./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-usb-smsc75xx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:28:53,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:28:53,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:28:53,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:28:53,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:28:53,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:28:53,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:28:53,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:28:53,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:28:53,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:28:53,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:28:53,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:28:53,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:28:53,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:28:53,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:28:53,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:28:53,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:28:53,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:28:53,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:28:53,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:28:53,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:28:53,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:28:53,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:28:53,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:28:53,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:28:53,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:28:53,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:28:53,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:28:53,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:28:53,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:28:53,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:28:53,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:28:53,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:28:53,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:28:53,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:28:53,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:28:53,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:28:53,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:28:53,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:28:53,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:28:53,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:28:53,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:28:53,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:28:53,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:28:53,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:28:53,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:28:53,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:28:53,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:28:53,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:28:53,923 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:28:53,923 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:28:53,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:28:53,924 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:28:53,924 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:28:53,925 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:28:53,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:28:53,925 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:28:53,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:28:53,926 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:28:53,926 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:28:53,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:28:53,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:28:53,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:28:53,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:28:53,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:28:53,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:28:53,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:28:53,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:28:53,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:28:53,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:28:53,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:28:53,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:28:53,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:28:53,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:28:53,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:28:53,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:28:53,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:28:53,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:28:53,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:28:53,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:28:53,933 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 [2021-11-25 20:28:54,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:28:54,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:28:54,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:28:54,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:28:54,271 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:28:54,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-25 20:28:54,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/data/e7a8dca6d/50d71d035bb24faa9021d111f52dbd54/FLAGc14b887a7 [2021-11-25 20:28:55,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:28:55,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-25 20:28:55,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/data/e7a8dca6d/50d71d035bb24faa9021d111f52dbd54/FLAGc14b887a7 [2021-11-25 20:28:55,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/data/e7a8dca6d/50d71d035bb24faa9021d111f52dbd54 [2021-11-25 20:28:55,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:28:55,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:28:55,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:28:55,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:28:55,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:28:55,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:28:55" (1/1) ... [2021-11-25 20:28:55,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef1bd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:55, skipping insertion in model container [2021-11-25 20:28:55,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:28:55" (1/1) ... [2021-11-25 20:28:55,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:28:55,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:28:58,619 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-25 20:28:58,621 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-25 20:28:58,622 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-25 20:28:58,622 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-25 20:28:58,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:28:58,671 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:28:59,033 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-25 20:28:59,033 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-25 20:28:59,034 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-25 20:28:59,034 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_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-25 20:28:59,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:28:59,332 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:28:59,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59 WrapperNode [2021-11-25 20:28:59,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:28:59,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:28:59,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:28:59,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:28:59,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,665 INFO L137 Inliner]: procedures = 390, calls = 3756, calls flagged for inlining = 180, calls inlined = 163, statements flattened = 7743 [2021-11-25 20:28:59,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:28:59,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:28:59,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:28:59,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:28:59,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:28:59,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:29:00,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:29:00,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:29:00,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:29:00,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:29:00,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:29:00,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (1/1) ... [2021-11-25 20:29:00,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:29:00,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:00,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:29:00,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16159ec8-f8ba-4f5a-ae70-ab9bfe8231be/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:29:00,138 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg_nopm [2021-11-25 20:29:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg_nopm [2021-11-25 20:29:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:29:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:29:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-25 20:29:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-25 20:29:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:29:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:29:00,139 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-25 20:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-25 20:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-25 20:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-25 20:29:00,140 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-25 20:29:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-25 20:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_reset [2021-11-25 20:29:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_reset [2021-11-25 20:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_eeprom [2021-11-25 20:29:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_eeprom [2021-11-25 20:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_write [2021-11-25 20:29:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_write [2021-11-25 20:29:00,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:29:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:29:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-25 20:29:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 20:29:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 20:29:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_rx_csum_offload [2021-11-25 20:29:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_rx_csum_offload [2021-11-25 20:29:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 20:29:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 20:29:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:29:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:29:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:29:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_features [2021-11-25 20:29:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_features [2021-11-25 20:29:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:29:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-25 20:29:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-25 20:29:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:29:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:29:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:29:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-25 20:29:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-25 20:29:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read_nopm [2021-11-25 20:29:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read_nopm [2021-11-25 20:29:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:29:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:29:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:29:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-25 20:29:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_phy_wait_not_busy [2021-11-25 20:29:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_phy_wait_not_busy [2021-11-25 20:29:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-25 20:29:00,149 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-25 20:29:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write [2021-11-25 20:29:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write [2021-11-25 20:29:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-25 20:29:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:29:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:29:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:29:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 20:29:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 20:29:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 20:29:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 