01:01:49,230 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 01:01:49,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 01:01:49,235 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2021-11-21 01:01:49,235 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2021-11-21 01:01:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 01:01:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 01:01:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure do_set_multicast_list [2021-11-21 01:01:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure do_set_multicast_list [2021-11-21 01:01:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:01:49,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 01:01:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 01:01:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-21 01:01:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-21 01:01:49,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:01:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:01:50,099 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:01:50,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:01:50,648 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:01:57,402 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-21 01:01:57,545 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:01:58,540 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:01:58,540 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:01:58,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:58 BoogieIcfgContainer [2021-11-21 01:01:58,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:01:58,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:01:58,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:01:58,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:01:58,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:01:43" (1/3) ... [2021-11-21 01:01:58,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4935788e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:58, skipping insertion in model container [2021-11-21 01:01:58,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:01:48" (2/3) ... [2021-11-21 01:01:58,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4935788e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:58, skipping insertion in model container [2021-11-21 01:01:58,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:58" (3/3) ... [2021-11-21 01:01:58,559 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2021-11-21 01:01:58,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:01:58,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 01:01:58,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:01:58,660 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 [2021-11-21 01:01:58,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 01:01:58,723 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) [2021-11-21 01:01:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:01:58,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:58,743 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] [2021-11-21 01:01:58,744 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)] === [2021-11-21 01:01:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash 263466716, now seen corresponding path program 1 times [2021-11-21 01:01:58,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:58,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540697882] [2021-11-21 01:01:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:58,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-21 01:01:59,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540697882] [2021-11-21 01:01:59,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540697882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:59,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:01:59,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49374369] [2021-11-21 01:01:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:59,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:59,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:59,668 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) [2021-11-21 01:02:03,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:03,846 INFO L93 Difference]: Finished difference Result 2749 states and 4166 transitions. [2021-11-21 01:02:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:02:03,849 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 [2021-11-21 01:02:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:03,912 INFO L225 Difference]: With dead ends: 2749 [2021-11-21 01:02:03,913 INFO L226 Difference]: Without dead ends: 1801 [2021-11-21 01:02:03,931 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 [2021-11-21 01:02:03,938 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 1301 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:03,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 2732 Invalid, 397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 01:02:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-11-21 01:02:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1797. [2021-11-21 01:02:04,223 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) [2021-11-21 01:02:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2662 transitions. [2021-11-21 01:02:04,253 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2662 transitions. Word has length 91 [2021-11-21 01:02:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:04,255 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 2662 transitions. [2021-11-21 01:02:04,255 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) [2021-11-21 01:02:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2662 transitions. [2021-11-21 01:02:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 01:02:04,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:04,266 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] [2021-11-21 01:02:04,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:02:04,266 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)] === [2021-11-21 01:02:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -228041881, now seen corresponding path program 1 times [2021-11-21 01:02:04,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:04,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163392654] [2021-11-21 01:02:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:04,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-21 01:02:04,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:04,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163392654] [2021-11-21 01:02:04,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163392654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:04,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:04,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:02:04,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887810308] [2021-11-21 01:02:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:04,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:02:04,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:04,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:02:04,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:02:04,690 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) [2021-11-21 01:02:06,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:08,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:09,381 INFO L93 Difference]: Finished difference Result 5055 states and 7458 transitions. [2021-11-21 01:02:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:02:09,382 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 [2021-11-21 01:02:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:09,431 INFO L225 Difference]: With dead ends: 5055 [2021-11-21 01:02:09,431 INFO L226 Difference]: Without dead ends: 3273 [2021-11-21 01:02:09,448 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 [2021-11-21 01:02:09,450 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1115 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:09,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 2720 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-21 01:02:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-21 01:02:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3242. [2021-11-21 01:02:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 1810 states have (on average 1.2834254143646409) internal successors, (2323), 1892 states have internal predecessors, (2323), 1222 states have call successors, (1222), 206 states have call predecessors, (1222), 207 states have return successors, (1224), 