./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:48:25,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:48:25,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:48:25,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:48:25,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:48:25,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:48:25,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:48:25,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:48:25,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:48:25,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:48:25,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:48:25,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:48:25,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:48:25,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:48:25,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:48:25,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:48:25,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:48:25,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:48:25,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:48:25,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:48:25,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:48:25,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:48:25,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:48:25,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:48:25,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:48:25,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:48:25,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:48:25,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:48:25,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:48:25,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:48:25,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:48:25,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:48:25,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:48:25,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:48:25,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:48:25,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:48:25,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:48:25,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:48:25,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:48:25,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:48:25,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:48:25,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:48:25,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:48:25,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:48:25,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:48:25,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:48:25,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:48:25,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:48:25,900 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:48:25,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:48:25,900 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:48:25,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:48:25,901 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:48:25,901 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:48:25,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:48:25,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:48:25,902 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:48:25,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:48:25,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:48:25,903 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:48:25,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:48:25,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:48:25,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:48:25,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:48:25,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:48:25,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:48:25,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:48:25,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:48:25,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:48:25,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:48:25,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:48:25,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:25,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:48:25,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:48:25,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:48:25,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:48:25,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:48:25,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:48:25,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:48:25,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:48:25,908 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24362a0e750636c52038fc4d3468ffab15d6b74376c584ca05819f34fdf58260 [2021-11-23 02:48:26,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:48:26,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:48:26,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:48:26,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:48:26,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:48:26,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-23 02:48:26,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/data/6c97e3469/cc8fc6970e9244d282876e1be4e6a583/FLAG9f1f3a3e2 [2021-11-23 02:48:27,279 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:48:27,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-23 02:48:27,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/data/6c97e3469/cc8fc6970e9244d282876e1be4e6a583/FLAG9f1f3a3e2 [2021-11-23 02:48:27,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/data/6c97e3469/cc8fc6970e9244d282876e1be4e6a583 [2021-11-23 02:48:27,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:48:27,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:48:27,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:27,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:48:27,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:48:27,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:27" (1/1) ... [2021-11-23 02:48:27,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30126d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:27, skipping insertion in model container [2021-11-23 02:48:27,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:27" (1/1) ... [2021-11-23 02:48:27,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:48:27,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:48:30,948 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-23 02:48:30,951 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-23 02:48:30,952 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-23 02:48:30,952 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-23 02:48:30,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:31,048 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:48:31,554 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359515,359528] [2021-11-23 02:48:31,555 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359684,359697] [2021-11-23 02:48:31,556 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[359851,359864] [2021-11-23 02:48:31,556 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_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i[360019,360032] [2021-11-23 02:48:31,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:31,823 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:48:31,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31 WrapperNode [2021-11-23 02:48:31,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:31,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:31,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:48:31,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:48:31,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:31,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,237 INFO L137 Inliner]: procedures = 390, calls = 3756, calls flagged for inlining = 180, calls inlined = 163, statements flattened = 7743 [2021-11-23 02:48:32,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:32,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:48:32,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:48:32,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:48:32,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:48:32,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:48:32,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:48:32,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:48:32,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (1/1) ... [2021-11-23 02:48:32,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:32,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:48:32,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77530ab7-23c0-4e08-92b0-4eb47f62f5c8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:48:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg_nopm [2021-11-23 02:48:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg_nopm [2021-11-23 02:48:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:48:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:48:32,740 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_nway_reset [2021-11-23 02:48:32,740 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_nway_reset [2021-11-23 02:48:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:48:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:48:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure smsc_crc [2021-11-23 02:48:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc_crc [2021-11-23 02:48:32,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:48:32,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:48:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:48:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-23 02:48:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-23 02:48:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enable_phy_wakeup_interrupts [2021-11-23 02:48:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_reset [2021-11-23 02:48:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_reset [2021-11-23 02:48:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_eeprom [2021-11-23 02:48:32,743 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_eeprom [2021-11-23 02:48:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_write [2021-11-23 02:48:32,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_write [2021-11-23 02:48:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:48:32,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:48:32,743 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd_nopm [2021-11-23 02:48:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:48:32,744 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:48:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_rx_csum_offload [2021-11-23 02:48:32,744 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_rx_csum_offload [2021-11-23 02:48:32,744 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:48:32,744 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:48:32,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:48:32,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:48:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:48:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_features [2021-11-23 02:48:32,746 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_features [2021-11-23 02:48:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:48:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2021-11-23 02:48:32,746 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2021-11-23 02:48:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:48:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:48:32,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:48:32,748 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_tx_timeout [2021-11-23 02:48:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_tx_timeout [2021-11-23 02:48:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read_nopm [2021-11-23 02:48:32,749 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read_nopm [2021-11-23 02:48:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:48:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:48:32,750 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:48:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_write_cmd [2021-11-23 02:48:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_phy_wait_not_busy [2021-11-23 02:48:32,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_phy_wait_not_busy [2021-11-23 02:48:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-23 02:48:32,750 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-23 02:48:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write [2021-11-23 02:48:32,751 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write [2021-11-23 02:48:32,751 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd_nopm [2021-11-23 02:48:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:48:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:48:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:48:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:48:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:48:32,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:48:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:48:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:48:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:48:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:48:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:48:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:48:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:48:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:48:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:48:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_open [2021-11-23 02:48:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_open [2021-11-23 02:48:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_read [2021-11-23 02:48:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_read [2021-11-23 02:48:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_rx_max_frame_length [2021-11-23 02:48:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_rx_max_frame_length [2021-11-23 02:48:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:48:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:48:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:48:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:48:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_read_reg [2021-11-23 02:48:32,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_read_reg [2021-11-23 02:48:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 02:48:32,758 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 02:48:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:48:32,759 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:48:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-23 02:48:32,759 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_ethtool_get_eeprom_len [2021-11-23 02:48:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:48:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:48:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:48:32,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:48:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-23 02:48:32,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_smsc75xx_driver_exit_6_2 [2021-11-23 02:48:32,760 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-23 02:48:32,760 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-23 02:48:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:48:32,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:48:32,761 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 [2021-11-23 02:48:32,761 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 [2021-11-23 02:48:32,761 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg [2021-11-23 02:48:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg [2021-11-23 02:48:32,762 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_stop [2021-11-23 02:48:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_stop [2021-11-23 02:48:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:48:32,766 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:48:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_mdio_write_nopm [2021-11-23 02:48:32,766 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_mdio_write_nopm [2021-11-23 02:48:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_set_multicast [2021-11-23 02:48:32,767 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_set_multicast [2021-11-23 02:48:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:48:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:48:32,767 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:48:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:48:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:48:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:48:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:48:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:48:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:48:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_mdio_read [2021-11-23 02:48:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_mdio_read [2021-11-23 02:48:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:48:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:48:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:48:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:48:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_reg_nopm [2021-11-23 02:48:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_reg_nopm [2021-11-23 02:48:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2021-11-23 02:48:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2021-11-23 02:48:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure __smsc75xx_write_reg [2021-11-23 02:48:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __smsc75xx_write_reg [2021-11-23 02:48:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-23 02:48:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-23 02:48:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_wait_ready [2021-11-23 02:48:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_wait_ready [2021-11-23 02:48:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:48:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-11-23 02:48:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-11-23 02:48:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_read_eeprom [2021-11-23 02:48:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_read_eeprom [2021-11-23 02:48:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:48:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:48:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_read_cmd [2021-11-23 02:48:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_link_reset [2021-11-23 02:48:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_link_reset [2021-11-23 02:48:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_resume [2021-11-23 02:48:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_resume [2021-11-23 02:48:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_wuff [2021-11-23 02:48:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_wuff [2021-11-23 02:48:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-23 02:48:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_eeprom_confirm_not_busy [2021-11-23 02:48:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:48:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:48:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend2 [2021-11-23 02:48:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend2 [2021-11-23 02:48:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_enter_suspend1 [2021-11-23 02:48:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_enter_suspend1 [2021-11-23 02:48:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure smsc75xx_write_reg [2021-11-23 02:48:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure smsc75xx_write_reg [2021-11-23 02:48:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:48:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-23 02:48:32,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_rfe_ctl_lock_of_smsc75xx_priv [2021-11-23 02:48:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:48:32,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:48:33,863 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:48:33,867 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:48:34,432 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:48:38,842 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:48:42,799 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:48:43,688 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:48:43,688 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:48:43,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:43 BoogieIcfgContainer [2021-11-23 02:48:43,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:48:43,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:48:43,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:48:43,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:48:43,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:48:27" (1/3) ... [2021-11-23 02:48:43,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:43, skipping insertion in model container [2021-11-23 02:48:43,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:31" (2/3) ... [2021-11-23 02:48:43,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341749e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:43, skipping insertion in model container [2021-11-23 02:48:43,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:43" (3/3) ... [2021-11-23 02:48:43,708 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-usb-smsc75xx.cil.i [2021-11-23 02:48:43,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:48:43,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:48:43,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:48:43,802 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:48:43,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:48:43,878 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) [2021-11-23 02:48:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:48:43,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:43,911 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] [2021-11-23 02:48:43,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:48:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1010905639, now seen corresponding path program 1 times [2021-11-23 02:48:43,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765995332] [2021-11-23 02:48:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:43,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2021-11-23 02:48:44,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:44,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765995332] [2021-11-23 02:48:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765995332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:44,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:44,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:44,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031902558] [2021-11-23 02:48:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:44,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:44,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:44,830 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) [2021-11-23 02:48:48,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:48,713 INFO L93 Difference]: Finished difference Result 3887 states and 5869 transitions. [2021-11-23 02:48:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:48,715 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 [2021-11-23 02:48:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:48,763 INFO L225 Difference]: With dead ends: 3887 [2021-11-23 02:48:48,763 INFO L226 Difference]: Without dead ends: 2565 [2021-11-23 02:48:48,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:48,789 INFO L933 BasicCegarLoop]: 2099 mSDtfsCounter, 1869 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:48,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1869 Valid, 3811 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 535 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 02:48:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-11-23 02:48:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2561. [2021-11-23 02:48:49,087 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) [2021-11-23 02:48:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3822 transitions. [2021-11-23 02:48:49,114 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3822 transitions. Word has length 194 [2021-11-23 02:48:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:49,116 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3822 transitions. [2021-11-23 02:48:49,117 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) [2021-11-23 02:48:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3822 transitions. [2021-11-23 02:48:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-23 02:48:49,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:49,124 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] [2021-11-23 02:48:49,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:48:49,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:48:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1324102734, now seen corresponding path program 1 times [2021-11-23 02:48:49,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:49,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731521190] [2021-11-23 02:48:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:49,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-23 02:48:49,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731521190] [2021-11-23 02:48:49,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731521190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:49,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:49,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:48:49,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289359848] [2021-11-23 02:48:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:49,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:48:49,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:48:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:49,528 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) [2021-11-23 02:48:51,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:52,920 INFO L93 Difference]: Finished difference Result 7243 states and 10774 transitions. [2021-11-23 02:48:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:48:52,921 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 [2021-11-23 02:48:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:52,968 INFO L225 Difference]: With dead ends: 7243 [2021-11-23 02:48:52,969 INFO L226 Difference]: Without dead ends: 4717 [2021-11-23 02:48:52,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:48:52,987 INFO L933 BasicCegarLoop]: 2446 mSDtfsCounter, 1624 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 4138 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:52,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 4138 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 593 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:48:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-11-23 02:48:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 4690. [2021-11-23 02:48:53,310 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, (1352), 1347 states have call predecessors, (1352), 1352 states have call successors, (1352) [2021-11-23 02:48:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6959 transitions. [2021-11-23 02:48:53,363 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6959 transitions. Word has length 203 [2021-11-23 02:48:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:53,364 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 6959 transitions. [2021-11-23 02:48:53,365 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) [2021-11-23 02:48:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6959 transitions. [2021-11-23 02:48:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 02:48:53,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:53,373 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] [2021-11-23 02:48:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:48:53,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:48:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 511305150, now seen corresponding path program 1 times [2021-11-23 02:48:53,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:53,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221353102] [2021-11-23 02:48:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:53,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1270 trivial. 