20:29:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:29:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:29:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:29:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 20:29:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 20:29:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:29:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:29:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:29:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-25 20:29:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-25 20:29:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read [2021-11-25 20:29:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read [2021-11-25 20:29:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_rx_max_frame_length [2021-11-25 20:29:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_rx_max_frame_length [2021-11-25 20:29:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 20:29:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 20:29:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:29:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:29:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_read_reg [2021-11-25 20:29:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_read_reg [2021-11-25 20:29:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 20:29:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 20:29:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 20:29:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 20:29:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-25 20:29:00,161 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-25 20:29:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:29:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:29:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:29:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:29:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-25 20:29:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-25 20:29:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-25 20:29:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-25 20:29:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:29:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:29:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-25 20:29:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u8~0~X~~u8~0~X~~u16~0~X~~u16~0~X~$Pointer$~X~~u16~0~TO~int [2021-11-25 20:29:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg [2021-11-25 20:29:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg [2021-11-25 20:29:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-25 20:29:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-25 20:29:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 20:29:00,168 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 20:29:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write_nopm [2021-11-25 20:29:00,169 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write_nopm [2021-11-25 20:29:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_multicast [2021-11-25 20:29:00,170 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_multicast [2021-11-25 20:29:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:29:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 20:29:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 20:29:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:29:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:29:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 20:29:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 20:29:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:29:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:29:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_read [2021-11-25 20:29:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_read [2021-11-25 20:29:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:29:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:29:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 20:29:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 20:29:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg_nopm [2021-11-25 20:29:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg_nopm [2021-11-25 20:29:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-25 20:29:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-25 20:29:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_write_reg [2021-11-25 20:29:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_write_reg [2021-11-25 20:29:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-25 20:29:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-25 20:29:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_ready [2021-11-25 20:29:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_ready [2021-11-25 20:29:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:29:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-25 20:29:00,178 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-25 20:29:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_eeprom [2021-11-25 20:29:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_eeprom [2021-11-25 20:29:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:29:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:29:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-25 20:29:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_link_reset [2021-11-25 20:29:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_link_reset [2021-11-25 20:29:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_resume [2021-11-25 20:29:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_resume [2021-11-25 20:29:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_wuff [2021-11-25 20:29:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_wuff [2021-11-25 20:29:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-25 20:29:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-25 20:29:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:29:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:29:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend2 [2021-11-25 20:29:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend2 [2021-11-25 20:29:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend1 [2021-11-25 20:29:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend1 [2021-11-25 20:29:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg [2021-11-25 20:29:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg [2021-11-25 20:29:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:29:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-25 20:29:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-25 20:29:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:29:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:29:01,061 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:29:01,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:29:01,594 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:29:05,769 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 20:29:09,740 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:29:10,623 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:29:10,623 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:29:10,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:10 BoogieIcfgContainer [2021-11-25 20:29:10,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:29:10,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:29:10,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:29:10,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:29:10,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:28:55" (1/3) ... [2021-11-25 20:29:10,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2710de45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:10, skipping insertion in model container [2021-11-25 20:29:10,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:28:59" (2/3) ... [2021-11-25 20:29:10,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2710de45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:10, skipping insertion in model container [2021-11-25 20:29:10,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:10" (3/3) ... [2021-11-25 20:29:10,638 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-25 20:29:10,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:29:10,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 20:29:10,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:29:10,736 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:29:10,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 20:29:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 1346 states, 868 states have (on average 1.3997695852534562) internal successors, (1215), 871 states have internal predecessors, (1215), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2021-11-25 20:29:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 20:29:10,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:10,829 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 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] [2021-11-25 20:29:10,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1010905639, now seen corresponding path program 1 times [2021-11-25 20:29:10,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:10,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821304022] [2021-11-25 20:29:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:10,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2021-11-25 20:29:11,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821304022] [2021-11-25 20:29:11,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821304022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:11,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:11,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:29:11,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903515926] [2021-11-25 20:29:11,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:11,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:29:11,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:29:11,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:11,671 INFO L87 Difference]: Start difference. First operand has 1346 states, 868 states have (on average 1.3997695852534562) internal successors, (1215), 871 states have internal predecessors, (1215), 403 states have call successors, (403), 73 states have call predecessors, (403), 72 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) 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, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:29:14,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:15,708 INFO L93 Difference]: Finished difference Result 3887 states and 5869 transitions. [2021-11-25 20:29:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:29:15,711 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, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 194 [2021-11-25 20:29:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:15,763 INFO L225 Difference]: With dead ends: 3887 [2021-11-25 20:29:15,764 INFO L226 Difference]: Without dead ends: 2565 [2021-11-25 20:29:15,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:15,786 INFO L933 BasicCegarLoop]: 2099 mSDtfsCounter, 1869 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 3811 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:15,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1869 Valid, 3811 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 535 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 20:29:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-11-25 20:29:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2561. [2021-11-25 20:29:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 1677 states have (on average 1.3977340488968395) internal successors, (2344), 1682 states have internal predecessors, (2344), 741 states have call successors, (741), 141 states have call predecessors, (741), 140 states have return successors, (737), 737 states have call predecessors, (737), 737 states have call successors, (737) [2021-11-25 20:29:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3822 transitions. [2021-11-25 20:29:16,193 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3822 transitions. Word has length 194 [2021-11-25 20:29:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:16,195 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3822 transitions. [2021-11-25 20:29:16,195 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, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:29:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3822 transitions. [2021-11-25 20:29:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-25 20:29:16,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:16,206 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:16,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:29:16,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1324102734, now seen corresponding path program 1 times [2021-11-25 20:29:16,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375433747] [2021-11-25 