./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:30:13,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:30:13,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:30:13,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:30:13,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:30:13,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:30:13,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:30:13,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:30:13,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:30:13,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:30:13,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:30:13,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:30:13,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:30:13,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:30:13,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:30:13,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:30:13,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:30:13,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:30:13,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:30:13,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:30:13,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:30:13,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:30:13,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:30:13,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:30:13,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:30:13,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:30:13,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:30:13,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:30:13,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:30:13,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:30:13,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:30:13,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:30:13,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:30:13,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:30:13,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:30:13,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:30:13,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:30:13,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:30:13,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:30:13,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:30:13,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:30:13,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:30:13,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:30:13,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:30:13,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:30:13,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:30:13,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:30:13,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:30:13,999 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:30:13,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:30:14,000 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:30:14,000 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:30:14,000 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:30:14,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:30:14,001 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:30:14,001 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:30:14,001 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:30:14,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:30:14,002 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:30:14,002 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:30:14,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:30:14,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:30:14,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:30:14,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:30:14,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:30:14,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:30:14,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:30:14,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:30:14,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:30:14,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:30:14,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:30:14,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:14,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:30:14,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:30:14,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:30:14,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:30:14,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:30:14,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:30:14,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:30:14,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:30:14,007 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_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 141cc550f279b59aa80e553b6a405c5654c50ab0a30e94ad7616006c63d0c81e [2021-11-25 20:30:14,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:30:14,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:30:14,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:30:14,301 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:30:14,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:30:14,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-25 20:30:14,374 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/data/120a0b752/32b2c9af35024fb7bfcb4713816735c4/FLAG29f421f20 [2021-11-25 20:30:15,440 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:30:15,441 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-25 20:30:15,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/data/120a0b752/32b2c9af35024fb7bfcb4713816735c4/FLAG29f421f20 [2021-11-25 20:30:15,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/data/120a0b752/32b2c9af35024fb7bfcb4713816735c4 [2021-11-25 20:30:15,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:30:15,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:30:15,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:15,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:30:15,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:30:15,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:15" (1/1) ... [2021-11-25 20:30:15,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7bb195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:15, skipping insertion in model container [2021-11-25 20:30:15,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:15" (1/1) ... [2021-11-25 20:30:15,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:30:16,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:30:18,932 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2021-11-25 20:30:18,936 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2021-11-25 20:30:18,936 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2021-11-25 20:30:18,945 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2021-11-25 20:30:18,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:19,058 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:30:19,522 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322818,322831] [2021-11-25 20:30:19,522 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[322987,323000] [2021-11-25 20:30:19,523 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323154,323167] [2021-11-25 20:30:19,523 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_ee8abf0b-b500-4964-956b-76dd7010c92a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i[323322,323335] [2021-11-25 20:30:19,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:19,765 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:30:19,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19 WrapperNode [2021-11-25 20:30:19,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:19,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:19,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:30:19,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:30:19,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:19,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,176 INFO L137 Inliner]: procedures = 412, calls = 1826, calls flagged for inlining = 207, calls inlined = 191, statements flattened = 4587 [2021-11-25 20:30:20,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:20,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:30:20,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:30:20,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:30:20,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:30:20,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:30:20,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:30:20,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:30:20,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (1/1) ... [2021-11-25 20:30:20,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:30:20,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:30:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:30:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-25 20:30:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-25 