1189 states have call predecessors, (1224), 1218 states have call successors, (1224) [2021-11-21 01:02:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 4769 transitions. [2021-11-21 01:02:09,802 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 4769 transitions. Word has length 99 [2021-11-21 01:02:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:09,805 INFO L470 AbstractCegarLoop]: Abstraction has 3242 states and 4769 transitions. [2021-11-21 01:02:09,805 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) [2021-11-21 01:02:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 4769 transitions. [2021-11-21 01:02:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:02:09,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:09,816 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] [2021-11-21 01:02:09,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:02:09,817 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)] === [2021-11-21 01:02:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash -864064538, now seen corresponding path program 1 times [2021-11-21 01:02:09,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:09,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338395901] [2021-11-21 01:02:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:09,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-21 01:02:10,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338395901] [2021-11-21 01:02:10,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338395901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:10,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:10,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:02:10,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587675743] [2021-11-21 01:02:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:10,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:02:10,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:02:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:02:10,307 INFO L87 Difference]: Start difference. First operand 3242 states and 4769 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) [2021-11-21 01:02:12,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:13,280 INFO L93 Difference]: Finished difference Result 8940 states and 13097 transitions. [2021-11-21 01:02:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:02:13,281 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 [2021-11-21 01:02:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:13,351 INFO L225 Difference]: With dead ends: 8940 [2021-11-21 01:02:13,352 INFO L226 Difference]: Without dead ends: 5713 [2021-11-21 01:02:13,378 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 [2021-11-21 01:02:13,382 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 1114 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:13,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 2684 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:02:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-11-21 01:02:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5680. [2021-11-21 01:02:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 3184 states have (on average 1.2792085427135678) internal successors, (4073), 3322 states have internal predecessors, (4073), 2108 states have call successors, (2108), 388 states have call predecessors, (2108), 385 states have return successors, (2116), 2035 states have call predecessors, (2116), 2104 states have call successors, (2116) [2021-11-21 01:02:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 8297 transitions. [2021-11-21 01:02:14,078 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 8297 transitions. Word has length 103 [2021-11-21 01:02:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:14,081 INFO L470 AbstractCegarLoop]: Abstraction has 5680 states and 8297 transitions. [2021-11-21 01:02:14,081 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) [2021-11-21 01:02:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 8297 transitions. [2021-11-21 01:02:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-21 01:02:14,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:14,095 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] [2021-11-21 01:02:14,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:02:14,096 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)] === [2021-11-21 01:02:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1590383950, now seen corresponding path program 1 times [2021-11-21 01:02:14,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:14,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056110437] [2021-11-21 01:02:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:14,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-21 01:02:14,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056110437] [2021-11-21 01:02:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056110437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:14,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:14,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:02:14,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326975760] [2021-11-21 01:02:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:14,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:02:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:02:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:02:14,421 INFO L87 Difference]: Start difference. First operand 5680 states and 8297 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) [2021-11-21 01:02:16,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:17,065 INFO L93 Difference]: Finished difference Result 10086 states and 14720 transitions. [2021-11-21 01:02:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:02:17,066 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 [2021-11-21 01:02:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:17,132 INFO L225 Difference]: With dead ends: 10086 [2021-11-21 01:02:17,133 INFO L226 Difference]: Without dead ends: 4421 [2021-11-21 01:02:17,182 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 [2021-11-21 01:02:17,189 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 1260 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:17,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 2276 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:02:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-21 01:02:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4382. [2021-11-21 01:02:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 2512 states have (on average 1.273487261146497) internal successors, (3199), 2656 states have internal predecessors, (3199), 1551 states have call successors, (1551), 355 states have call predecessors, (1551), 316 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2021-11-21 01:02:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 6333 transitions. [2021-11-21 01:02:17,695 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 6333 transitions. Word has length 118 [2021-11-21 01:02:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:17,696 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 6333 transitions. [2021-11-21 01:02:17,697 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) [2021-11-21 01:02:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 6333 transitions. [2021-11-21 01:02:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:02:17,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:17,702 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] [2021-11-21 01:02:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:02:17,703 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)] === [2021-11-21 01:02:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash 925306983, now seen corresponding path program 1 times [2021-11-21 01:02:17,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776071717] [2021-11-21 01:02:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:17,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-21 01:02:18,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776071717] [2021-11-21 01:02:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776071717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:18,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:18,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:18,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314125660] [2021-11-21 01:02:18,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:18,169 INFO L87 Difference]: Start difference. First operand 4382 states and 6333 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) [2021-11-21 