20:29:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:16,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-25 20:29:16,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375433747] [2021-11-25 20:29:16,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375433747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:16,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:16,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:29:16,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809381972] [2021-11-25 20:29:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:16,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:29:16,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:29:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:16,530 INFO L87 Difference]: Start difference. First operand 2561 states and 3822 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:29:18,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:21,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:22,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:22,172 INFO L93 Difference]: Finished difference Result 7243 states and 10776 transitions. [2021-11-25 20:29:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:29:22,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 203 [2021-11-25 20:29:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:22,216 INFO L225 Difference]: With dead ends: 7243 [2021-11-25 20:29:22,216 INFO L226 Difference]: Without dead ends: 4717 [2021-11-25 20:29:22,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:22,233 INFO L933 BasicCegarLoop]: 2417 mSDtfsCounter, 1622 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 4109 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:22,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 4109 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 587 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 20:29:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-11-25 20:29:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 4690. [2021-11-25 20:29:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 3064 states have (on average 1.387402088772846) internal successors, (4251), 3074 states have internal predecessors, (4251), 1356 states have call successors, (1356), 268 states have call predecessors, (1356), 267 states have return successors, (1354), 1347 states have call predecessors, (1354), 1352 states have call successors, (1354) [2021-11-25 20:29:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6961 transitions. [2021-11-25 20:29:22,506 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6961 transitions. Word has length 203 [2021-11-25 20:29:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 6961 transitions. [2021-11-25 20:29:22,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:29:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6961 transitions. [2021-11-25 20:29:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 20:29:22,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:22,516 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:22,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:29:22,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:22,517 INFO L85 PathProgramCache]: Analyzing trace with hash 511305150, now seen corresponding path program 1 times [2021-11-25 20:29:22,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:22,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303318346] [2021-11-25 20:29:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:22,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1270 trivial. 0 not checked. [2021-11-25 20:29:23,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:23,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303318346] [2021-11-25 20:29:23,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303318346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:23,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:23,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:23,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235541034] [2021-11-25 20:29:23,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:23,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:23,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:23,045 INFO L87 Difference]: Start difference. First operand 4690 states and 6961 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:29:25,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:26,864 INFO L93 Difference]: Finished difference Result 4696 states and 6966 transitions. [2021-11-25 20:29:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:26,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 238 [2021-11-25 20:29:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:26,901 INFO L225 Difference]: With dead ends: 4696 [2021-11-25 20:29:26,902 INFO L226 Difference]: Without dead ends: 4694 [2021-11-25 20:29:26,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:26,910 INFO L933 BasicCegarLoop]: 1727 mSDtfsCounter, 1920 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 5168 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:26,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1931 Valid, 5168 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 786 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 20:29:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-11-25 20:29:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4694. [2021-11-25 20:29:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 3067 states have (on average 1.387023149657646) internal successors, (4254), 3077 states have internal predecessors, (4254), 1356 states have call successors, (1356), 269 states have call predecessors, (1356), 268 states have return successors, (1354), 1347 states have call predecessors, (1354), 1352 states have call successors, (1354) [2021-11-25 20:29:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6964 transitions. [2021-11-25 20:29:27,185 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6964 transitions. Word has length 238 [2021-11-25 20:29:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:27,190 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 6964 transitions. [2021-11-25 20:29:27,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:29:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6964 transitions. [2021-11-25 20:29:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-25 20:29:27,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:27,200 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:27,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:29:27,200 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1516873341, now seen corresponding path program 1 times [2021-11-25 20:29:27,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058719828] [2021-11-25 20:29:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:27,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-25 20:29:27,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058719828] [2021-11-25 20:29:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058719828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:27,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:27,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:27,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810563102] [2021-11-25 20:29:27,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:27,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:27,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:27,555 INFO L87 Difference]: Start difference. First operand 4694 states and 6964 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-25 20:29:29,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:31,297 INFO L93 Difference]: Finished difference Result 4700 states and 6969 transitions. [2021-11-25 20:29:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 244 [2021-11-25 20:29:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:31,334 INFO L225 Difference]: With dead ends: 4700 [2021-11-25 20:29:31,334 INFO L226 Difference]: Without dead ends: 4698 [2021-11-25 20:29:31,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:31,341 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:29:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-25 20:29:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4698. [2021-11-25 20:29:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 3070 states have (on average 1.3866449511400651) internal successors, (4257), 3080 states have internal predecessors, (4257), 1356 states have call successors, (1356), 270 states have call predecessors, (1356), 269 states have return successors, (1354), 1347 states have call predecessors, (1354), 1352 states have call successors, (1354) [2021-11-25 20:29:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 6967 transitions. [2021-11-25 20:29:31,625 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 6967 transitions. Word has length 244 [2021-11-25 20:29:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:31,626 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 6967 transitions. [2021-11-25 20:29:31,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-25 20:29:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 6967 transitions. [2021-11-25 20:29:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-25 20:29:31,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:31,639 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:29:31,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 853282590, now seen corresponding path program 1 times [2021-11-25 20:29:31,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:31,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071622673] [2021-11-25 20:29:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:31,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1274 trivial. 0 not checked. [2021-11-25 20:29:31,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:31,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071622673] [2021-11-25 20:29:31,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071622673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:31,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:31,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:31,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195137635] [2021-11-25 20:29:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:31,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:31,940 INFO L87 Difference]: Start difference. First operand 4698 states and 6967 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:29:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:35,166 INFO L93 Difference]: Finished difference Result 4704 states and 6972 transitions. [2021-11-25 20:29:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 248 [2021-11-25 20:29:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:35,202 INFO L225 Difference]: With dead ends: 4704 [2021-11-25 20:29:35,202 INFO L226 Difference]: Without dead ends: 4702 [2021-11-25 20:29:35,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:35,208 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 20:29:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2021-11-25 20:29:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 4702. [2021-11-25 20:29:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4702 states, 3073 states have (on average 1.3862674910510902) internal successors, (4260), 3083 states have internal predecessors, (4260), 1356 states have call successors, (1356), 271 states have call predecessors, (1356), 270 states have return successors, (1354), 1347 states have call predecessors, (1354), 1352 states have call successors, (1354) [2021-11-25 20:29:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4702 states to 4702 states and 6970 transitions. [2021-11-25 20:29:35,525 INFO L78 Accepts]: Start accepts. Automaton has 4702 states and 6970 transitions. Word has length 248 [2021-11-25 20:29:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:35,525 INFO L470 AbstractCegarLoop]: Abstraction has 4702 states and 6970 transitions. [2021-11-25 20:29:35,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:29:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4702 states and 6970 transitions. [2021-11-25 20:29:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-25 20:29:35,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:35,537 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:35,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:29:35,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1038311673, now seen corresponding path program 1 times [2021-11-25 20:29:35,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:35,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809300959] [2021-11-25 20:29:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:35,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2021-11-25 20:29:35,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:35,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809300959] [2021-11-25 