20:30:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 20:30:20,501 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 20:30:20,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:30:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:30:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-25 20:30:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-25 20:30:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 20:30:20,502 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 20:30:20,502 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_close [2021-11-25 20:30:20,503 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_close [2021-11-25 20:30:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:30:20,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:30:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-25 20:30:20,503 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-25 20:30:20,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:30:20,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:30:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 20:30:20,504 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 20:30:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_hamachi_private [2021-11-25 20:30:20,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_hamachi_private [2021-11-25 20:30:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:30:20,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:30:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 20:30:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 20:30:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 20:30:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 20:30:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:30:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:30:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-25 20:30:20,506 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-25 20:30:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:30:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 20:30:20,506 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 20:30:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:30:20,506 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:30:20,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:30:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 20:30:20,507 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 20:30:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:30:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:30:20,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:30:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:30:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-25 20:30:20,508 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-25 20:30:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 20:30:20,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 20:30:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 20:30:20,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 20:30:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 20:30:20,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 20:30:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 20:30:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 20:30:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-25 20:30:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-25 20:30:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 20:30:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 20:30:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:30:20,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:30:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:30:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 20:30:20,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 20:30:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 20:30:20,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 20:30:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 20:30:20,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 20:30:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:30:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:30:20,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:30:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 20:30:20,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 20:30:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:30:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:30:20,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:30:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:30:20,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:30:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_hamachi_private [2021-11-25 20:30:20,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_hamachi_private [2021-11-25 20:30:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 20:30:20,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 20:30:20,513 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 20:30:20,514 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 20:30:20,514 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-25 20:30:20,515 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-25 20:30:20,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 20:30:20,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 20:30:20,516 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 20:30:20,516 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 20:30:20,516 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-25 20:30:20,516 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-25 20:30:20,516 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-25 20:30:20,517 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-25 20:30:20,517 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_nway_reset [2021-11-25 20:30:20,517 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_nway_reset [2021-11-25 20:30:20,517 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-25 20:30:20,517 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-25 20:30:20,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:30:20,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:30:20,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:30:20,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:30:20,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:30:20,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:30:20,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:30:20,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:30:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2021-11-25 20:30:20,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_hamachi_exit_15_2 [2021-11-25 20:30:20,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 20:30:20,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 20:30:20,523 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-25 20:30:20,524 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-25 20:30:20,524 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_open [2021-11-25 20:30:20,524 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_open [2021-11-25 20:30:20,524 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 20:30:20,525 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 20:30:20,531 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-25 20:30:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-25 20:30:20,532 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 20:30:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 20:30:20,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:30:20,532 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 20:30:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 20:30:20,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:30:20,532 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-25 20:30:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-25 20:30:20,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:30:20,533 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-25 20:30:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-25 20:30:20,533 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-25 20:30:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-25 20:30:20,533 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:30:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:30:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_68 [2021-11-25 20:30:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_68 [2021-11-25 20:30:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:30:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:30:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-25 20:30:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-25 20:30:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:30:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:30:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:30:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:30:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_remove_one [2021-11-25 20:30:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_remove_one [2021-11-25 