01:02:21,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:22,438 INFO L93 Difference]: Finished difference Result 4388 states and 6338 transitions. [2021-11-21 01:02:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:22,439 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 [2021-11-21 01:02:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:22,489 INFO L225 Difference]: With dead ends: 4388 [2021-11-21 01:02:22,489 INFO L226 Difference]: Without dead ends: 4386 [2021-11-21 01:02:22,494 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 [2021-11-21 01:02:22,497 INFO L933 BasicCegarLoop]: 1198 mSDtfsCounter, 1344 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:22,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 3581 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-21 01:02:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-21 01:02:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4386. [2021-11-21 01:02:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 2515 states have (on average 1.2731610337972168) internal successors, (3202), 2659 states have internal predecessors, (3202), 1551 states have call successors, (1551), 356 states have call predecessors, (1551), 317 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2021-11-21 01:02:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 6336 transitions. [2021-11-21 01:02:22,933 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 6336 transitions. Word has length 133 [2021-11-21 01:02:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:22,935 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 6336 transitions. [2021-11-21 01:02:22,935 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) [2021-11-21 01:02:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 6336 transitions. [2021-11-21 01:02:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-21 01:02:22,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:22,939 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] [2021-11-21 01:02:22,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:02:22,940 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)] === [2021-11-21 01:02:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1451358043, now seen corresponding path program 1 times [2021-11-21 01:02:22,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477660037] [2021-11-21 01:02:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:22,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-21 01:02:23,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477660037] [2021-11-21 01:02:23,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477660037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:23,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:23,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:23,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321739676] [2021-11-21 01:02:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:23,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:23,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:23,367 INFO L87 Difference]: Start difference. First operand 4386 states and 6336 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) [2021-11-21 01:02:26,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:28,565 INFO L93 Difference]: Finished difference Result 4392 states and 6341 transitions. [2021-11-21 01:02:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:28,566 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 [2021-11-21 01:02:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:28,615 INFO L225 Difference]: With dead ends: 4392 [2021-11-21 01:02:28,616 INFO L226 Difference]: Without dead ends: 4390 [2021-11-21 01:02:28,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:02:28,621 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s 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, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:28,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 01:02:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-11-21 01:02:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4390. [2021-11-21 01:02:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 2518 states have (on average 1.272835583796664) internal successors, (3205), 2662 states have internal predecessors, (3205), 1551 states have call successors, (1551), 357 states have call predecessors, (1551), 318 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2021-11-21 01:02:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 6339 transitions. [2021-11-21 01:02:29,032 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 6339 transitions. Word has length 138 [2021-11-21 01:02:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:29,033 INFO L470 AbstractCegarLoop]: Abstraction has 4390 states and 6339 transitions. [2021-11-21 01:02:29,033 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) [2021-11-21 01:02:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 6339 transitions. [2021-11-21 01:02:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:02:29,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:29,038 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:29,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:02:29,039 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)] === [2021-11-21 01:02:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash -659841305, now seen corresponding path program 1 times [2021-11-21 01:02:29,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993918651] [2021-11-21 01:02:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:29,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-21 01:02:29,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993918651] [2021-11-21 01:02:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993918651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:29,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350115541] [2021-11-21 01:02:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:29,375 INFO L87 Difference]: Start difference. First operand 4390 states and 6339 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, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 01:02:32,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:33,856 INFO L93 Difference]: Finished difference Result 4396 states and 6344 transitions. [2021-11-21 01:02:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:33,857 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, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 143 [2021-11-21 01:02:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:33,903 INFO L225 Difference]: With dead ends: 4396 [2021-11-21 01:02:33,903 INFO L226 Difference]: Without dead ends: 4394 [2021-11-21 01:02:33,907 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 [2021-11-21 01:02:33,909 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 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, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:33,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1348 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:02:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-11-21 01:02:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 4394. [2021-11-21 01:02:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 2521 states have (on average 1.2725109083696946) internal successors, (3208), 2665 states have internal predecessors, (3208), 1551 states have call successors, (1551), 358 states have call predecessors, (1551), 319 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2021-11-21 01:02:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 6342 transitions. [2021-11-21 01:02:34,402 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 6342 transitions. Word has length 143 [2021-11-21 01:02:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:34,403 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 6342 transitions. [2021-11-21 01:02:34,404 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, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 01:02:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 6342 transitions. [2021-11-21 01:02:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:02:34,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:34,409 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] [2021-11-21 01:02:34,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:02:34,410 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)] === [2021-11-21 01:02:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2058831451, now seen corresponding path program 1 