20:29:35,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809300959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:35,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:35,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:35,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838605887] [2021-11-25 20:29:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:35,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:35,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:35,832 INFO L87 Difference]: Start difference. First operand 4702 states and 6970 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:29:37,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:39,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:41,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:42,776 INFO L93 Difference]: Finished difference Result 4742 states and 7014 transitions. [2021-11-25 20:29:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 253 [2021-11-25 20:29:42,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:42,810 INFO L225 Difference]: With dead ends: 4742 [2021-11-25 20:29:42,811 INFO L226 Difference]: Without dead ends: 4740 [2021-11-25 20:29:42,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:42,815 INFO L933 BasicCegarLoop]: 1734 mSDtfsCounter, 1913 mSDsluCounter, 3980 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 5197 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:42,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 5197 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 792 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-25 20:29:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2021-11-25 20:29:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 4738. [2021-11-25 20:29:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 3094 states have (on average 1.3849385908209437) internal successors, (4285), 3106 states have internal predecessors, (4285), 1362 states have call successors, (1362), 278 states have call predecessors, (1362), 279 states have return successors, (1364), 1353 states have call predecessors, (1364), 1358 states have call successors, (1364) [2021-11-25 20:29:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 7011 transitions. [2021-11-25 20:29:43,171 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 7011 transitions. Word has length 253 [2021-11-25 20:29:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:43,173 INFO L470 AbstractCegarLoop]: Abstraction has 4738 states and 7011 transitions. [2021-11-25 20:29:43,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:29:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 7011 transitions. [2021-11-25 20:29:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-25 20:29:43,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:43,186 INFO L514 BasicCegarLoop]: trace histogram [20, 17, 17, 17, 17, 17, 17, 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] [2021-11-25 20:29:43,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:29:43,186 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1818185699, now seen corresponding path program 1 times [2021-11-25 20:29:43,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:43,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824270564] [2021-11-25 20:29:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:43,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2021-11-25 20:29:43,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824270564] [2021-11-25 20:29:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824270564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:43,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:43,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:29:43,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911899352] [2021-11-25 20:29:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:43,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:29:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:29:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:43,444 INFO L87 Difference]: Start difference. First operand 4738 states and 7011 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:29:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:45,742 INFO L93 Difference]: Finished difference Result 10145 states and 14994 transitions. [2021-11-25 20:29:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:29:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 250 [2021-11-25 20:29:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:45,782 INFO L225 Difference]: With dead ends: 10145 [2021-11-25 20:29:45,782 INFO L226 Difference]: Without dead ends: 5442 [2021-11-25 20:29:45,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:45,806 INFO L933 BasicCegarLoop]: 2073 mSDtfsCounter, 1659 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:45,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 3785 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:29:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2021-11-25 20:29:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5395. [2021-11-25 20:29:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5395 states, 3499 states have (on average 1.3812517862246356) internal successors, (4833), 3524 states have internal predecessors, (4833), 1567 states have call successors, (1567), 325 states have call predecessors, (1567), 326 states have return successors, (1569), 1545 states have call predecessors, (1569), 1563 states have call successors, (1569) [2021-11-25 20:29:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 7969 transitions. [2021-11-25 20:29:46,089 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 7969 transitions. Word has length 250 [2021-11-25 20:29:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 5395 states and 7969 transitions. [2021-11-25 20:29:46,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:29:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 7969 transitions. [2021-11-25 20:29:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-25 20:29:46,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:46,098 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:46,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:29:46,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1301524606, now seen corresponding path program 1 times [2021-11-25 20:29:46,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:46,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667268528] [2021-11-25 20:29:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:46,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1294 trivial. 0 not checked. [2021-11-25 20:29:46,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:46,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667268528] [2021-11-25 20:29:46,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667268528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:46,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:46,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:46,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142834287] [2021-11-25 20:29:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:46,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:46,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:46,379 INFO L87 Difference]: Start difference. First operand 5395 states and 7969 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:29:49,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:49,821 INFO L93 Difference]: Finished difference Result 5401 states and 7974 transitions. [2021-11-25 20:29:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:49,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 258 [2021-11-25 20:29:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:49,844 INFO L225 Difference]: With dead ends: 5401 [2021-11-25 20:29:49,844 INFO L226 Difference]: Without dead ends: 5399 [2021-11-25 20:29:49,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:49,848 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:49,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:29:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2021-11-25 20:29:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2021-11-25 20:29:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 3502 states have (on average 1.3809251856082239) internal successors, (4836), 3527 states have internal predecessors, (4836), 1567 states have call successors, (1567), 326 states have call predecessors, (1567), 327 states have return successors, (1569), 1545 states have call predecessors, (1569), 1563 states have call successors, (1569) [2021-11-25 20:29:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 7972 transitions. [2021-11-25 20:29:50,122 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 7972 transitions. Word has length 258 [2021-11-25 20:29:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:50,123 INFO L470 AbstractCegarLoop]: Abstraction has 5399 states and 7972 transitions. [2021-11-25 20:29:50,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:29:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 7972 transitions. [2021-11-25 20:29:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-25 20:29:50,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:50,133 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:50,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:29:50,133 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 434896656, now seen corresponding path program 1 times [2021-11-25 20:29:50,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890150009] [2021-11-25 20:29:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:50,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2021-11-25 20:29:50,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:50,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890150009] [2021-11-25 20:29:50,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890150009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:50,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:50,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:50,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375223541] [2021-11-25 20:29:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:50,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:50,414 INFO L87 Difference]: Start difference. First operand 5399 states and 7972 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:29:53,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:29:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:54,355 INFO L93 Difference]: Finished difference Result 5405 states and 7977 transitions. [2021-11-25 20:29:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 262 [2021-11-25 20:29:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:54,378 INFO L225 Difference]: With dead ends: 5405 [2021-11-25 20:29:54,378 INFO L226 Difference]: Without dead ends: 5403 [2021-11-25 20:29:54,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:54,382 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:54,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 20:29:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2021-11-25 20:29:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5403. [2021-11-25 20:29:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 3505 states have (on average 1.380599144079886) internal successors, (4839), 3530 states have internal predecessors, (4839), 1567 states have call successors, (1567), 327 states have call predecessors, (1567), 328 states have return successors, (1569), 1545 states have call predecessors, (1569), 1563 states have call successors, (1569) [2021-11-25 20:29:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 7975 transitions. [2021-11-25 20:29:54,715 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 7975 transitions. Word has length 262 [2021-11-25 20:29:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:54,716 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 7975 transitions. [2021-11-25 20:29:54,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:29:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 7975 transitions. [2021-11-25 20:29:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-25 20:29:54,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:54,728 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:54,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:29:54,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash 874624264, now seen corresponding path program 1 times [2021-11-25 20:29:54,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:54,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062179438] [2021-11-25 20:29:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:54,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2021-11-25 20:29:55,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062179438] [2021-11-25 20:29:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062179438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:55,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:55,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:55,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844671616] [2021-11-25 