20:30:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:30:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:30:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:30:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_69 [2021-11-25 20:30:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_69 [2021-11-25 20:30:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-25 20:30:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-25 20:30:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-25 20:30:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-25 20:30:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:30:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:30:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-25 20:30:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-25 20:30:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-25 20:30:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-25 20:30:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:30:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_timer [2021-11-25 20:30:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_timer [2021-11-25 20:30:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:30:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:30:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-25 20:30:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-25 20:30:21,390 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:30:21,394 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:30:21,624 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:30:24,531 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 20:30:24,588 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:30:25,612 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:30:25,612 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:30:25,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:30:25 BoogieIcfgContainer [2021-11-25 20:30:25,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:30:25,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:30:25,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:30:25,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:30:25,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:30:15" (1/3) ... [2021-11-25 20:30:25,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aedf818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:30:25, skipping insertion in model container [2021-11-25 20:30:25,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:19" (2/3) ... [2021-11-25 20:30:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aedf818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:30:25, skipping insertion in model container [2021-11-25 20:30:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:30:25" (3/3) ... [2021-11-25 20:30:25,628 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-packetengines-hamachi.cil.i [2021-11-25 20:30:25,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:30:25,634 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 20:30:25,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:30:25,718 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:30:25,722 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 20:30:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) [2021-11-25 20:30:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 20:30:25,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:25,809 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:30:25,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2014580670, now seen corresponding path program 1 times [2021-11-25 20:30:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64209530] [2021-11-25 20:30:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:25,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-25 20:30:26,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:26,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64209530] [2021-11-25 20:30:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64209530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:26,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:26,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:30:26,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877191402] [2021-11-25 20:30:26,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:26,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:30:26,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:30:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:26,617 INFO L87 Difference]: Start difference. First operand has 1131 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 684 states have internal predecessors, (873), 397 states have call successors, (397), 75 states have call predecessors, (397), 74 states have return successors, (390), 377 states have call predecessors, (390), 390 states have call successors, (390) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:30:30,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:30,256 INFO L93 Difference]: Finished difference Result 3213 states and 4751 transitions. [2021-11-25 20:30:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:30:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 114 [2021-11-25 20:30:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:30,290 INFO L225 Difference]: With dead ends: 3213 [2021-11-25 20:30:30,290 INFO L226 Difference]: Without dead ends: 2090 [2021-11-25 20:30:30,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:30,305 INFO L933 BasicCegarLoop]: 1729 mSDtfsCounter, 1440 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:30,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1440 Valid, 3095 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:30:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-25 20:30:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2085. [2021-11-25 20:30:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 1228 states have (on average 1.3200325732899023) internal successors, (1621), 1280 states have internal predecessors, (1621), 711 states have call successors, (711), 144 states have call predecessors, (711), 143 states have return successors, (707), 681 states have call predecessors, (707), 707 states have call successors, (707) [2021-11-25 20:30:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 3039 transitions. [2021-11-25 20:30:30,533 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 3039 transitions. Word has length 114 [2021-11-25 20:30:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 3039 transitions. [2021-11-25 20:30:30,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:30:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 3039 transitions. [2021-11-25 20:30:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-25 20:30:30,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:30,539 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:30:30,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 694955965, now seen corresponding path program 1 times [2021-11-25 20:30:30,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904382493] [2021-11-25 20:30:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:30,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-25 20:30:30,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904382493] [2021-11-25 20:30:30,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904382493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:30,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:30,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:30:30,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158560040] [2021-11-25 20:30:30,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:30:30,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:30:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:30,854 INFO L87 Difference]: Start difference. First operand 2085 states and 3039 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:30:34,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:34,291 INFO L93 Difference]: Finished difference Result 5802 states and 8445 transitions. [2021-11-25 20:30:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:30:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-25 20:30:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:34,327 INFO L225 Difference]: With dead ends: 5802 [2021-11-25 20:30:34,327 INFO L226 Difference]: Without dead ends: 3736 [2021-11-25 20:30:34,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:34,339 INFO L933 BasicCegarLoop]: 1743 mSDtfsCounter, 1277 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 3085 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 500 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:30:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-11-25 20:30:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3706. [2021-11-25 20:30:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2177 states have (on average 1.3201653651814425) internal successors, (2874), 2274 states have internal predecessors, (2874), 1252 states have call successors, (1252), 277 states have call predecessors, (1252), 274 states have return successors, (1264), 