0 not checked. [2021-11-23 02:48:53,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221353102] [2021-11-23 02:48:53,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221353102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:53,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:53,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:53,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9471268] [2021-11-23 02:48:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:53,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:53,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:53,902 INFO L87 Difference]: Start difference. First operand 4690 states and 6959 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) [2021-11-23 02:48:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:57,143 INFO L93 Difference]: Finished difference Result 4696 states and 6964 transitions. [2021-11-23 02:48:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:48:57,144 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 [2021-11-23 02:48:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:57,190 INFO L225 Difference]: With dead ends: 4696 [2021-11-23 02:48:57,190 INFO L226 Difference]: Without dead ends: 4694 [2021-11-23 02:48:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:57,199 INFO L933 BasicCegarLoop]: 1727 mSDtfsCounter, 1920 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 5168 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 [2021-11-23 02:48:57,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1931 Valid, 5168 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:48:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-11-23 02:48:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4694. [2021-11-23 02:48:57,512 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, (1352), 1347 states have call predecessors, (1352), 1352 states have call successors, (1352) [2021-11-23 02:48:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6962 transitions. [2021-11-23 02:48:57,550 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6962 transitions. Word has length 238 [2021-11-23 02:48:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:57,552 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 6962 transitions. [2021-11-23 02:48:57,553 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) [2021-11-23 02:48:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6962 transitions. [2021-11-23 02:48:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-23 02:48:57,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:57,565 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 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] [2021-11-23 02:48:57,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:48:57,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:48:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash -830358297, now seen corresponding path program 1 times [2021-11-23 02:48:57,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:57,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450996105] [2021-11-23 02:48:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:57,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1270 trivial. 0 not checked. [2021-11-23 02:48:58,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450996105] [2021-11-23 02:48:58,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450996105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:58,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:58,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:58,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259852863] [2021-11-23 02:48:58,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:58,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:58,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:58,044 INFO L87 Difference]: Start difference. First operand 4694 states and 6962 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) [2021-11-23 02:49:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:01,301 INFO L93 Difference]: Finished difference Result 4700 states and 6967 transitions. [2021-11-23 02:49:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:01,302 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 243 [2021-11-23 02:49:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:01,351 INFO L225 Difference]: With dead ends: 4700 [2021-11-23 02:49:01,351 INFO L226 Difference]: Without dead ends: 4698 [2021-11-23 02:49:01,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:01,360 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:01,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:49:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-23 02:49:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4698. [2021-11-23 02:49:01,709 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, (1352), 1347 states have call predecessors, (1352), 1352 states have call successors, (1352) [2021-11-23 02:49:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 6965 transitions. [2021-11-23 02:49:01,757 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 6965 transitions. Word has length 243 [2021-11-23 02:49:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:01,762 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 6965 transitions. [2021-11-23 02:49:01,764 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) [2021-11-23 02:49:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 6965 transitions. [2021-11-23 02:49:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 02:49:01,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:01,777 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:49:01,778 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1737182392, now seen corresponding path program 1 times [2021-11-23 02:49:01,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:01,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505993089] [2021-11-23 02:49:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:01,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2021-11-23 02:49:02,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505993089] [2021-11-23 02:49:02,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505993089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:02,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:02,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:02,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198174806] [2021-11-23 02:49:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:02,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:02,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:02,186 INFO L87 Difference]: Start difference. First operand 4698 states and 6965 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) [2021-11-23 02:49:04,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:08,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:09,020 INFO L93 Difference]: Finished difference Result 8125 states and 12025 transitions. [2021-11-23 02:49:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:49:09,021 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 249 [2021-11-23 02:49:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:09,087 INFO L225 Difference]: With dead ends: 8125 [2021-11-23 02:49:09,087 INFO L226 Difference]: Without dead ends: 8123 [2021-11-23 02:49:09,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:09,093 INFO L933 BasicCegarLoop]: 2643 mSDtfsCounter, 1886 mSDsluCounter, 7922 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 9590 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:09,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 9590 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1355 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-23 02:49:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2021-11-23 02:49:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 8117. [2021-11-23 02:49:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 5295 states have (on average 1.3854579792256847) internal successors, (7336), 5313 states have internal predecessors, (7336), 2346 states have call successors, (2346), 475 states have call predecessors, (2346), 473 states have return successors, (2338), 2328 states have call predecessors, (2338), 2338 states have call successors, (2338) [2021-11-23 02:49:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 12020 transitions. [2021-11-23 02:49:09,593 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 12020 transitions. Word has length 249 [2021-11-23 02:49:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:09,594 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 12020 transitions. [2021-11-23 02:49:09,594 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) [2021-11-23 02:49:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 12020 transitions. [2021-11-23 02:49:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-23 02:49:09,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:09,607 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] [2021-11-23 02:49:09,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:49:09,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1038311673, now seen corresponding path program 1 times [2021-11-23 02:49:09,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:09,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680203718] [2021-11-23 02:49:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:09,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2021-11-23 02:49:09,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680203718] [2021-11-23 02:49:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680203718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:09,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:09,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:09,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436112107] [2021-11-23 02:49:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:09,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:09,948 INFO L87 Difference]: Start difference. First operand 8117 states and 12020 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) [2021-11-23 02:49:11,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:13,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:14,470 INFO L93 Difference]: Finished difference Result 8127 states and 12029 transitions. [2021-11-23 02:49:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:14,471 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 [2021-11-23 02:49:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:14,535 INFO L225 Difference]: With dead ends: 8127 [2021-11-23 02:49:14,536 INFO L226 Difference]: Without dead ends: 8125 [2021-11-23 02:49:14,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:14,543 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 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, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:14,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 02:49:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8125 states. [2021-11-23 02:49:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8125 to 8125. [2021-11-23 02:49:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8125 states, 5301 states have (on average 1.3850216940199962) internal successors, (7342), 5319 states have internal predecessors, (7342), 2346 states have call successors, (2346), 477 states have call predecessors, (2346), 475 states have return successors, (2338), 2328 states have call predecessors, (2338), 2338 states have call successors, (2338) [2021-11-23 02:49:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8125 states to 8125 states and 12026 transitions. [2021-11-23 02:49:15,104 INFO L78 Accepts]: Start accepts. Automaton has 8125 states and 12026 transitions. Word has length 253 [2021-11-23 02:49:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:15,106 INFO L470 AbstractCegarLoop]: Abstraction