20:29:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:55,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:55,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:55,008 INFO L87 Difference]: Start difference. First operand 5403 states and 7975 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 20:29:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:57,489 INFO L93 Difference]: Finished difference Result 5409 states and 7980 transitions. [2021-11-25 20:29:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 269 [2021-11-25 20:29:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:57,511 INFO L225 Difference]: With dead ends: 5409 [2021-11-25 20:29:57,512 INFO L226 Difference]: Without dead ends: 5407 [2021-11-25 20:29:57,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:57,516 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:57,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:29:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-11-25 20:29:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5407. [2021-11-25 20:29:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 3508 states have (on average 1.3802736602052452) internal successors, (4842), 3533 states have internal predecessors, (4842), 1567 states have call successors, (1567), 328 states have call predecessors, (1567), 329 states have return successors, (1569), 1545 states have call predecessors, (1569), 1563 states have call successors, (1569) [2021-11-25 20:29:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 7978 transitions. [2021-11-25 20:29:57,878 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 7978 transitions. Word has length 269 [2021-11-25 20:29:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:57,879 INFO L470 AbstractCegarLoop]: Abstraction has 5407 states and 7978 transitions. [2021-11-25 20:29:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 20:29:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 7978 transitions. [2021-11-25 20:29:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-25 20:29:57,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:57,893 INFO L514 BasicCegarLoop]: trace histogram [22, 17, 17, 17, 17, 17, 17, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:57,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:29:57,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:29:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash 160231278, now seen corresponding path program 1 times [2021-11-25 20:29:57,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:57,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878661139] [2021-11-25 20:29:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:57,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-11-25 20:29:58,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:58,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878661139] [2021-11-25 20:29:58,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878661139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:58,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:58,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:29:58,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807044315] [2021-11-25 20:29:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:29:58,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:29:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:29:58,130 INFO L87 Difference]: Start difference. First operand 5407 states and 7978 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:30:02,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:02,788 INFO L93 Difference]: Finished difference Result 12108 states and 17855 transitions. [2021-11-25 20:30:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:30:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 263 [2021-11-25 20:30:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:02,822 INFO L225 Difference]: With dead ends: 12108 [2021-11-25 20:30:02,822 INFO L226 Difference]: Without dead ends: 7628 [2021-11-25 20:30:02,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:02,844 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 1762 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 4913 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:02,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 4913 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 739 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 20:30:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7628 states. [2021-11-25 20:30:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7628 to 7567. [2021-11-25 20:30:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7567 states, 4917 states have (on average 1.3833638397396786) internal successors, (6802), 4956 states have internal predecessors, (6802), 2182 states have call successors, (2182), 464 states have call predecessors, (2182), 465 states have return successors, (2184), 2146 states have call predecessors, (2184), 2178 states have call successors, (2184) [2021-11-25 20:30:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7567 states to 7567 states and 11168 transitions. [2021-11-25 20:30:03,341 INFO L78 Accepts]: Start accepts. Automaton has 7567 states and 11168 transitions. Word has length 263 [2021-11-25 20:30:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:03,342 INFO L470 AbstractCegarLoop]: Abstraction has 7567 states and 11168 transitions. [2021-11-25 20:30:03,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:30:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7567 states and 11168 transitions. [2021-11-25 20:30:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-25 20:30:03,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:03,354 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:03,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:30:03,354 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1688232432, now seen corresponding path program 1 times [2021-11-25 20:30:03,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063347528] [2021-11-25 20:30:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:03,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2021-11-25 20:30:03,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:03,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063347528] [2021-11-25 20:30:03,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063347528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:03,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:03,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:03,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099604988] [2021-11-25 20:30:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:03,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:03,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:03,607 INFO L87 Difference]: Start difference. First operand 7567 states and 11168 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 20:30:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:06,014 INFO L93 Difference]: Finished difference Result 7573 states and 11173 transitions. [2021-11-25 20:30:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:30:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 272 [2021-11-25 20:30:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:06,042 INFO L225 Difference]: With dead ends: 7573 [2021-11-25 20:30:06,043 INFO L226 Difference]: Without dead ends: 7571 [2021-11-25 20:30:06,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:06,048 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:06,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:30:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-11-25 20:30:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7571. [2021-11-25 20:30:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 4920 states have (on average 1.383130081300813) internal successors, (6805), 4959 states have internal predecessors, (6805), 2182 states have call successors, (2182), 465 states have call predecessors, (2182), 466 states have return successors, (2184), 2146 states have call predecessors, (2184), 2178 states have call successors, (2184) [2021-11-25 20:30:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 11171 transitions. [2021-11-25 20:30:06,638 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 11171 transitions. Word has length 272 [2021-11-25 20:30:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:06,639 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 11171 transitions. [2021-11-25 20:30:06,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 20:30:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 11171 transitions. [2021-11-25 20:30:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-25 20:30:06,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:06,653 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 9, 8, 8, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:06,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:30:06,653 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash 29219304, now seen corresponding path program 1 times [2021-11-25 20:30:06,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007158988] [2021-11-25 20:30:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:06,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2021-11-25 20:30:06,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:06,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007158988] [2021-11-25 20:30:06,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007158988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:06,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:06,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:06,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353917207] [2021-11-25 20:30:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:06,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:06,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:06,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:06,902 INFO L87 Difference]: Start difference. First operand 7571 states and 11171 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:30:08,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:10,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:12,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:13,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:13,848 INFO L93 Difference]: Finished difference Result 7577 states and 11176 transitions. [2021-11-25 20:30:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:30:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 279 [2021-11-25 20:30:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:13,877 INFO L225 Difference]: With dead ends: 7577 [2021-11-25 20:30:13,877 INFO L226 Difference]: Without dead ends: 7575 [2021-11-25 20:30:13,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:13,882 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:13,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 785 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-25 20:30:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2021-11-25 20:30:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 7575. [2021-11-25 20:30:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7575 states, 4923 states have (on average 1.3828966077594962) internal successors, (6808), 4962 states have internal predecessors, (6808), 2182 states have call successors, (2182), 466 states have call predecessors, (2182), 467 states have return successors, (2184), 2146 states have call predecessors, (2184), 2178 states have call successors, (2184) [2021-11-25 20:30:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7575 states to 7575 states and 11174 transitions. [2021-11-25 20:30:14,377 INFO L78 Accepts]: Start accepts. Automaton has 7575 states and 11174 transitions. Word has length 279 [2021-11-25 20:30:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 7575 states and 11174 transitions. [2021-11-25 20:30:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:30:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7575 states and 11174 transitions. [2021-11-25 20:30:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-25 20:30:14,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:14,391 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 10, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:14,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:30:14,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 606769405, now seen corresponding path program 1 times [2021-11-25 20:30:14,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:14,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526267252] [2021-11-25 20:30:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:14,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-11-25 20:30:14,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:14,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526267252] [2021-11-25 20:30:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526267252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:14,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562408209] [2021-11-25 