times [2021-11-21 01:02:34,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:34,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553879406] [2021-11-21 01:02:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:34,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-21 01:02:34,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:34,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553879406] [2021-11-21 01:02:34,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553879406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:34,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:34,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:34,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613161897] [2021-11-21 01:02:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:34,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:34,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:34,768 INFO L87 Difference]: Start difference. First operand 4394 states and 6342 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) [2021-11-21 01:02:39,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:39,819 INFO L93 Difference]: Finished difference Result 4400 states and 6347 transitions. [2021-11-21 01:02:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:39,820 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 [2021-11-21 01:02:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:39,853 INFO L225 Difference]: With dead ends: 4400 [2021-11-21 01:02:39,854 INFO L226 Difference]: Without dead ends: 4398 [2021-11-21 01:02:39,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:02:39,859 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 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, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:39,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-21 01:02:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2021-11-21 01:02:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 4398. [2021-11-21 01:02:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 2524 states have (on average 1.2721870047543582) internal successors, (3211), 2668 states have internal predecessors, (3211), 1551 states have call successors, (1551), 359 states have call predecessors, (1551), 320 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2021-11-21 01:02:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 6345 transitions. [2021-11-21 01:02:40,200 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 6345 transitions. Word has length 148 [2021-11-21 01:02:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:40,204 INFO L470 AbstractCegarLoop]: Abstraction has 4398 states and 6345 transitions. [2021-11-21 01:02:40,204 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) [2021-11-21 01:02:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 6345 transitions. [2021-11-21 01:02:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-21 01:02:40,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:40,209 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:02:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:02:40,210 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)] === [2021-11-21 01:02:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1193218945, now seen corresponding path program 1 times [2021-11-21 01:02:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:40,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125407718] [2021-11-21 01:02:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:40,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-21 01:02:40,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:40,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125407718] [2021-11-21 01:02:40,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125407718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:40,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:40,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:40,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43903665] [2021-11-21 01:02:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:40,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:40,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:40,584 INFO L87 Difference]: Start difference. First operand 4398 states and 6345 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:02:43,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:44,369 INFO L93 Difference]: Finished difference Result 4419 states and 6363 transitions. [2021-11-21 01:02:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 160 [2021-11-21 01:02:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:44,398 INFO L225 Difference]: With dead ends: 4419 [2021-11-21 01:02:44,398 INFO L226 Difference]: Without dead ends: 4417 [2021-11-21 01:02:44,402 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 [2021-11-21 01:02:44,405 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1332 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 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, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:44,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 3611 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:02:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2021-11-21 01:02:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 4417. [2021-11-21 01:02:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4417 states, 2535 states have (on average 1.2714003944773176) internal successors, (3223), 2680 states have internal predecessors, (3223), 1553 states have call successors, (1553), 365 states have call predecessors, (1553), 326 states have return successors, (1585), 1407 states have call predecessors, (1585), 1549 states have call successors, (1585) [2021-11-21 01:02:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4417 states to 4417 states and 6361 transitions. [2021-11-21 01:02:44,781 INFO L78 Accepts]: Start accepts. Automaton has 4417 states and 6361 transitions. Word has length 160 [2021-11-21 01:02:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:44,782 INFO L470 AbstractCegarLoop]: Abstraction has 4417 states and 6361 transitions. [2021-11-21 01:02:44,783 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, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-21 01:02:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4417 states and 6361 transitions. [2021-11-21 01:02:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-21 01:02:44,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:44,788 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 5, 5, 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] [2021-11-21 01:02:44,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:02:44,789 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)] === [2021-11-21 01:02:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash -420062579, now seen corresponding path program 1 times [2021-11-21 01:02:44,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:44,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207755759] [2021-11-21 01:02:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:44,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-21 01:02:45,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:45,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207755759] [2021-11-21 01:02:45,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207755759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:45,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:45,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:45,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138796017] [2021-11-21 01:02:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:45,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:45,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:45,101 INFO L87 Difference]: Start difference. First operand 4417 states and 6361 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) [2021-11-21 01:02:48,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:48,999 INFO L93 Difference]: Finished difference Result 4423 states and 6366 transitions. [2021-11-21 01:02:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:02:49,000 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 165 [2021-11-21 01:02:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:49,029 INFO L225 Difference]: With dead ends: 4423 [2021-11-21 01:02:49,029 INFO L226 Difference]: Without dead ends: 4421 [2021-11-21 01:02:49,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:02:49,034 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1332 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 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, 3.