has 8125 states and 12026 transitions. [2021-11-23 02:49:15,106 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) [2021-11-23 02:49:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8125 states and 12026 transitions. [2021-11-23 02:49:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 02:49:15,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:15,124 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] [2021-11-23 02:49:15,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:49:15,125 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)] === [2021-11-23 02:49:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1818185699, now seen corresponding path program 1 times [2021-11-23 02:49:15,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:15,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108442022] [2021-11-23 02:49:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:15,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2021-11-23 02:49:15,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108442022] [2021-11-23 02:49:15,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108442022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:15,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:15,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:49:15,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330258825] [2021-11-23 02:49:15,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:15,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:15,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:15,372 INFO L87 Difference]: Start difference. First operand 8125 states and 12026 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) [2021-11-23 02:49:18,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:19,493 INFO L93 Difference]: Finished difference Result 17926 states and 26537 transitions. [2021-11-23 02:49:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:19,494 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 [2021-11-23 02:49:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:19,548 INFO L225 Difference]: With dead ends: 17926 [2021-11-23 02:49:19,548 INFO L226 Difference]: Without dead ends: 9836 [2021-11-23 02:49:19,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:19,590 INFO L933 BasicCegarLoop]: 2073 mSDtfsCounter, 1659 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:19,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 3785 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 538 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:49:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-11-23 02:49:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9756. [2021-11-23 02:49:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9756 states, 6333 states have (on average 1.3851255329227854) internal successors, (8772), 6375 states have internal predecessors, (8772), 2841 states have call successors, (2841), 581 states have call predecessors, (2841), 579 states have return successors, (2833), 2799 states have call predecessors, (2833), 2833 states have call successors, (2833) [2021-11-23 02:49:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9756 states to 9756 states and 14446 transitions. [2021-11-23 02:49:20,187 INFO L78 Accepts]: Start accepts. Automaton has 9756 states and 14446 transitions. Word has length 250 [2021-11-23 02:49:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:20,188 INFO L470 AbstractCegarLoop]: Abstraction has 9756 states and 14446 transitions. [2021-11-23 02:49:20,188 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) [2021-11-23 02:49:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9756 states and 14446 transitions. [2021-11-23 02:49:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-23 02:49:20,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:20,199 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:20,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:49:20,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2060146648, now seen corresponding path program 1 times [2021-11-23 02:49:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403706002] [2021-11-23 02:49:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:20,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1295 trivial. 0 not checked. [2021-11-23 02:49:20,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:20,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403706002] [2021-11-23 02:49:20,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403706002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:20,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:20,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:20,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604592559] [2021-11-23 02:49:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:20,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:20,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:20,498 INFO L87 Difference]: Start difference. First operand 9756 states and 14446 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) [2021-11-23 02:49:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:22,859 INFO L93 Difference]: Finished difference Result 9766 states and 14455 transitions. [2021-11-23 02:49:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:22,859 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 259 [2021-11-23 02:49:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:22,905 INFO L225 Difference]: With dead ends: 9766 [2021-11-23 02:49:22,905 INFO L226 Difference]: Without dead ends: 9764 [2021-11-23 02:49:22,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:22,912 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:22,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:49:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-11-23 02:49:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9764. [2021-11-23 02:49:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 6339 states have (on average 1.3847610033128253) internal successors, (8778), 6381 states have internal predecessors, (8778), 2841 states have call successors, (2841), 583 states have call predecessors, (2841), 581 states have return successors, (2833), 2799 states have call predecessors, (2833), 2833 states have call successors, (2833) [2021-11-23 02:49:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 14452 transitions. [2021-11-23 02:49:23,453 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 14452 transitions. Word has length 259 [2021-11-23 02:49:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:23,454 INFO L470 AbstractCegarLoop]: Abstraction has 9764 states and 14452 transitions. [2021-11-23 02:49:23,454 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) [2021-11-23 02:49:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 14452 transitions. [2021-11-23 02:49:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 02:49:23,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:23,465 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] [2021-11-23 02:49:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:49:23,465 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 434896656, now seen corresponding path program 1 times [2021-11-23 02:49:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409430033] [2021-11-23 02:49:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:23,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2021-11-23 02:49:23,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409430033] [2021-11-23 02:49:23,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409430033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:23,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:23,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:23,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677767682] [2021-11-23 02:49:23,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:23,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:23,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:23,813 INFO L87 Difference]: Start difference. First operand 9764 states and 14452 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) [2021-11-23 02:49:26,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:27,316 INFO L93 Difference]: Finished difference Result 9774 states and 14461 transitions. [2021-11-23 02:49:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:27,317 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 [2021-11-23 02:49:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:27,363 INFO L225 Difference]: With dead ends: 9774 [2021-11-23 02:49:27,364 INFO L226 Difference]: Without dead ends: 9772 [2021-11-23 02:49:27,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:27,371 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 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 [2021-11-23 02:49:27,372 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] [2021-11-23 02:49:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2021-11-23 02:49:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 9772. [2021-11-23 02:49:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 6345 states have (on average 1.3843971631205674) internal successors, (8784), 6387 states have internal predecessors, (8784), 2841 states have call successors, (2841), 585 states have call predecessors, (2841), 583 states have return successors, (2833), 2799 states have call predecessors, (2833), 2833 states have call successors, (2833) [2021-11-23 02:49:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 14458 transitions. [2021-11-23 02:49:28,018 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 14458 transitions. Word has length 262 [2021-11-23 02:49:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 9772 states and 14458 transitions. [2021-11-23 02:49:28,019 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) [2021-11-23 02:49:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 14458 transitions. [2021-11-23 02:49:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-23 02:49:28,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:28,032 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 7, 6, 6, 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] [2021-11-23 02:49:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:49:28,033 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2083178974, now seen corresponding path program 1 times [2021-11-23 02:49:28,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551543956] [2021-11-23 02:49:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:28,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1342 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2021-11-23 02:49:28,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551543956] [2021-11-23 02:49:28,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551543956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:28,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:28,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:28,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36726880] [2021-11-23 02:49:28,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:28,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:28,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:28,345 INFO L87 Difference]: Start difference. First operand 9772 states and 14458 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) [2021-11-23 02:49:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:31,354 INFO L93 Difference]: Finished difference Result 9782 states and 14467 transitions. [2021-11-23 02:49:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:31,354 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 268 [2021-11-23 02:49:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:31,401 INFO L225 Difference]: With dead ends: 9782 [2021-11-23 02:49:31,401 INFO L226 Difference]: Without dead ends: 9780 [2021-11-23 02:49:31,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:31,409 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:31,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:49:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9780 states. [2021-11-23 02:49:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9780 to 9780. [2021-11-23 02:49:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9780 states, 6351 states have (on average 1.3840340103920643) internal successors, (8790), 6393 states have internal predecessors, (8790), 2841 states have call successors, (2841), 587 states have call predecessors, (2841), 585 states have return successors, (2833), 2799 states have call predecessors, (2833), 2833 states have call successors, (2833) [2021-11-23 02:49:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9780 states to 9780 states and 14464 transitions. [2021-11-23 02:49:32,039 INFO L78 Accepts]: Start accepts. Automaton has 9780 states and 14464 transitions. Word has length 268 [2021-11-23 02:49:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:32,040 INFO L470 AbstractCegarLoop]: Abstraction has 9780 states and 14464 transitions. [2021-11-23 02:49:32,040 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) [2021-11-23 02:49:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9780 states and 14464 transitions. [2021-11-23 02:49:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 02:49:32,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:32,054 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] [2021-11-23 02:49:32,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:49:32,054 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:49:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash 160231278, now seen corresponding path program 1 times [2021-11-23 