20:30:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:14,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:14,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:14,639 INFO L87 Difference]: Start difference. First operand 7575 states and 11174 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 20:30:17,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:17,868 INFO L93 Difference]: Finished difference Result 7616 states and 11200 transitions. [2021-11-25 20:30:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:30:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 284 [2021-11-25 20:30:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:17,898 INFO L225 Difference]: With dead ends: 7616 [2021-11-25 20:30:17,899 INFO L226 Difference]: Without dead ends: 7614 [2021-11-25 20:30:17,903 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 [2021-11-25 20:30:17,904 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1858 mSDsluCounter, 4011 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 5219 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:17,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1860 Valid, 5219 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 20:30:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7614 states. [2021-11-25 20:30:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7614 to 7614. [2021-11-25 20:30:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7614 states, 4947 states have (on average 1.3810390135435617) internal successors, (6832), 4986 states have internal predecessors, (6832), 2182 states have call successors, (2182), 481 states have call predecessors, (2182), 482 states have return successors, (2184), 2146 states have call predecessors, (2184), 2178 states have call successors, (2184) [2021-11-25 20:30:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7614 states to 7614 states and 11198 transitions. [2021-11-25 20:30:18,457 INFO L78 Accepts]: Start accepts. Automaton has 7614 states and 11198 transitions. Word has length 284 [2021-11-25 20:30:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:18,457 INFO L470 AbstractCegarLoop]: Abstraction has 7614 states and 11198 transitions. [2021-11-25 20:30:18,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-25 20:30:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7614 states and 11198 transitions. [2021-11-25 20:30:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-25 20:30:18,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:18,472 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 11, 10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:18,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:30:18,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 500872917, now seen corresponding path program 1 times [2021-11-25 20:30:18,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:18,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710162566] [2021-11-25 20:30:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:18,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-25 20:30:18,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:18,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710162566] [2021-11-25 20:30:18,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710162566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:18,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:18,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:18,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076173088] [2021-11-25 20:30:18,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:18,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:18,731 INFO L87 Difference]: Start difference. First operand 7614 states and 11198 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:30:21,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:22,731 INFO L93 Difference]: Finished difference Result 14223 states and 20921 transitions. [2021-11-25 20:30:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:30:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 287 [2021-11-25 20:30:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:22,771 INFO L225 Difference]: With dead ends: 14223 [2021-11-25 20:30:22,772 INFO L226 Difference]: Without dead ends: 14219 [2021-11-25 20:30:22,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:22,778 INFO L933 BasicCegarLoop]: 2155 mSDtfsCounter, 1887 mSDsluCounter, 6746 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 8126 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:22,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1888 Valid, 8126 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1056 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:30:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2021-11-25 20:30:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 14213. [2021-11-25 20:30:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14213 states, 9234 states have (on average 1.382716049382716) internal successors, (12768), 9308 states have internal predecessors, (12768), 4071 states have call successors, (4071), 904 states have call predecessors, (4071), 905 states have return successors, (4075), 4000 states have call predecessors, (4075), 4063 states have call successors, (4075) [2021-11-25 20:30:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14213 states to 14213 states and 20914 transitions. [2021-11-25 20:30:23,720 INFO L78 Accepts]: Start accepts. Automaton has 14213 states and 20914 transitions. Word has length 287 [2021-11-25 20:30:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:23,721 INFO L470 AbstractCegarLoop]: Abstraction has 14213 states and 20914 transitions. [2021-11-25 20:30:23,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:30:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14213 states and 20914 transitions. [2021-11-25 20:30:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-25 20:30:23,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:23,738 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:23,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:30:23,739 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1557382474, now seen corresponding path program 1 times [2021-11-25 20:30:23,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:23,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505847460] [2021-11-25 20:30:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:23,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:30:23,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:23,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505847460] [2021-11-25 20:30:23,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505847460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:23,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:23,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:23,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610474402] [2021-11-25 20:30:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:23,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:23,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:23,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:23,978 INFO L87 Difference]: Start difference. First operand 14213 states and 20914 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:30:26,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:30,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:32,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:34,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:34,965 INFO L93 Difference]: Finished difference Result 31756 states and 46638 transitions. [2021-11-25 20:30:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:30:34,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 284 [2021-11-25 20:30:34,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:35,006 INFO L225 Difference]: With dead ends: 31756 [2021-11-25 20:30:35,006 INFO L226 Difference]: Without dead ends: 18475 [2021-11-25 20:30:35,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:35,052 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 1623 mSDsluCounter, 9112 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 11217 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:35,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 11217 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1608 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2021-11-25 20:30:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18475 states. [2021-11-25 20:30:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18475 to 18325. [2021-11-25 20:30:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18325 states, 11878 states have (on average 1.3801986866475837) internal successors, (16394), 11980 states have internal predecessors, (16394), 5267 states have call successors, (5267), 1172 states have call predecessors, (5267), 1177 states have return successors, (5275), 5172 states have call predecessors, (5275), 5259 states have call successors, (5275) [2021-11-25 20:30:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18325 states to 18325 states and 26936 transitions. [2021-11-25 20:30:36,096 INFO L78 Accepts]: Start accepts. Automaton has 18325 states and 26936 transitions. Word has length 284 [2021-11-25 20:30:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:36,096 INFO L470 AbstractCegarLoop]: Abstraction has 18325 states and 26936 transitions. [2021-11-25 20:30:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:30:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18325 states and 26936 transitions. [2021-11-25 20:30:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-25 20:30:36,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:36,113 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:36,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:30:36,114 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:36,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash 686726935, now seen corresponding path program 1 times [2021-11-25 20:30:36,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:36,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921995145] [2021-11-25 20:30:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:36,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:30:36,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921995145] [2021-11-25 20:30:36,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921995145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:36,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:36,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:36,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728169098] [2021-11-25 20:30:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:36,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:36,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:36,363 INFO L87 Difference]: Start difference. First operand 18325 states and 26936 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:30:39,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:41,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:43,483 INFO L93 Difference]: Finished difference Result 40048 states and 58785 transitions. [2021-11-25 20:30:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:30:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 285 [2021-11-25 20:30:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:43,543 INFO L225 Difference]: With dead ends: 40048 [2021-11-25 20:30:43,544 INFO L226 Difference]: Without dead ends: 22655 [2021-11-25 20:30:43,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:43,580 INFO L933 BasicCegarLoop]: 3256 mSDtfsCounter, 1710 mSDsluCounter, 9299 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 11460 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 11460 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1654 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-25 20:30:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22655 states. [2021-11-25 20:30:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22655 to 22505. [2021-11-25 20:30:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22505 states, 14571 states have (on average 1.3784228947910233) internal successors, (20085), 14701 states have internal predecessors, (20085), 6478 states have call successors, (6478), 1444 states have call predecessors, (6478), 1453 states have return successors, (6490), 6359 states have call predecessors, (6490), 6470 states have call successors, (6490) [2021-11-25 20:30:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22505 states to 22505 states and 33053 transitions. [2021-11-25 20:30:45,137 INFO L78 Accepts]: Start accepts. Automaton has 22505 states and 33053 transitions. Word has length 285 [2021-11-25 20:30:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:45,138 INFO L470 AbstractCegarLoop]: Abstraction has 22505 states and 33053 transitions. [2021-11-25 20:30:45,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:30:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 22505 states and 33053 transitions. [2021-11-25 20:30:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-25 