1189 states have call predecessors, (1264), 1248 states have call successors, (1264) [2021-11-25 20:30:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5390 transitions. [2021-11-25 20:30:34,580 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5390 transitions. Word has length 113 [2021-11-25 20:30:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:34,581 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5390 transitions. [2021-11-25 20:30:34,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:30:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5390 transitions. [2021-11-25 20:30:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 20:30:34,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:34,593 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:34,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:30:34,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1974134420, now seen corresponding path program 1 times [2021-11-25 20:30:34,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:34,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232791876] [2021-11-25 20:30:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:34,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-25 20:30:34,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232791876] [2021-11-25 20:30:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232791876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:34,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:34,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:30:34,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204343141] [2021-11-25 20:30:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:30:34,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:30:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:34,858 INFO L87 Difference]: Start difference. First operand 3706 states and 5390 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:30:37,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:38,462 INFO L93 Difference]: Finished difference Result 8656 states and 12545 transitions. [2021-11-25 20:30:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:30:38,463 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2021-11-25 20:30:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:38,509 INFO L225 Difference]: With dead ends: 8656 [2021-11-25 20:30:38,509 INFO L226 Difference]: Without dead ends: 4969 [2021-11-25 20:30:38,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:38,530 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 1284 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:38,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 3048 Invalid, 533 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:30:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2021-11-25 20:30:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 4942. [2021-11-25 20:30:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4942 states, 2868 states have (on average 1.3057880055788005) internal successors, (3745), 3007 states have internal predecessors, (3745), 1680 states have call successors, (1680), 395 states have call predecessors, (1680), 391 states have return successors, (1703), 1586 states have call predecessors, (1703), 1676 states have call successors, (1703) [2021-11-25 20:30:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4942 states to 4942 states and 7128 transitions. [2021-11-25 20:30:38,843 INFO L78 Accepts]: Start accepts. Automaton has 4942 states and 7128 transitions. Word has length 117 [2021-11-25 20:30:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:38,843 INFO L470 AbstractCegarLoop]: Abstraction has 4942 states and 7128 transitions. [2021-11-25 20:30:38,844 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:30:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4942 states and 7128 transitions. [2021-11-25 20:30:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 20:30:38,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:38,850 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 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] [2021-11-25 20:30:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:30:38,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 837874871, now seen corresponding path program 1 times [2021-11-25 20:30:38,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579341136] [2021-11-25 20:30:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:38,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-25 20:30:39,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579341136] [2021-11-25 20:30:39,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579341136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:39,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:39,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:39,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419828415] [2021-11-25 20:30:39,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:39,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:39,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:39,237 INFO L87 Difference]: Start difference. First operand 4942 states and 7128 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:30:42,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:43,389 INFO L93 Difference]: Finished difference Result 6541 states and 9406 transitions. [2021-11-25 20:30:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:30:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 158 [2021-11-25 20:30:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:43,456 INFO L225 Difference]: With dead ends: 6541 [2021-11-25 20:30:43,456 INFO L226 Difference]: Without dead ends: 6539 [2021-11-25 20:30:43,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:43,463 INFO L933 BasicCegarLoop]: 1691 mSDtfsCounter, 1270 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:43,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 6418 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:30:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-11-25 20:30:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6532. [2021-11-25 20:30:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 3776 states have (on average 1.30323093220339) internal successors, (4921), 3961 states have internal predecessors, (4921), 2226 states have call successors, (2226), 533 states have call predecessors, (2226), 527 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-25 20:30:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 9400 transitions. [2021-11-25 20:30:43,928 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 9400 transitions. Word has length 158 [2021-11-25 20:30:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:43,929 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 9400 transitions. [2021-11-25 20:30:43,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 20:30:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 9400 transitions. [2021-11-25 20:30:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-25 20:30:43,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:43,938 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:43,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:30:43,938 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1042742978, now seen corresponding path program 1 times [2021-11-25 20:30:43,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185495740] [2021-11-25 20:30:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-25 20:30:44,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185495740] [2021-11-25 20:30:44,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185495740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:44,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:44,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:44,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353716411] [2021-11-25 20:30:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:44,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:44,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:44,231 INFO L87 Difference]: Start difference. First operand 6532 states and 9400 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:30:47,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:48,618 INFO L93 Difference]: Finished difference Result 6545 states and 9409 transitions. [2021-11-25 20:30:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:30:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 163 [2021-11-25 20:30:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:48,691 INFO L225 Difference]: With dead ends: 6545 [2021-11-25 20:30:48,692 INFO L226 Difference]: Without dead ends: 6543 [2021-11-25 20:30:48,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:48,698 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:48,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 20:30:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6543 states. [2021-11-25 20:30:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6543 to 6536. [2021-11-25 20:30:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 3779 states have (on