02:49:32,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71716265] [2021-11-23 02:49:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:32,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-11-23 02:49:32,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:32,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71716265] [2021-11-23 02:49:32,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71716265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:32,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:32,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:49:32,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890471523] [2021-11-23 02:49:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:32,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:32,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:32,265 INFO L87 Difference]: Start difference. First operand 9780 states and 14464 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) [2021-11-23 02:49:34,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:36,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:37,166 INFO L93 Difference]: Finished difference Result 22955 states and 33938 transitions. [2021-11-23 02:49:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:37,166 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 [2021-11-23 02:49:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:37,246 INFO L225 Difference]: With dead ends: 22955 [2021-11-23 02:49:37,246 INFO L226 Difference]: Without dead ends: 14088 [2021-11-23 02:49:37,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:37,292 INFO L933 BasicCegarLoop]: 3252 mSDtfsCounter, 1762 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 4942 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:37,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 4942 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 02:49:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14088 states. [2021-11-23 02:49:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14088 to 13984. [2021-11-23 02:49:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13984 states, 9096 states have (on average 1.3866534740545295) internal successors, (12613), 9162 states have internal predecessors, (12613), 4044 states have call successors, (4044), 843 states have call predecessors, (4044), 841 states have return successors, (4036), 3978 states have call predecessors, (4036), 4036 states have call successors, (4036) [2021-11-23 02:49:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13984 states to 13984 states and 20693 transitions. [2021-11-23 02:49:38,234 INFO L78 Accepts]: Start accepts. Automaton has 13984 states and 20693 transitions. Word has length 263 [2021-11-23 02:49:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:38,235 INFO L470 AbstractCegarLoop]: Abstraction has 13984 states and 20693 transitions. [2021-11-23 02:49:38,236 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) [2021-11-23 02:49:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13984 states and 20693 transitions. [2021-11-23 02:49:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 02:49:38,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:38,249 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:38,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:49:38,250 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)] === [2021-11-23 02:49:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -480740771, now seen corresponding path program 1 times [2021-11-23 02:49:38,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306857158] [2021-11-23 02:49:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:38,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2021-11-23 02:49:38,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306857158] [2021-11-23 02:49:38,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306857158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:38,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:38,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:38,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165820885] [2021-11-23 02:49:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:38,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:38,524 INFO L87 Difference]: Start difference. First operand 13984 states and 20693 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, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:49:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:41,242 INFO L93 Difference]: Finished difference Result 13994 states and 20702 transitions. [2021-11-23 02:49:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:41,242 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, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 274 [2021-11-23 02:49:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:41,307 INFO L225 Difference]: With dead ends: 13994 [2021-11-23 02:49:41,307 INFO L226 Difference]: Without dead ends: 13992 [2021-11-23 02:49:41,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:41,315 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 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 [2021-11-23 02:49:41,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:49:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-11-23 02:49:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 13992. [2021-11-23 02:49:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13992 states, 9102 states have (on average 1.3863985937156669) internal successors, (12619), 9168 states have internal predecessors, (12619), 4044 states have call successors, (4044), 845 states have call predecessors, (4044), 843 states have return successors, (4036), 3978 states have call predecessors, (4036), 4036 states have call successors, (4036) [2021-11-23 02:49:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13992 states to 13992 states and 20699 transitions. [2021-11-23 02:49:42,292 INFO L78 Accepts]: Start accepts. Automaton has 13992 states and 20699 transitions. Word has length 274 [2021-11-23 02:49:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:42,293 INFO L470 AbstractCegarLoop]: Abstraction has 13992 states and 20699 transitions. [2021-11-23 02:49:42,293 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, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:49:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 13992 states and 20699 transitions. [2021-11-23 02:49:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-23 02:49:42,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:42,310 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] [2021-11-23 02:49:42,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:49:42,310 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)] === [2021-11-23 02:49:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash 29219304, now seen corresponding path program 1 times [2021-11-23 02:49:42,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:42,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376375317] [2021-11-23 02:49:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2021-11-23 02:49:42,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376375317] [2021-11-23 02:49:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376375317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:42,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:42,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:42,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188829711] [2021-11-23 02:49:42,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:42,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:42,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:42,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:42,614 INFO L87 Difference]: Start difference. First operand 13992 states and 20699 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) [2021-11-23 02:49:44,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:46,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:47,701 INFO L93 Difference]: Finished difference Result 14002 states and 20708 transitions. [2021-11-23 02:49:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:47,701 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 [2021-11-23 02:49:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:47,760 INFO L225 Difference]: With dead ends: 14002 [2021-11-23 02:49:47,760 INFO L226 Difference]: Without dead ends: 14000 [2021-11-23 02:49:47,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:47,772 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1915 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:47,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 786 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 02:49:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-11-23 02:49:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 14000. [2021-11-23 02:49:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14000 states, 9108 states have (on average 1.3861440491875274) internal successors, (12625), 9174 states have internal predecessors, (12625), 4044 states have call successors, (4044), 847 states have call predecessors, (4044), 845 states have return successors, (4036), 3978 states have call predecessors, (4036), 4036 states have call successors, (4036) [2021-11-23 02:49:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14000 states to 14000 states and 20705 transitions. [2021-11-23 02:49:48,814 INFO L78 Accepts]: Start accepts. Automaton has 14000 states and 20705 transitions. Word has length 279 [2021-11-23 02:49:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 14000 states and 20705 transitions. [2021-11-23 02:49:48,815 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) [2021-11-23 02:49:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14000 states and 20705 transitions. [2021-11-23 02:49:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-23 02:49:48,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:48,829 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 17, 17, 17, 17, 17, 10, 9, 9, 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] [2021-11-23 02:49:48,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:49:48,829 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)] === [2021-11-23 02:49:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1639549593, now seen corresponding path program 1 times [2021-11-23 02:49:48,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:48,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001275090] [2021-11-23 02:49:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:48,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1414 trivial. 0 not checked. [2021-11-23 02:49:49,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001275090] [2021-11-23 02:49:49,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001275090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:49,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:49,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:49,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173949761] [2021-11-23 02:49:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:49,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:49,082 INFO L87 Difference]: Start difference. First operand 14000 states and 20705 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) [2021-11-23 02:49:53,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:54,521 INFO L93 Difference]: Finished difference Result 14075 states and 20753 transitions. [2021-11-23 02:49:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:54,522 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 283 [2021-11-23 02:49:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:54,569 INFO L225 Difference]: With dead ends: 14075 [2021-11-23 02:49:54,569 INFO L226 Difference]: Without dead ends: 14073 [2021-11-23 02:49:54,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:54,576 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1858 mSDsluCounter, 4008 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 5219 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:54,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1860 Valid, 5219 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 794 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:49:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2021-11-23 02:49:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 14073. [2021-11-23 02:49:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 9153 states have (on average 1.384245602534688) internal successors, (12670), 9219 states have internal predecessors, (12670), 4044 states have call successors, (4044), 875 states have call predecessors, (4044), 873 states have return successors, (4036), 3978 states have call predecessors, (4036), 4036 states have call successors, (4036) [2021-11-23 02:49:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 20750 transitions. [2021-11-23 02:49:55,371 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 20750 transitions. Word has length 283 [2021-11-23 02:49:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:55,372 INFO L470 AbstractCegarLoop]: Abstraction has 14073 states and 20750 transitions. [2021-11-23 02:49:55,373 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) [2021-11-23 02:49:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 20750 transitions. [2021-11-23 02:49:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-23 02:49:55,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:55,391 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] [2021-11-23 02:49:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:49:55,391 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)] === [2021-11-23 