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:49,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 3611 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-21 01:02:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-21 01:02:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4421. [2021-11-21 01:02:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 2538 states have (on average 1.2710795902285263) internal successors, (3226), 2683 states have internal predecessors, (3226), 1553 states have call successors, (1553), 366 states have call predecessors, (1553), 327 states have return successors, (1585), 1407 states have call predecessors, (1585), 1549 states have call successors, (1585) [2021-11-21 01:02:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6364 transitions. [2021-11-21 01:02:49,415 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6364 transitions. Word has length 165 [2021-11-21 01:02:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:49,416 INFO L470 AbstractCegarLoop]: Abstraction has 4421 states and 6364 transitions. [2021-11-21 01:02:49,416 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) [2021-11-21 01:02:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6364 transitions. [2021-11-21 01:02:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-21 01:02:49,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:49,422 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] [2021-11-21 01:02:49,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:02:49,422 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)] === [2021-11-21 01:02:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash -49249180, now seen corresponding path program 1 times [2021-11-21 01:02:49,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423577041] [2021-11-21 01:02:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:49,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-21 01:02:49,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423577041] [2021-11-21 01:02:49,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423577041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:49,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:49,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:02:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245749280] [2021-11-21 01:02:49,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:49,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:02:49,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:02:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:02:49,681 INFO L87 Difference]: Start difference. First operand 4421 states and 6364 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) [2021-11-21 01:02:52,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:53,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:02:54,180 INFO L93 Difference]: Finished difference Result 9735 states and 14027 transitions. [2021-11-21 01:02:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:02:54,181 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 [2021-11-21 01:02:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:02:54,214 INFO L225 Difference]: With dead ends: 9735 [2021-11-21 01:02:54,215 INFO L226 Difference]: Without dead ends: 5383 [2021-11-21 01:02:54,245 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 [2021-11-21 01:02:54,246 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 466 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:02:54,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 2767 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-21 01:02:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2021-11-21 01:02:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 5328. [2021-11-21 01:02:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 3083 states have (on average 1.2721375283814467) internal successors, (3922), 3274 states have internal predecessors, (3922), 1837 states have call successors, (1837), 477 states have call predecessors, (1837), 405 states have return successors, (1881), 1612 states have call predecessors, (1881), 1833 states have call successors, (1881) [2021-11-21 01:02:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 7640 transitions. [2021-11-21 01:02:54,710 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 7640 transitions. Word has length 165 [2021-11-21 01:02:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:02:54,711 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 7640 transitions. [2021-11-21 01:02:54,712 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) [2021-11-21 01:02:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 7640 transitions. [2021-11-21 01:02:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-21 01:02:54,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:02:54,717 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] [2021-11-21 01:02:54,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:02:54,719 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)] === [2021-11-21 01:02:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:02:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -986704041, now seen corresponding path program 1 times [2021-11-21 01:02:54,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:02:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527324741] [2021-11-21 01:02:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:02:54,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:02:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:02:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-21 01:02:54,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:02:54,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527324741] [2021-11-21 01:02:54,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527324741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:02:54,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:02:54,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:02:54,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075722856] [2021-11-21 01:02:54,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:02:54,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:02:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:02:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:02:54,992 INFO L87 Difference]: Start difference. First operand 5328 states and 7640 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) [2021-11-21 01:02:57,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:02:59,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:00,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:00,784 INFO L93 Difference]: Finished difference Result 5334 states and 7645 transitions. [2021-11-21 01:03:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:00,786 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 [2021-11-21 01:03:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:00,821 INFO L225 Difference]: With dead ends: 5334 [2021-11-21 01:03:00,822 INFO L226 Difference]: Without dead ends: 5332 [2021-11-21 01:03:00,826 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 [2021-11-21 01:03:00,828 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:00,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 01:03:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5332 states. [2021-11-21 01:03:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5332 to 5332. [2021-11-21 01:03:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 3086 states have (on average 1.2718729747245625) internal successors, (3925), 3277 states have internal predecessors, (3925), 1837 states have call successors, (1837), 478 states have call predecessors, (1837), 406 states have return successors, (1881), 1612 states have call predecessors, (1881), 1833 states have call successors, (1881) [2021-11-21 01:03:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 7643 transitions. [2021-11-21 01:03:01,332 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 7643 transitions. Word has length 171 [2021-11-21 01:03:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:01,335 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 7643 transitions. [2021-11-21 01:03:01,335 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) [2021-11-21 01:03:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 7643 transitions. [2021-11-21 01:03:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-21 01:03:01,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:01,340 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] [2021-11-21 