20:30:45,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:45,162 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 12, 11, 11, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:45,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:30:45,162 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash 159086471, now seen corresponding path program 1 times [2021-11-25 20:30:45,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:45,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117282926] [2021-11-25 20:30:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:45,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-25 20:30:45,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:45,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117282926] [2021-11-25 20:30:45,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117282926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:45,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:45,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:45,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529187604] [2021-11-25 20:30:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:45,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:45,430 INFO L87 Difference]: Start difference. First operand 22505 states and 33053 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 20:30:48,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:49,525 INFO L93 Difference]: Finished difference Result 22511 states and 33058 transitions. [2021-11-25 20:30:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:30:49,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 293 [2021-11-25 20:30:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:49,588 INFO L225 Difference]: With dead ends: 22511 [2021-11-25 20:30:49,588 INFO L226 Difference]: Without dead ends: 22351 [2021-11-25 20:30:49,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:49,596 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1915 mSDsluCounter, 3955 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 5174 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:49,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 5174 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 783 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:30:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22351 states. [2021-11-25 20:30:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22351 to 22351. [2021-11-25 20:30:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 14515 states have (on average 1.3777471581122975) internal successors, (19998), 14615 states have internal predecessors, (19998), 6402 states have call successors, (6402), 1421 states have call predecessors, (6402), 1431 states have return successors, (6418), 6314 states have call predecessors, (6418), 6398 states have call successors, (6418) [2021-11-25 20:30:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 32818 transitions. [2021-11-25 20:30:50,689 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 32818 transitions. Word has length 293 [2021-11-25 20:30:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:50,690 INFO L470 AbstractCegarLoop]: Abstraction has 22351 states and 32818 transitions. [2021-11-25 20:30:50,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 20:30:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 32818 transitions. [2021-11-25 20:30:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-25 20:30:50,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:50,707 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:50,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:30:50,708 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1497563314, now seen corresponding path program 1 times [2021-11-25 20:30:50,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703005305] [2021-11-25 20:30:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:50,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:30:50,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:50,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703005305] [2021-11-25 20:30:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703005305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:50,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:50,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:50,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382398486] [2021-11-25 20:30:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:50,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:50,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:50,910 INFO L87 Difference]: Start difference. First operand 22351 states and 32818 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:30:53,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:56,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:58,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:01,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:03,074 INFO L93 Difference]: Finished difference Result 48093 states and 70558 transitions. [2021-11-25 20:31:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 286 [2021-11-25 20:31:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:03,146 INFO L225 Difference]: With dead ends: 48093 [2021-11-25 20:31:03,146 INFO L226 Difference]: Without dead ends: 26674 [2021-11-25 20:31:03,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:03,187 INFO L933 BasicCegarLoop]: 3249 mSDtfsCounter, 1720 mSDsluCounter, 9274 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 11427 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:03,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 11427 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1662 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2021-11-25 20:31:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2021-11-25 20:31:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 26588. [2021-11-25 20:31:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26588 states, 17258 states have (on average 1.3762313130142543) internal successors, (23751), 17380 states have internal predecessors, (23751), 7613 states have call successors, (7613), 1700 states have call predecessors, (7613), 1714 states have return successors, (7633), 7507 states have call predecessors, (7633), 7609 states have call successors, (7633) [2021-11-25 20:31:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26588 states to 26588 states and 38997 transitions. [2021-11-25 20:31:04,391 INFO L78 Accepts]: Start accepts. Automaton has 26588 states and 38997 transitions. Word has length 286 [2021-11-25 20:31:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:04,391 INFO L470 AbstractCegarLoop]: Abstraction has 26588 states and 38997 transitions. [2021-11-25 20:31:04,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 26588 states and 38997 transitions. [2021-11-25 20:31:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-25 20:31:04,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:04,408 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:04,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:31:04,408 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash 83969720, now seen corresponding path program 1 times [2021-11-25 20:31:04,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:04,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678863340] [2021-11-25 20:31:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:04,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:31:04,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678863340] [2021-11-25 20:31:04,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678863340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:04,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:04,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:04,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678362205] [2021-11-25 20:31:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:04,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:04,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:04,838 INFO L87 Difference]: Start difference. First operand 26588 states and 38997 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:08,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:10,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:13,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:15,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:18,543 INFO L93 Difference]: Finished difference Result 56508 states and 82840 transitions. [2021-11-25 20:31:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 287 [2021-11-25 20:31:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:18,624 INFO L225 Difference]: With dead ends: 56508 [2021-11-25 20:31:18,624 INFO L226 Difference]: Without dead ends: 30852 [2021-11-25 20:31:18,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:18,662 INFO L933 BasicCegarLoop]: 3251 mSDtfsCounter, 1711 mSDsluCounter, 9285 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 11441 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:18,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 11441 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1662 Invalid, 4 Unknown, 0 Unchecked, 12.2s Time] [2021-11-25 20:31:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30852 states. [2021-11-25 20:31:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30852 to 30766. [2021-11-25 20:31:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30766 states, 19963 states have (on average 1.3749436457446276) internal successors, (27448), 20107 states have internal predecessors, (27448), 8812 states have call successors, (8812), 1970 states have call predecessors, (8812), 1988 states have return successors, (8836), 8688 states have call predecessors, (8836), 8808 states have call successors, (8836) [2021-11-25 20:31:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30766 states to 30766 states and 45096 transitions. [2021-11-25 20:31:20,039 INFO L78 Accepts]: Start accepts. Automaton has 30766 states and 45096 transitions. Word has length 287 [2021-11-25 20:31:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 30766 states and 45096 transitions. [2021-11-25 20:31:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 30766 states and 45096 transitions. [2021-11-25 20:31:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-25 20:31:20,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:20,050 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:20,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:31:20,051 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1220690256, now seen corresponding path program 1 times [2021-11-25 20:31:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229013873] [2021-11-25 20:31:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:31:20,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:20,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229013873] [2021-11-25 20:31:20,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229013873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:20,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:20,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:20,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184283206] [2021-11-25 20:31:20,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:20,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:20,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:20,468 INFO L87 Difference]: Start difference. First operand 30766 states and 45096 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:23,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:26,111 INFO L93 Difference]: Finished difference Result 64808 states and 94959 transitions. [2021-11-25 20:31:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 288 [2021-11-25 20:31:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:26,247 INFO L225 Difference]: With dead ends: 64808 [2021-11-25 20:31:26,247 INFO L226 Difference]: Without dead ends: 34974 [2021-11-25 20:31:26,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:26,324 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 1620 mSDsluCounter, 9108 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 11215 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:26,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 11215 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1630 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 20:31:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34974 states. [2021-11-25 20:31:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34974 to 34888. [2021-11-25 20:31:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34888 states, 22631 states have (on average 1.3738677035924174) internal successors, (31092), 22797 states have internal predecessors, (31092), 9996 states have call successors, (9996), 2236 states have call predecessors, (9996), 2258 states have return successors, (10024), 9854 states have call predecessors, (10024), 9992 states have call successors, (10024) [2021-11-25 20:31:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34888 states to 34888 states and 51112 transitions. [2021-11-25 