02:49:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 500872917, now seen corresponding path program 1 times [2021-11-23 02:49:55,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958692268] [2021-11-23 02:49:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:55,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-23 02:49:55,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:55,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958692268] [2021-11-23 02:49:55,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958692268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:55,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:55,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:55,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382266434] [2021-11-23 02:49:55,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:55,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:55,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:55,657 INFO L87 Difference]: Start difference. First operand 14073 states and 20750 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) [2021-11-23 02:49:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:57,798 INFO L93 Difference]: Finished difference Result 14083 states and 20759 transitions. [2021-11-23 02:49:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:49:57,799 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 [2021-11-23 02:49:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:57,846 INFO L225 Difference]: With dead ends: 14083 [2021-11-23 02:49:57,847 INFO L226 Difference]: Without dead ends: 14079 [2021-11-23 02:49:57,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:49:57,859 INFO L933 BasicCegarLoop]: 1730 mSDtfsCounter, 1916 mSDsluCounter, 3953 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 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, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:57,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1917 Valid, 5171 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:49:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14079 states. [2021-11-23 02:49:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14079 to 14079. [2021-11-23 02:49:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14079 states, 9158 states have (on average 1.3839266215330859) internal successors, (12674), 9223 states have internal predecessors, (12674), 4044 states have call successors, (4044), 877 states have call predecessors, (4044), 874 states have return successors, (4036), 3978 states have call predecessors, (4036), 4036 states have call successors, (4036) [2021-11-23 02:49:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14079 states to 14079 states and 20754 transitions. [2021-11-23 02:49:58,854 INFO L78 Accepts]: Start accepts. Automaton has 14079 states and 20754 transitions. Word has length 287 [2021-11-23 02:49:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:58,855 INFO L470 AbstractCegarLoop]: Abstraction has 14079 states and 20754 transitions. [2021-11-23 02:49:58,855 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) [2021-11-23 02:49:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14079 states and 20754 transitions. [2021-11-23 02:49:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 02:49:58,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:58,876 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] [2021-11-23 02:49:58,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:49:58,876 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)] === [2021-11-23 02:49:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1557382474, now seen corresponding path program 1 times [2021-11-23 02:49:58,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:58,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615188748] [2021-11-23 02:49:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:58,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:49:59,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:59,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615188748] [2021-11-23 02:49:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615188748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:59,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:49:59,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027875709] [2021-11-23 02:49:59,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:59,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:49:59,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:49:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:49:59,147 INFO L87 Difference]: Start difference. First operand 14079 states and 20754 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) [2021-11-23 02:50:01,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:04,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:06,839 INFO L93 Difference]: Finished difference Result 31438 states and 46266 transitions. [2021-11-23 02:50:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:06,840 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 [2021-11-23 02:50:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:06,922 INFO L225 Difference]: With dead ends: 31438 [2021-11-23 02:50:06,922 INFO L226 Difference]: Without dead ends: 18277 [2021-11-23 02:50:06,978 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 [2021-11-23 02:50:06,979 INFO L933 BasicCegarLoop]: 3176 mSDtfsCounter, 1621 mSDsluCounter, 9109 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 11220 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:06,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1622 Valid, 11220 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1603 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:50:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18277 states. [2021-11-23 02:50:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18277 to 18135. [2021-11-23 02:50:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18135 states, 11770 states have (on average 1.3814783347493629) internal successors, (16260), 11859 states have internal predecessors, (16260), 5228 states have call successors, (5228), 1133 states have call predecessors, (5228), 1134 states have return successors, (5228), 5142 states have call predecessors, (5228), 5220 states have call successors, (5228) [2021-11-23 02:50:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18135 states to 18135 states and 26716 transitions. [2021-11-23 02:50:08,054 INFO L78 Accepts]: Start accepts. Automaton has 18135 states and 26716 transitions. Word has length 284 [2021-11-23 02:50:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:08,055 INFO L470 AbstractCegarLoop]: Abstraction has 18135 states and 26716 transitions. [2021-11-23 02:50:08,056 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) [2021-11-23 02:50:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18135 states and 26716 transitions. [2021-11-23 02:50:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-23 02:50:08,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:08,075 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] [2021-11-23 02:50:08,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:50:08,076 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)] === [2021-11-23 02:50:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 686726935, now seen corresponding path program 1 times [2021-11-23 02:50:08,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164761056] [2021-11-23 02:50:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:08,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:50:08,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164761056] [2021-11-23 02:50:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164761056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:08,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788773709] [2021-11-23 02:50:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:08,304 INFO L87 Difference]: Start difference. First operand 18135 states and 26716 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) [2021-11-23 02:50:10,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:11,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:14,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:17,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:19,233 INFO L93 Difference]: Finished difference Result 39558 states and 58206 transitions. [2021-11-23 02:50:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:19,234 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 [2021-11-23 02:50:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:19,329 INFO L225 Difference]: With dead ends: 39558 [2021-11-23 02:50:19,329 INFO L226 Difference]: Without dead ends: 22341 [2021-11-23 02:50:19,385 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 [2021-11-23 02:50:19,386 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 1620 mSDsluCounter, 9120 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 11235 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:19,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 11235 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1612 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 02:50:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22341 states. [2021-11-23 02:50:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22341 to 22199. [2021-11-23 02:50:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22199 states, 14390 states have (on average 1.3797081306462822) internal successors, (19854), 14503 states have internal predecessors, (19854), 6412 states have call successors, (6412), 1389 states have call predecessors, (6412), 1394 states have return successors, (6420), 6306 states have call predecessors, (6420), 6404 states have call successors, (6420) [2021-11-23 02:50:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22199 states to 22199 states and 32686 transitions. [2021-11-23 02:50:20,772 INFO L78 Accepts]: Start accepts. Automaton has 22199 states and 32686 transitions. Word has length 285 [2021-11-23 02:50:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:20,773 INFO L470 AbstractCegarLoop]: Abstraction has 22199 states and 32686 transitions. [2021-11-23 02:50:20,774 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) [2021-11-23 02:50:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 22199 states and 32686 transitions. [2021-11-23 02:50:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-23 02:50:20,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:20,795 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] [2021-11-23 02:50:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:50:20,795 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)] === [2021-11-23 02:50:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 159086471, now seen corresponding path program 1 times [2021-11-23 02:50:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697008483] [2021-11-23 02:50:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:20,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2021-11-23 02:50:21,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697008483] [2021-11-23 02:50:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697008483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:21,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:21,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:21,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367267507] [2021-11-23 02:50:21,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:21,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:21,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:21,080 INFO L87 Difference]: Start difference. First operand 22199 states and 32686 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) [2021-11-23 02:50:23,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:26,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:28,134 INFO L93 Difference]: Finished difference Result 22317 states and 32817 transitions. [2021-11-23 02:50:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:50:28,134 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 [2021-11-23 02:50:28,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:28,201 INFO L225 Difference]: With dead ends: 22317 [2021-11-23 02:50:28,201 INFO L226 Difference]: Without dead ends: 22164 [2021-11-23 02:50:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:50:28,213 INFO L933 BasicCegarLoop]: 2157 mSDtfsCounter, 1879 mSDsluCounter, 6751 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 8134 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:28,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1881 Valid, 8134 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1051 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-23 02:50:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22164 states. [2021-11-23 02:50:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22164 to 22150. [2021-11-23 02:50:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22150 states, 14393 states have (on average 1.3785173348155353) internal successors, (19841), 14484 states have internal predecessors, (19841), 6358 states have call successors, (6358), 1387 states have call predecessors, (6358), 1396 states have return successors, (6374), 6278 states have call predecessors, (6374), 6354 states have call successors, (6374) [2021-11-23 02:50:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22150 states to 22150 states and 32573 transitions. [2021-11-23 02:50:29,509 INFO L78 Accepts]: Start accepts. Automaton has 22150 states and 32573 transitions. Word has length 293 [2021-11-23 