average 1.3029902090500132) internal successors, (4924), 3964 states have internal predecessors, (4924), 2226 states have call successors, (2226), 534 states have call predecessors, (2226), 528 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-25 20:30:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 9403 transitions. [2021-11-25 20:30:49,235 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 9403 transitions. Word has length 163 [2021-11-25 20:30:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:49,236 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 9403 transitions. [2021-11-25 20:30:49,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:30:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 9403 transitions. [2021-11-25 20:30:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-25 20:30:49,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:49,247 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:30:49,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:30:49,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -655977125, now seen corresponding path program 1 times [2021-11-25 20:30:49,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:49,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382935933] [2021-11-25 20:30:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:49,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-25 20:30:49,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:49,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382935933] [2021-11-25 20:30:49,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382935933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:49,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:49,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:49,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570887121] [2021-11-25 20:30:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:49,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:49,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:49,519 INFO L87 Difference]: Start difference. First operand 6536 states and 9403 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:30:52,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:53,845 INFO L93 Difference]: Finished difference Result 6549 states and 9412 transitions. [2021-11-25 20:30:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:30:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2021-11-25 20:30:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:53,899 INFO L225 Difference]: With dead ends: 6549 [2021-11-25 20:30:53,899 INFO L226 Difference]: Without dead ends: 6547 [2021-11-25 20:30:53,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:30:53,905 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:53,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1274 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 20:30:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2021-11-25 20:30:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 6540. [2021-11-25 20:30:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 3782 states have (on average 1.3027498677948175) internal successors, (4927), 3967 states have internal predecessors, (4927), 2226 states have call successors, (2226), 535 states have call predecessors, (2226), 529 states have return successors, (2253), 2099 states have call predecessors, (2253), 2218 states have call successors, (2253) [2021-11-25 20:30:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 9406 transitions. [2021-11-25 20:30:54,319 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 9406 transitions. Word has length 169 [2021-11-25 20:30:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 6540 states and 9406 transitions. [2021-11-25 20:30:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:30:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 9406 transitions. [2021-11-25 20:30:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-25 20:30:54,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:54,330 INFO L514 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:30:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:30:54,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1025455084, now seen corresponding path program 1 times [2021-11-25 20:30:54,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513654806] [2021-11-25 20:30:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-11-25 20:30:54,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:54,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513654806] [2021-11-25 20:30:54,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513654806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:54,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:54,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:30:54,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455442687] [2021-11-25 20:30:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:54,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:30:54,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:30:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:54,601 INFO L87 Difference]: Start difference. First operand 6540 states and 9406 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:30:57,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:30:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:30:58,515 INFO L93 Difference]: Finished difference Result 14262 states and 20500 transitions. [2021-11-25 20:30:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:30:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-25 20:30:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:30:58,564 INFO L225 Difference]: With dead ends: 14262 [2021-11-25 20:30:58,564 INFO L226 Difference]: Without dead ends: 7759 [2021-11-25 20:30:58,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:30:58,597 INFO L933 BasicCegarLoop]: 2001 mSDtfsCounter, 971 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:30:58,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 3348 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 669 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:30:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2021-11-25 20:30:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7695. [2021-11-25 20:30:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7695 states, 4591 states have (on average 1.3014593770420388) internal successors, (5975), 4788 states have internal predecessors, (5975), 2481 states have call successors, (2481), 631 states have call predecessors, (2481), 620 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-25 20:30:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7695 states to 7695 states and 10956 transitions. [2021-11-25 20:30:59,028 INFO L78 Accepts]: Start accepts. Automaton has 7695 states and 10956 transitions. Word has length 165 [2021-11-25 20:30:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:30:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 7695 states and 10956 transitions. [2021-11-25 20:30:59,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:30:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7695 states and 10956 transitions. [2021-11-25 20:30:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-25 20:30:59,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:30:59,037 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:30:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:30:59,037 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:30:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:30:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1266439834, now seen corresponding path program 1 times [2021-11-25 20:30:59,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:30:59,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67038514] [2021-11-25 20:30:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:30:59,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:30:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-25 20:30:59,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:30:59,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67038514] [2021-11-25 20:30:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67038514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:30:59,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:30:59,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:30:59,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009033740] [2021-11-25 20:30:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:30:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:30:59,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:30:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:30:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:30:59,313 INFO L87 Difference]: Start difference. First operand 7695 states and 10956 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:31:02,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:03,592 INFO L93 Difference]: Finished difference Result 7708 states and 10965 transitions. [2021-11-25 20:31:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 174 [2021-11-25 20:31:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:03,636 INFO L225 Difference]: With dead ends: 7708 [2021-11-25 20:31:03,636 INFO L226 Difference]: Without dead ends: 7706 [2021-11-25 20:31:03,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:03,642 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:03,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 20:31:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-11-25 20:31:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7699. [2021-11-25 20:31:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 4594 states have (on average 1.3012625163256422) internal successors, (5978), 4791 states have internal predecessors, (5978), 2481 states have call successors, (2481), 632 states have call predecessors, (2481), 621 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-25 20:31:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 10959 transitions. [2021-11-25 20:31:04,057 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 10959 transitions. Word has length 174 [2021-11-25 20:31:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 10959 transitions. [2021-11-25 20:31:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:31:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 10959 transitions. [2021-11-25 20:31:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 20:31:04,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:04,065 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:04,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:31:04,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1439016183, now seen corresponding path program 1 times [2021-11-25 20:31:04,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177054862] [2021-11-25 20:31:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:04,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-25 20:31:04,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177054862] [2021-11-25 20:31:04,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177054862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:04,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:04,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:04,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058868498] [2021-11-25 20:31:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:04,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:04,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:04,403 INFO L87 Difference]: Start difference. First operand 7699 states and 10959 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 20:31:07,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:08,650 INFO L93 Difference]: Finished difference Result 7712 states and 10968 transitions. [2021-11-25 20:31:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:08,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 178 [2021-11-25 20:31:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:08,693 INFO L225 Difference]: With dead ends: 7712 [2021-11-25 20:31:08,693 INFO L226 Difference]: Without dead ends: 7710 [2021-11-25 20:31:08,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:08,700 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:08,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 20:31:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7710 states. [2021-11-25 20:31:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7710 to 7703. [2021-11-25 20:31:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7703 states, 4597 states have (on average 1.3010659125516641) internal successors, (5981), 4794 states have internal predecessors, (5981), 2481 states have call successors, (2481), 633 states have call predecessors, (2481), 622 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-25 20:31:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 10962 transitions. [2021-11-25 20:31:09,112 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 10962 transitions. Word has length 178 [2021-11-25 20:31:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:09,113 INFO L470 AbstractCegarLoop]: Abstraction has 7703 states and 10962 transitions. [2021-11-25 20:31:09,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 20:31:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 10962 transitions. [2021-11-25 20:31:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-25 20:31:09,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:09,120 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:09,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:31:09,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash 227472122, now seen corresponding path program 1 times [2021-11-25 20:31:09,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:09,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322867184] [2021-11-25 20:31:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:09,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-25 20:31:09,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322867184] [2021-11-25 20:31:09,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322867184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:09,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:09,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:09,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153755813] [2021-11-25 20:31:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:09,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:09,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:09,359 INFO L87 Difference]: Start difference. First operand 7703 states and 10962 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:31:12,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:13,299 INFO L93 Difference]: Finished difference Result 7716 states and 10971 transitions. [2021-11-25 20:31:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 184 [2021-11-25 20:31:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:13,339 INFO L225 Difference]: With dead ends: 7716 [2021-11-25 20:31:13,339 INFO L226 Difference]: Without dead ends: 7714 [2021-11-25 20:31:13,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:13,346 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:13,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 20:31:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-11-25 20:31:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7707. [2021-11-25 20:31:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 4600 states have (on average 1.3008695652173914) internal successors, (5984), 4797 states have internal predecessors, (5984), 2481 states have call successors, (2481), 634 states have call predecessors, (2481), 623 states have return successors, (2500), 2336 states have call predecessors, (2500), 2473 states have call successors, (2500) [2021-11-25 20:31:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10965 transitions. [2021-11-25 20:31:13,768 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10965 transitions. Word has length 184 [2021-11-25 20:31:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:13,771 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 10965 transitions. [2021-11-25 20:31:13,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:31:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10965 transitions. [2021-11-25 20:31:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-25 20:31:13,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:13,778 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 7, 6, 6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:13,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:31:13,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2110788709, now seen corresponding path program 1 times [2021-11-25 20:31:13,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:13,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573215506] [2021-11-25 20:31:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:13,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-25 20:31:14,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:14,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573215506] [2021-11-25 20:31:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573215506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:14,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:14,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:14,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123838890] [2021-11-25 20:31:14,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:14,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:14,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:14,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:14,055 INFO L87 Difference]: Start difference. First operand 7707 states and 10965 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 20:31:17,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:18,201 INFO L93 Difference]: Finished difference Result 12264 states and 17449 transitions. [2021-11-25 20:31:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 189 [2021-11-25 20:31:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:18,267 INFO L225 