20:31:28,260 INFO L78 Accepts]: Start accepts. Automaton has 34888 states and 51112 transitions. Word has length 288 [2021-11-25 20:31:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 34888 states and 51112 transitions. [2021-11-25 20:31:28,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 34888 states and 51112 transitions. [2021-11-25 20:31:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-25 20:31:28,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:28,270 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:28,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 20:31:28,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash -404672234, now seen corresponding path program 1 times [2021-11-25 20:31:28,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:28,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523855543] [2021-11-25 20:31:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:28,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:31:28,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523855543] [2021-11-25 20:31:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523855543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:28,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:28,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:28,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381398766] [2021-11-25 20:31:28,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:28,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:28,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:28,467 INFO L87 Difference]: Start difference. First operand 34888 states and 51112 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:30,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:34,188 INFO L93 Difference]: Finished difference Result 73056 states and 106999 transitions. [2021-11-25 20:31:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 289 [2021-11-25 20:31:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:34,320 INFO L225 Difference]: With dead ends: 73056 [2021-11-25 20:31:34,320 INFO L226 Difference]: Without dead ends: 39100 [2021-11-25 20:31:34,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:34,392 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 1620 mSDsluCounter, 9108 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 11215 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:34,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 11215 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1633 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:31:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39100 states. [2021-11-25 20:31:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39100 to 39014. [2021-11-25 20:31:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39014 states, 25303 states have (on average 1.3729597280954828) internal successors, (34740), 25491 states have internal predecessors, (34740), 11180 states have call successors, (11180), 2502 states have call predecessors, (11180), 2528 states have return successors, (11212), 11020 states have call predecessors, (11212), 11176 states have call successors, (11212) [2021-11-25 20:31:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39014 states to 39014 states and 57132 transitions. [2021-11-25 20:31:36,443 INFO L78 Accepts]: Start accepts. Automaton has 39014 states and 57132 transitions. Word has length 289 [2021-11-25 20:31:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:36,444 INFO L470 AbstractCegarLoop]: Abstraction has 39014 states and 57132 transitions. [2021-11-25 20:31:36,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39014 states and 57132 transitions. [2021-11-25 20:31:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-25 20:31:36,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:36,455 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:36,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:31:36,456 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1063696321, now seen corresponding path program 1 times [2021-11-25 20:31:36,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:36,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795905769] [2021-11-25 20:31:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:36,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:31:36,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795905769] [2021-11-25 20:31:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795905769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:36,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:36,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:36,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313486677] [2021-11-25 20:31:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:36,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:36,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:36,654 INFO L87 Difference]: Start difference. First operand 39014 states and 57132 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:40,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:42,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:46,038 INFO L93 Difference]: Finished difference Result 81312 states and 119047 transitions. [2021-11-25 20:31:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 290 [2021-11-25 20:31:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:46,163 INFO L225 Difference]: With dead ends: 81312 [2021-11-25 20:31:46,163 INFO L226 Difference]: Without dead ends: 43230 [2021-11-25 20:31:46,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:46,386 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 1620 mSDsluCounter, 9112 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 11215 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:46,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 11215 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1640 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-25 20:31:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43230 states. [2021-11-25 20:31:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43230 to 43144. [2021-11-25 20:31:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43144 states, 27979 states have (on average 1.3721719861324564) internal successors, (38392), 28189 states have internal predecessors, (38392), 12364 states have call successors, (12364), 2768 states have call predecessors, (12364), 2798 states have return successors, (12400), 12186 states have call predecessors, (12400), 12360 states have call successors, (12400) [2021-11-25 20:31:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43144 states to 43144 states and 63156 transitions. [2021-11-25 20:31:48,733 INFO L78 Accepts]: Start accepts. Automaton has 43144 states and 63156 transitions. Word has length 290 [2021-11-25 20:31:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:48,734 INFO L470 AbstractCegarLoop]: Abstraction has 43144 states and 63156 transitions. [2021-11-25 20:31:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 43144 states and 63156 transitions. [2021-11-25 20:31:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-25 20:31:48,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:48,757 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:48,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:31:48,757 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1291195828, now seen corresponding path program 1 times [2021-11-25 20:31:48,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035083199] [2021-11-25 20:31:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:48,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:31:48,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035083199] [2021-11-25 20:31:48,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035083199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:48,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:48,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:48,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733129526] [2021-11-25 20:31:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:48,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:48,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:48,983 INFO L87 Difference]: Start difference. First operand 43144 states and 63156 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:31:50,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:52,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:56,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:00,230 INFO L93 Difference]: Finished difference Result 89576 states and 131103 transitions. [2021-11-25 20:32:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 291 [2021-11-25 20:32:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:00,410 INFO L225 Difference]: With dead ends: 89576 [2021-11-25 20:32:00,410 INFO L226 Difference]: Without dead ends: 47364 [2021-11-25 20:32:00,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:32:00,507 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 1623 mSDsluCounter, 9111 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 11213 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:00,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 11213 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1644 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 20:32:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47364 states. [2021-11-25 20:32:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47364 to 47278. [2021-11-25 20:32:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47278 states, 30659 states have (on average 1.3714733031083859) internal successors, (42048), 30891 states have internal predecessors, (42048), 13548 states have call successors, (13548), 3034 states have call predecessors, (13548), 3068 states have return successors, (13588), 13352 states have call predecessors, (13588), 13544 states have call successors, (13588) [2021-11-25 20:32:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47278 states to 47278 states and 69184 transitions. [2021-11-25 20:32:03,446 INFO L78 Accepts]: Start accepts. Automaton has 47278 states and 69184 transitions. Word has length 291 [2021-11-25 20:32:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:03,447 INFO L470 AbstractCegarLoop]: Abstraction has 47278 states and 69184 transitions. [2021-11-25 20:32:03,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:32:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 47278 states and 69184 transitions. [2021-11-25 20:32:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-25 20:32:03,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:03,478 INFO L514 BasicCegarLoop]: trace histogram [24, 17, 17, 17, 17, 17, 17, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:03,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 20:32:03,478 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:32:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash 152828271, now seen corresponding path program 1 times [2021-11-25 20:32:03,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:03,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607293656] [2021-11-25 20:32:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:03,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-25 20:32:03,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607293656] [2021-11-25 20:32:03,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607293656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:03,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:03,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:32:03,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077708670] [2021-11-25 20:32:03,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:03,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:32:03,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:32:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:32:03,778 INFO L87 Difference]: Start difference. First operand 47278 states and 69184 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:32:06,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:10,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:12,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:16,871 INFO L93 Difference]: Finished difference Result 97908 states and 143254 transitions. [2021-11-25 20:32:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 292 [2021-11-25 20:32:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:17,069 INFO L225 Difference]: With dead ends: 97908 [2021-11-25 20:32:17,069 INFO L226 Difference]: Without dead ends: 51562 [2021-11-25 20:32:17,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:32:17,343 INFO L933 BasicCegarLoop]: 3227 mSDtfsCounter, 1717 mSDsluCounter, 9231 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 11364 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:17,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 11364 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1677 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2021-11-25 20:32:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51562 states.