02:50:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 22150 states and 32573 transitions. [2021-11-23 02:50:29,511 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) [2021-11-23 02:50:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22150 states and 32573 transitions. [2021-11-23 02:50:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-23 02:50:29,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:29,529 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] [2021-11-23 02:50:29,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:50:29,530 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)] === [2021-11-23 02:50:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:29,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1497563314, now seen corresponding path program 1 times [2021-11-23 02:50:29,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:29,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072323573] [2021-11-23 02:50:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:29,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:50:29,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072323573] [2021-11-23 02:50:29,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072323573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:29,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:29,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:29,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420921549] [2021-11-23 02:50:29,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:29,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:29,758 INFO L87 Difference]: Start difference. First operand 22150 states and 32573 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) [2021-11-23 02:50:34,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:35,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:38,593 INFO L93 Difference]: Finished difference Result 47662 states and 70036 transitions. [2021-11-23 02:50:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:38,594 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 [2021-11-23 02:50:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:38,691 INFO L225 Difference]: With dead ends: 47662 [2021-11-23 02:50:38,691 INFO L226 Difference]: Without dead ends: 26444 [2021-11-23 02:50:38,742 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 [2021-11-23 02:50:38,743 INFO L933 BasicCegarLoop]: 3253 mSDtfsCounter, 1722 mSDsluCounter, 9284 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1722 SdHoareTripleChecker+Valid, 11441 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:38,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1722 Valid, 11441 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1664 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:50:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26444 states. [2021-11-23 02:50:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26444 to 26359. [2021-11-23 02:50:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26359 states, 17120 states have (on average 1.3769859813084113) internal successors, (23574), 17231 states have internal predecessors, (23574), 7563 states have call successors, (7563), 1660 states have call predecessors, (7563), 1673 states have return successors, (7583), 7467 states have call predecessors, (7583), 7559 states have call successors, (7583) [2021-11-23 02:50:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26359 states to 26359 states and 38720 transitions. [2021-11-23 02:50:40,289 INFO L78 Accepts]: Start accepts. Automaton has 26359 states and 38720 transitions. Word has length 286 [2021-11-23 02:50:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:40,290 INFO L470 AbstractCegarLoop]: Abstraction has 26359 states and 38720 transitions. [2021-11-23 02:50:40,291 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) [2021-11-23 02:50:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 26359 states and 38720 transitions. [2021-11-23 02:50:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-23 02:50:40,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:40,310 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] [2021-11-23 02:50:40,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:50:40,311 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)] === [2021-11-23 02:50:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:40,311 INFO L85 PathProgramCache]: Analyzing trace with hash 83969720, now seen corresponding path program 1 times [2021-11-23 02:50:40,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:40,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773983260] [2021-11-23 02:50:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:40,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:50:40,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773983260] [2021-11-23 02:50:40,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773983260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:40,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:40,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:40,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597447507] [2021-11-23 02:50:40,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:40,554 INFO L87 Difference]: Start difference. First operand 26359 states and 38720 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) [2021-11-23 02:50:42,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:44,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:49,083 INFO L93 Difference]: Finished difference Result 56021 states and 82254 transitions. [2021-11-23 02:50:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:50:49,083 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 [2021-11-23 02:50:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:49,193 INFO L225 Difference]: With dead ends: 56021 [2021-11-23 02:50:49,194 INFO L226 Difference]: Without dead ends: 30594 [2021-11-23 02:50:49,255 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 [2021-11-23 02:50:49,256 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 1713 mSDsluCounter, 9295 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 11455 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:49,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 11455 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1665 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 02:50:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30594 states. [2021-11-23 02:50:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30594 to 30509. [2021-11-23 02:50:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30509 states, 19809 states have (on average 1.3756878186682822) internal successors, (27251), 19940 states have internal predecessors, (27251), 8756 states have call successors, (8756), 1924 states have call predecessors, (8756), 1941 states have return successors, (8780), 8644 states have call predecessors, (8780), 8752 states have call successors, (8780) [2021-11-23 02:50:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30509 states to 30509 states and 44787 transitions. [2021-11-23 02:50:50,894 INFO L78 Accepts]: Start accepts. Automaton has 30509 states and 44787 transitions. Word has length 287 [2021-11-23 02:50:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 30509 states and 44787 transitions. [2021-11-23 02:50:50,896 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) [2021-11-23 02:50:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30509 states and 44787 transitions. [2021-11-23 02:50:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-23 02:50:50,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:50,907 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] [2021-11-23 02:50:50,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:50:50,907 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)] === [2021-11-23 02:50:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1220690256, now seen corresponding path program 1 times [2021-11-23 02:50:50,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:50,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397925410] [2021-11-23 02:50:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:50,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:50:51,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:51,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397925410] [2021-11-23 02:50:51,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397925410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:51,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:51,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:51,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397890013] [2021-11-23 02:50:51,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:51,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:51,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:51,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:51,139 INFO L87 Difference]: Start difference. First operand 30509 states and 44787 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) [2021-11-23 02:50:57,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:02,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:02,914 INFO L93 Difference]: Finished difference Result 64293 states and 94364 transitions. [2021-11-23 02:51:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:02,915 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 [2021-11-23 02:51:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:03,055 INFO L225 Difference]: With dead ends: 64293 [2021-11-23 02:51:03,055 INFO L226 Difference]: Without dead ends: 34716 [2021-11-23 02:51:03,121 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 [2021-11-23 02:51:03,122 INFO L933 BasicCegarLoop]: 3256 mSDtfsCounter, 1708 mSDsluCounter, 9297 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 11460 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:03,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 11460 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1666 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 02:51:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34716 states. [2021-11-23 02:51:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34716 to 34635. [2021-11-23 02:51:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34635 states, 22486 states have (on average 1.3747220492751044) internal successors, (30912), 22635 states have internal predecessors, (30912), 9943 states have call successors, (9943), 2182 states have call predecessors, (9943), 2203 states have return successors, (9975), 9817 states have call predecessors, (9975), 9939 states have call successors, (9975) [2021-11-23 02:51:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34635 states to 34635 states and 50830 transitions. [2021-11-23 02:51:05,009 INFO L78 Accepts]: Start accepts. Automaton has 34635 states and 50830 transitions. Word has length 288 [2021-11-23 02:51:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:05,009 INFO L470 AbstractCegarLoop]: Abstraction has 34635 states and 50830 transitions. [2021-11-23 02:51:05,009 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) [2021-11-23 02:51:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34635 states and 50830 transitions. [2021-11-23 02:51:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-23 02:51:05,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:05,022 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] [2021-11-23 02:51:05,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:51:05,022 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)] === [2021-11-23 02:51:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -404672234, now seen corresponding path program 1 times [2021-11-23 02:51:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587434117] [2021-11-23 02:51:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:05,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:51:05,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587434117] [2021-11-23 02:51:05,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587434117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:05,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:05,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:05,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730319141] [2021-11-23 02:51:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:05,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:05,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:05,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:05,246 INFO L87 Difference]: Start difference. First operand 34635 states and 50830 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) [2021-11-23 02:51:08,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:10,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:14,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:16,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:19,445 INFO L93 Difference]: Finished difference Result 72549 states and 106458 transitions. [2021-11-23 02:51:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:19,446 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 [2021-11-23 02:51:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:19,608 INFO L225 Difference]: With dead ends: 72549 [2021-11-23 02:51:19,608 INFO L226 Difference]: Without dead ends: 38846 [2021-11-23 02:51:19,675 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 [2021-11-23 02:51:19,676 INFO L933 BasicCegarLoop]: 3256 mSDtfsCounter, 1708 mSDsluCounter, 9293 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 11460 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:19,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 