Difference]: With dead ends: 12264 [2021-11-25 20:31:18,267 INFO L226 Difference]: Without dead ends: 12262 [2021-11-25 20:31:18,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:18,276 INFO L933 BasicCegarLoop]: 1816 mSDtfsCounter, 1251 mSDsluCounter, 5795 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 6783 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1256 Valid, 6783 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1144 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 20:31:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12262 states. [2021-11-25 20:31:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12262 to 12251. [2021-11-25 20:31:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12251 states, 7289 states have (on average 1.3042941418575937) internal successors, (9507), 7617 states have internal predecessors, (9507), 3948 states have call successors, (3948), 1039 states have call predecessors, (3948), 1011 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2021-11-25 20:31:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12251 states to 12251 states and 17437 transitions. [2021-11-25 20:31:19,024 INFO L78 Accepts]: Start accepts. Automaton has 12251 states and 17437 transitions. Word has length 189 [2021-11-25 20:31:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 12251 states and 17437 transitions. [2021-11-25 20:31:19,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 20:31:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12251 states and 17437 transitions. [2021-11-25 20:31:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 20:31:19,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:19,034 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:31:19,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:31:19,034 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 910378842, now seen corresponding path program 1 times [2021-11-25 20:31:19,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:19,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600330466] [2021-11-25 20:31:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:19,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-25 20:31:19,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600330466] [2021-11-25 20:31:19,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600330466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:19,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:19,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:19,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666261937] [2021-11-25 20:31:19,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:19,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:19,251 INFO L87 Difference]: Start difference. First operand 12251 states and 17437 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:31:22,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:23,536 INFO L93 Difference]: Finished difference Result 12264 states and 17446 transitions. [2021-11-25 20:31:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 194 [2021-11-25 20:31:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:23,604 INFO L225 Difference]: With dead ends: 12264 [2021-11-25 20:31:23,605 INFO L226 Difference]: Without dead ends: 12262 [2021-11-25 20:31:23,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:23,615 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:31:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12262 states. [2021-11-25 20:31:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12262 to 12255. [2021-11-25 20:31:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12255 states, 7292 states have (on average 1.3041689522764675) internal successors, (9510), 7620 states have internal predecessors, (9510), 3948 states have call successors, (3948), 1040 states have call predecessors, (3948), 1012 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2021-11-25 20:31:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12255 states to 12255 states and 17440 transitions. [2021-11-25 20:31:24,381 INFO L78 Accepts]: Start accepts. Automaton has 12255 states and 17440 transitions. Word has length 194 [2021-11-25 20:31:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:24,382 INFO L470 AbstractCegarLoop]: Abstraction has 12255 states and 17440 transitions. [2021-11-25 20:31:24,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:31:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12255 states and 17440 transitions. [2021-11-25 20:31:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-25 20:31:24,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:24,391 INFO L514 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:31:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:31:24,392 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1524923717, now seen corresponding path program 1 times [2021-11-25 20:31:24,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:24,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265544851] [2021-11-25 20:31:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:24,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-11-25 20:31:24,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265544851] [2021-11-25 20:31:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265544851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:24,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:24,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:24,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077535338] [2021-11-25 20:31:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:24,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:24,617 INFO L87 Difference]: Start difference. First operand 12255 states and 17440 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:31:27,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:28,837 INFO L93 Difference]: Finished difference Result 12268 states and 17449 transitions. [2021-11-25 20:31:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 199 [2021-11-25 20:31:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:28,900 INFO L225 Difference]: With dead ends: 12268 [2021-11-25 20:31:28,901 INFO L226 Difference]: Without dead ends: 12266 [2021-11-25 20:31:28,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:28,908 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:28,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 20:31:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12266 states. [2021-11-25 20:31:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12266 to 12259. [2021-11-25 20:31:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12259 states, 7295 states have (on average 1.304043865661412) internal successors, (9513), 7623 states have internal predecessors, (9513), 3948 states have call successors, (3948), 1041 states have call predecessors, (3948), 1013 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2021-11-25 20:31:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12259 states to 12259 states and 17443 transitions. [2021-11-25 20:31:29,428 INFO L78 Accepts]: Start accepts. Automaton has 12259 states and 17443 transitions. Word has length 199 [2021-11-25 20:31:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:29,429 INFO L470 AbstractCegarLoop]: Abstraction has 12259 states and 17443 transitions. [2021-11-25 20:31:29,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:31:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 12259 states and 17443 transitions. [2021-11-25 20:31:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-25 20:31:29,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,437 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2021-11-25 20:31:29,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:31:29,437 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1071085608, now seen corresponding path program 1 times [2021-11-25 20:31:29,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507153812] [2021-11-25 20:31:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-25 20:31:29,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:29,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507153812] [2021-11-25 20:31:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507153812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:29,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:29,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203667807] [2021-11-25 20:31:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:29,755 INFO L87 Difference]: Start difference. First operand 12259 states and 17443 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:31:32,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:33,894 INFO L93 Difference]: Finished difference Result 12272 states and 17452 transitions. [2021-11-25 20:31:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:33,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 202 [2021-11-25 20:31:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:33,943 INFO L225 Difference]: With dead ends: 12272 [2021-11-25 20:31:33,943 INFO L226 Difference]: Without dead ends: 12270 [2021-11-25 