01:03:01,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:03:01,340 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)] === [2021-11-21 01:03:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:01,341 INFO L85 PathProgramCache]: Analyzing trace with hash -579524211, now seen corresponding path program 1 times [2021-11-21 01:03:01,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:01,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257282717] [2021-11-21 01:03:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:01,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-11-21 01:03:01,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257282717] [2021-11-21 01:03:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257282717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:01,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:01,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:01,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648187779] [2021-11-21 01:03:01,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:01,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:01,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:01,638 INFO L87 Difference]: Start difference. First operand 5332 states and 7643 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) [2021-11-21 01:03:05,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:07,210 INFO L93 Difference]: Finished difference Result 5338 states and 7648 transitions. [2021-11-21 01:03:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:07,211 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 [2021-11-21 01:03:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:07,242 INFO L225 Difference]: With dead ends: 5338 [2021-11-21 01:03:07,242 INFO L226 Difference]: Without dead ends: 5336 [2021-11-21 01:03:07,245 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 [2021-11-21 01:03:07,246 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 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, 5.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:07,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-21 01:03:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-11-21 01:03:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 5336. [2021-11-21 01:03:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 3089 states have (on average 1.2716089349303983) internal successors, (3928), 3280 states have internal predecessors, (3928), 1837 states have call successors, (1837), 479 states have call predecessors, (1837), 407 states have return successors, (1881), 1612 states have call predecessors, (1881), 1833 states have call successors, (1881) [2021-11-21 01:03:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 7646 transitions. [2021-11-21 01:03:07,703 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 7646 transitions. Word has length 175 [2021-11-21 01:03:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:07,704 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 7646 transitions. [2021-11-21 01:03:07,704 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) [2021-11-21 01:03:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 7646 transitions. [2021-11-21 01:03:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-21 01:03:07,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:07,709 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] [2021-11-21 01:03:07,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:03:07,709 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)] === [2021-11-21 01:03:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash -585979289, now seen corresponding path program 1 times [2021-11-21 01:03:07,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136714289] [2021-11-21 01:03:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:07,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-11-21 01:03:07,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:07,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136714289] [2021-11-21 01:03:07,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136714289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:07,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:07,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:07,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949659834] [2021-11-21 01:03:07,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:07,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:07,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:07,980 INFO L87 Difference]: Start difference. First operand 5336 states and 7646 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) [2021-11-21 01:03:11,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:13,863 INFO L93 Difference]: Finished difference Result 6193 states and 8743 transitions. [2021-11-21 01:03:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:13,864 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 [2021-11-21 01:03:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:13,899 INFO L225 Difference]: With dead ends: 6193 [2021-11-21 01:03:13,899 INFO L226 Difference]: Without dead ends: 6191 [2021-11-21 01:03:13,903 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 [2021-11-21 01:03:13,905 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 931 mSDsluCounter, 3816 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:13,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 4720 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 01:03:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6191 states. [2021-11-21 01:03:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6191 to 6149. [2021-11-21 01:03:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6149 states, 3489 states have (on average 1.2553740326741187) internal successors, (4380), 3694 states have internal predecessors, (4380), 2131 states have call successors, (2131), 634 states have call predecessors, (2131), 526 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2021-11-21 01:03:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6149 states to 6149 states and 8692 transitions. [2021-11-21 01:03:14,473 INFO L78 Accepts]: Start accepts. Automaton has 6149 states and 8692 transitions. Word has length 173 [2021-11-21 01:03:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:14,475 INFO L470 AbstractCegarLoop]: Abstraction has 6149 states and 8692 transitions. [2021-11-21 01:03:14,475 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) [2021-11-21 01:03:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6149 states and 8692 transitions. [2021-11-21 01:03:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-21 01:03:14,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:14,481 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] [2021-11-21 01:03:14,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:03:14,482 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)] === [2021-11-21 01:03:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 471233333, now seen corresponding path program 1 times [2021-11-21 01:03:14,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174318666] [2021-11-21 01:03:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:14,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-21 01:03:14,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174318666] [2021-11-21 01:03:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174318666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:14,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:14,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753717537] [2021-11-21 01:03:14,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:14,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:14,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:14,813 INFO L87 Difference]: Start difference. First operand 6149 states and 8692 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) [2021-11-21 01:03:18,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:19,325 INFO L93 Difference]: Finished difference Result 6155 states and 8697 transitions. [2021-11-21 01:03:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:19,326 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 [2021-11-21 01:03:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:19,379 INFO L225 Difference]: With dead ends: 6155 [2021-11-21 01:03:19,379 INFO L226 Difference]: Without dead ends: 6153 [2021-11-21 01:03:19,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:03:19,393 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:19,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-21 