11460 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1663 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-23 02:51:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38846 states. [2021-11-23 02:51:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38846 to 38765. [2021-11-23 02:51:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38765 states, 25167 states have (on average 1.3739023324194382) internal successors, (34577), 25334 states have internal predecessors, (34577), 11130 states have call successors, (11130), 2440 states have call predecessors, (11130), 2465 states have return successors, (11170), 10990 states have call predecessors, (11170), 11126 states have call successors, (11170) [2021-11-23 02:51:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38765 states to 38765 states and 56877 transitions. [2021-11-23 02:51:21,877 INFO L78 Accepts]: Start accepts. Automaton has 38765 states and 56877 transitions. Word has length 289 [2021-11-23 02:51:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:21,877 INFO L470 AbstractCegarLoop]: Abstraction has 38765 states and 56877 transitions. [2021-11-23 02:51:21,878 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) [2021-11-23 02:51:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38765 states and 56877 transitions. [2021-11-23 02:51:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-23 02:51:21,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:21,896 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] [2021-11-23 02:51:21,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:51:21,897 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)] === [2021-11-23 02:51:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1063696321, now seen corresponding path program 1 times [2021-11-23 02:51:21,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:21,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122071185] [2021-11-23 02:51:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:21,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:51:22,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122071185] [2021-11-23 02:51:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122071185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:22,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:22,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:22,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421067976] [2021-11-23 02:51:22,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:22,164 INFO L87 Difference]: Start difference. First operand 38765 states and 56877 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) [2021-11-23 02:51:25,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:27,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:29,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:35,251 INFO L93 Difference]: Finished difference Result 80845 states and 118592 transitions. [2021-11-23 02:51:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:35,251 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 [2021-11-23 02:51:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:35,407 INFO L225 Difference]: With dead ends: 80845 [2021-11-23 02:51:35,407 INFO L226 Difference]: Without dead ends: 43012 [2021-11-23 02:51:35,492 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 [2021-11-23 02:51:35,493 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 1710 mSDsluCounter, 9297 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 11457 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:35,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 11457 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1674 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2021-11-23 02:51:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43012 states. [2021-11-23 02:51:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43012 to 42927. [2021-11-23 02:51:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42927 states, 27868 states have (on average 1.3731161188459882) internal successors, (38266), 28055 states have internal predecessors, (38266), 12323 states have call successors, (12323), 2704 states have call predecessors, (12323), 2733 states have return successors, (12367), 12167 states have call predecessors, (12367), 12319 states have call successors, (12367) [2021-11-23 02:51:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42927 states to 42927 states and 62956 transitions. [2021-11-23 02:51:38,040 INFO L78 Accepts]: Start accepts. Automaton has 42927 states and 62956 transitions. Word has length 290 [2021-11-23 02:51:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 42927 states and 62956 transitions. [2021-11-23 02:51:38,041 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) [2021-11-23 02:51:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42927 states and 62956 transitions. [2021-11-23 02:51:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-23 02:51:38,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:38,062 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] [2021-11-23 02:51:38,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:51:38,062 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)] === [2021-11-23 02:51:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1291195828, now seen corresponding path program 1 times [2021-11-23 02:51:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375514399] [2021-11-23 02:51:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:38,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:51:38,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375514399] [2021-11-23 02:51:38,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375514399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:38,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:38,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:38,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725982405] [2021-11-23 02:51:38,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:38,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:38,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:38,275 INFO L87 Difference]: Start difference. First operand 42927 states and 62956 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) [2021-11-23 02:51:40,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:44,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:47,332 INFO L93 Difference]: Finished difference Result 89081 states and 130639 transitions. [2021-11-23 02:51:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:47,332 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 [2021-11-23 02:51:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:47,526 INFO L225 Difference]: With dead ends: 89081 [2021-11-23 02:51:47,526 INFO L226 Difference]: Without dead ends: 47086 [2021-11-23 02:51:47,621 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 [2021-11-23 02:51:47,621 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 1623 mSDsluCounter, 9113 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 11230 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:47,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 11230 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1631 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:51:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47086 states. [2021-11-23 02:51:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47086 to 47005. [2021-11-23 02:51:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47005 states, 30516 states have (on average 1.3724603486695504) internal successors, (41882), 30721 states have internal predecessors, (41882), 13495 states have call successors, (13495), 2958 states have call predecessors, (13495), 2991 states have return successors, (13547), 13325 states have call predecessors, (13547), 13491 states have call successors, (13547) [2021-11-23 02:51:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47005 states to 47005 states and 68924 transitions. [2021-11-23 02:51:50,347 INFO L78 Accepts]: Start accepts. Automaton has 47005 states and 68924 transitions. Word has length 291 [2021-11-23 02:51:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 47005 states and 68924 transitions. [2021-11-23 02:51:50,348 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) [2021-11-23 02:51:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 47005 states and 68924 transitions. [2021-11-23 02:51:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-23 02:51:50,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:50,369 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] [2021-11-23 02:51:50,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:51:50,369 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)] === [2021-11-23 02:51:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash 152828271, now seen corresponding path program 1 times [2021-11-23 02:51:50,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:50,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817711779] [2021-11-23 02:51:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:50,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:51:50,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:50,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817711779] [2021-11-23 02:51:50,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817711779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:50,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:50,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:50,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326923652] [2021-11-23 02:51:50,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:50,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:50,586 INFO L87 Difference]: Start difference. First operand 47005 states and 68924 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) [2021-11-23 02:51:55,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:58,935 INFO L93 Difference]: Finished difference Result 97333 states and 142702 transitions. [2021-11-23 02:51:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:58,936 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 [2021-11-23 02:51:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:59,123 INFO L225 Difference]: With dead ends: 97333 [2021-11-23 02:51:59,123 INFO L226 Difference]: Without dead ends: 51260 [2021-11-23 02:51:59,222 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 [2021-11-23 02:51:59,223 INFO L933 BasicCegarLoop]: 3231 mSDtfsCounter, 1719 mSDsluCounter, 9241 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 11378 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:59,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 11378 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1679 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:51:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51260 states. [2021-11-23 02:52:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51260 to 51175. [2021-11-23 02:52:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51175 states, 33225 states have (on average 1.3718284424379232) internal successors, (45579), 33450 states have internal predecessors, (45579), 14688 states have call successors, (14688), 3222 states have call predecessors, (14688), 3259 states have return successors, (14744), 14502 states have call predecessors, (14744), 14684 states have call successors, (14744) [2021-11-23 02:52:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51175 states to 51175 states and 75011 transitions. [2021-11-23 02:52:01,899 INFO L78 Accepts]: Start accepts. Automaton has 51175 states and 75011 transitions. Word has length 292 [2021-11-23 02:52:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:01,899 INFO L470 AbstractCegarLoop]: Abstraction has 51175 states and 75011 transitions. [2021-11-23 02:52:01,899 INFO L471 AbstractCegarLoop]: INTERPOLANT 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) [2021-11-23 02:52:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 51175 states and 75011 transitions. [2021-11-23 02:52:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-23 02:52:01,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:01,925 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, 1] [2021-11-23 02:52:01,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:52:01,925 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 342791496, now seen corresponding path program 1 times [2021-11-23 02:52:01,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:01,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167186713] [2021-11-23 02:52:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:01,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2021-11-23 02:52:02,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167186713] [2021-11-23 02:52:02,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167186713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:02,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:02,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:02,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362980619] [2021-11-23 02:52:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:02,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:02,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:02,426 INFO L87 Difference]: Start difference. First operand 51175 states and 75011 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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) [2021-11-23 02:52:05,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:07,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:09,363 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 []