01:03:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2021-11-21 01:03:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6153. [2021-11-21 01:03:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 3492 states have (on average 1.2551546391752577) internal successors, (4383), 3697 states have internal predecessors, (4383), 2131 states have call successors, (2131), 635 states have call predecessors, (2131), 527 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2021-11-21 01:03:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8695 transitions. [2021-11-21 01:03:20,007 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8695 transitions. Word has length 186 [2021-11-21 01:03:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:20,008 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 8695 transitions. [2021-11-21 01:03:20,008 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) [2021-11-21 01:03:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8695 transitions. [2021-11-21 01:03:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-21 01:03:20,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:20,015 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 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, 1, 1] [2021-11-21 01:03:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:03:20,015 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)] === [2021-11-21 01:03:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 493358167, now seen corresponding path program 1 times [2021-11-21 01:03:20,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:20,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930338124] [2021-11-21 01:03:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:20,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2021-11-21 01:03:20,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930338124] [2021-11-21 01:03:20,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930338124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:20,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:20,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:20,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334599383] [2021-11-21 01:03:20,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:20,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:20,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:20,316 INFO L87 Difference]: Start difference. First operand 6153 states and 8695 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:03:24,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:25,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:26,558 INFO L93 Difference]: Finished difference Result 6159 states and 8700 transitions. [2021-11-21 01:03:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:26,559 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 191 [2021-11-21 01:03:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:26,601 INFO L225 Difference]: With dead ends: 6159 [2021-11-21 01:03:26,601 INFO L226 Difference]: Without dead ends: 6155 [2021-11-21 01:03:26,607 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 [2021-11-21 01:03:26,608 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 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, 5.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:26,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-21 01:03:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-11-21 01:03:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 6155. [2021-11-21 01:03:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6155 states, 3494 states have (on average 1.254722381224957) internal successors, (4384), 3698 states have internal predecessors, (4384), 2131 states have call successors, (2131), 636 states have call predecessors, (2131), 527 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2021-11-21 01:03:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6155 states to 6155 states and 8696 transitions. [2021-11-21 01:03:27,253 INFO L78 Accepts]: Start accepts. Automaton has 6155 states and 8696 transitions. Word has length 191 [2021-11-21 01:03:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 6155 states and 8696 transitions. [2021-11-21 01:03:27,254 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, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-21 01:03:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6155 states and 8696 transitions. [2021-11-21 01:03:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-21 01:03:27,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:27,260 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] [2021-11-21 01:03:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:03:27,261 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)] === [2021-11-21 01:03:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1107847283, now seen corresponding path program 1 times [2021-11-21 01:03:27,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552537647] [2021-11-21 01:03:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:27,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-21 01:03:27,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:27,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552537647] [2021-11-21 01:03:27,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552537647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:27,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:27,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:27,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759260310] [2021-11-21 01:03:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:27,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:27,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:27,612 INFO L87 Difference]: Start difference. First operand 6155 states and 8696 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) [2021-11-21 01:03:30,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:31,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:32,271 INFO L93 Difference]: Finished difference Result 6155 states and 8696 transitions. [2021-11-21 01:03:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:32,272 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 [2021-11-21 01:03:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:32,295 INFO L225 Difference]: With dead ends: 6155 [2021-11-21 01:03:32,296 INFO L226 Difference]: Without dead ends: 5996 [2021-11-21 01:03:32,302 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 [2021-11-21 01:03:32,303 INFO L933 BasicCegarLoop]: 1199 mSDtfsCounter, 1334 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:32,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 3581 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-21 01:03:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-11-21 01:03:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5996. [2021-11-21 01:03:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 3440 states have (on average 1.2482558139534883) internal successors, (4294), 3608 states have internal predecessors, (4294), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2021-11-21 01:03:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 8432 transitions. [2021-11-21 01:03:33,005 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 8432 transitions. Word has length 195 [2021-11-21 01:03:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:33,006 INFO L470 AbstractCegarLoop]: Abstraction has 5996 states and 8432 transitions. [2021-11-21 01:03:33,006 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) [2021-11-21 01:03:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 8432 transitions. [2021-11-21 01:03:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-21 01:03:33,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:33,013 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] [2021-11-21 01:03:33,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:03:33,014 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)] === [2021-11-21 01:03:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1050896028, now seen corresponding path program 1 times [2021-11-21 01:03:33,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:33,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881043979] [2021-11-21 01:03:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:33,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-21 01:03:33,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881043979] [2021-11-21 01:03:33,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881043979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:33,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:33,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:03:33,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595183828] [2021-11-21 01:03:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:03:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:03:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:03:33,439 INFO L87 Difference]: Start difference. First operand 5996 states and 8432 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) [2021-11-21 01:03:38,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:38,996 INFO L93 Difference]: Finished difference Result 6009 states and 8443 transitions. [2021-11-21 01:03:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:03:38,996 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 [2021-11-21 01:03:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:39,018 INFO L225 Difference]: With dead ends: 6009 [2021-11-21 01:03:39,019 INFO L226 Difference]: Without dead ends: 6007 [2021-11-21 01:03:39,023 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 [2021-11-21 01:03:39,023 INFO L933 BasicCegarLoop]: 1322 mSDtfsCounter, 856 mSDsluCounter, 3731 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:39,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 4584 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-21 01:03:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-11-21 01:03:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 5996. [2021-11-21 01:03:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 3440 states have (on average 1.2450581395348836) internal successors, (4283), 3608 states have internal predecessors, (4283), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2021-11-21 01:03:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 8421 transitions. [2021-11-21 01:03:39,701 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 8421 transitions. Word has length 208 [2021-11-21 01:03:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:39,702 INFO L470 AbstractCegarLoop]: Abstraction has 5996 states and 8421 transitions. [2021-11-21 01:03:39,702 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) [2021-11-21 01:03:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 8421 transitions. [2021-11-21 01:03:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-21 01:03:39,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:39,715 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] [2021-11-21 01:03:39,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:03:39,715 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)] === [2021-11-21 01:03:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1364524109, now seen corresponding path program 1 times [2021-11-21 01:03:39,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:39,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341979650] [2021-11-21 01:03:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:39,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2725 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2021-11-21 01:03:40,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341979650] [2021-11-21 01:03:40,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341979650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:40,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:40,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:03:40,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180427458] [2021-11-21 01:03:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:03:40,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:03:40,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:03:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:03:40,224 INFO L87 Difference]: Start difference. First operand 5996 states and 8421 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) [2021-11-21 01:03:42,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:03:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:03:43,867 INFO L93 Difference]: Finished difference Result 11963 states and 16887 transitions. [2021-11-21 01:03:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:03:43,868 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 [2021-11-21 01:03:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:03:43,990 INFO L225 Difference]: With dead ends: 11963 [2021-11-21 01:03:43,990 INFO L226 Difference]: Without dead ends: 6036 [2021-11-21 01:03:44,012 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 [2021-11-21 01:03:44,013 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 2 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:03:44,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2305 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 01:03:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-11-21 01:03:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 6004. [2021-11-21 01:03:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6004 states, 3448 states have (on average 1.2444895591647331) internal successors, (4291), 3616 states have internal predecessors, (4291), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2021-11-21 01:03:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6004 states to 6004 states and 8429 transitions. [2021-11-21 01:03:44,468 INFO L78 Accepts]: Start accepts. Automaton has 6004 states and 8429 transitions. Word has length 552 [2021-11-21 01:03:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:03:44,470 INFO L470 AbstractCegarLoop]: Abstraction has 6004 states and 8429 transitions. [2021-11-21 01:03:44,470 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) [2021-11-21 01:03:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6004 states and 8429 transitions. [2021-11-21 01:03:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-21 01:03:44,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:03:44,493 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] [2021-11-21 01:03:44,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:03:44,493 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)] === [2021-11-21 01:03:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:03:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1200348678, now seen corresponding path program 1 times [2021-11-21 01:03:44,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:03:44,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228921252] [2021-11-21 01:03:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:44,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:03:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2021-11-21 01:03:44,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:03:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228921252] [2021-11-21 01:03:44,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228921252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:03:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501744202] [2021-11-21 01:03:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:03:44,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:03:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:03:44,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:03:44,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec2553cf-cf55-4d12-b0ae-7435237f95e2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:03:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:03:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 6291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:03:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:03:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 588 proven. 1 refuted. 0 times theorem prover too weak. 2637 trivial. 0 not checked. [2021-11-21 01:03:48,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:03:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2021-11-21 01:03:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501744202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:03:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938442866] [2021-11-21 01:03:50,869 INFO L159 IcfgInterpreter]: Started Sifa with 201 locations of interest [2021-11-21 01:03:50,870 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:03:50,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:03:50,886 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:03:50,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:04:43,870 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 [2021-11-21 01:04:49,513 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 [2021-11-21 01:05:36,237 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