20:31:33,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:33,951 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1266 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:33,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 20:31:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2021-11-25 20:31:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 12263. [2021-11-25 20:31:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12263 states, 7298 states have (on average 1.3039188818854481) internal successors, (9516), 7626 states have internal predecessors, (9516), 3948 states have call successors, (3948), 1042 states have call predecessors, (3948), 1014 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2021-11-25 20:31:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12263 states to 12263 states and 17446 transitions. [2021-11-25 20:31:34,596 INFO L78 Accepts]: Start accepts. Automaton has 12263 states and 17446 transitions. Word has length 202 [2021-11-25 20:31:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:34,596 INFO L470 AbstractCegarLoop]: Abstraction has 12263 states and 17446 transitions. [2021-11-25 20:31:34,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:31:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12263 states and 17446 transitions. [2021-11-25 20:31:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-25 20:31:34,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:34,606 INFO L514 BasicCegarLoop]: trace histogram [13, 11, 10, 10, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:34,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:31:34,606 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash 46031323, now seen corresponding path program 1 times [2021-11-25 20:31:34,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437210865] [2021-11-25 20:31:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:34,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-25 20:31:34,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:34,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437210865] [2021-11-25 20:31:34,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437210865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:34,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:34,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:34,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475323788] [2021-11-25 20:31:34,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:34,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:34,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:34,823 INFO L87 Difference]: Start difference. First operand 12263 states and 17446 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:31:38,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:38,966 INFO L93 Difference]: Finished difference Result 12276 states and 17455 transitions. [2021-11-25 20:31:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 209 [2021-11-25 20:31:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:39,022 INFO L225 Difference]: With dead ends: 12276 [2021-11-25 20:31:39,022 INFO L226 Difference]: Without dead ends: 12272 [2021-11-25 20:31:39,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:39,032 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1265 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:39,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 6421 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1006 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 20:31:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12272 states. [2021-11-25 20:31:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12272 to 12265. [2021-11-25 20:31:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12265 states, 7300 states have (on average 1.3036986301369864) internal successors, (9517), 7627 states have internal predecessors, (9517), 3948 states have call successors, (3948), 1043 states have call predecessors, (3948), 1014 states have return successors, (3982), 3685 states have call predecessors, (3982), 3936 states have call successors, (3982) [2021-11-25 20:31:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12265 states to 12265 states and 17447 transitions. [2021-11-25 20:31:39,724 INFO L78 Accepts]: Start accepts. Automaton has 12265 states and 17447 transitions. Word has length 209 [2021-11-25 20:31:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:39,724 INFO L470 AbstractCegarLoop]: Abstraction has 12265 states and 17447 transitions. [2021-11-25 20:31:39,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:31:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 12265 states and 17447 transitions. [2021-11-25 20:31:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-25 20:31:39,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:39,731 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 9, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:39,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:31:39,732 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1476847590, now seen corresponding path program 1 times [2021-11-25 20:31:39,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:39,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629809122] [2021-11-25 20:31:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:39,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2021-11-25 20:31:39,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629809122] [2021-11-25 20:31:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629809122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:39,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:39,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:39,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741560819] [2021-11-25 20:31:39,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:39,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:39,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:39,958 INFO L87 Difference]: Start difference. First operand 12265 states and 17447 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:31:43,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:44,011 INFO L93 Difference]: Finished difference Result 12272 states and 17451 transitions. [2021-11-25 20:31:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:31:44,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 214 [2021-11-25 20:31:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:44,170 INFO L225 Difference]: With dead ends: 12272 [2021-11-25 20:31:44,171 INFO L226 Difference]: Without dead ends: 12177 [2021-11-25 20:31:44,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:44,177 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1261 mSDsluCounter, 5468 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:44,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 6423 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1002 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 20:31:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-11-25 20:31:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12172. [2021-11-25 20:31:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12172 states, 7259 states have (on average 1.3037608486017358) internal successors, (9464), 7575 states have internal predecessors, (9464), 3909 states have call successors, (3909), 1026 states have call predecessors, (3909), 1001 states have return successors, (3947), 3661 states have call predecessors, (3947), 3901 states have call successors, (3947) [2021-11-25 20:31:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12172 states to 12172 states and 17320 transitions. [2021-11-25 20:31:44,750 INFO L78 Accepts]: Start accepts. Automaton has 12172 states and 17320 transitions. Word has length 214 [2021-11-25 20:31:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:44,751 INFO L470 AbstractCegarLoop]: Abstraction has 12172 states and 17320 transitions. [2021-11-25 20:31:44,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:31:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 12172 states and 17320 transitions. [2021-11-25 20:31:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-25 20:31:44,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:44,759 INFO L514 BasicCegarLoop]: trace histogram [15, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:44,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:31:44,759 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1819122588, now seen corresponding path program 1 times [2021-11-25 20:31:44,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834527648] [2021-11-25 20:31:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:44,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-25 20:31:44,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834527648] [2021-11-25 20:31:44,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834527648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:44,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:44,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:44,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680532007] [2021-11-25 20:31:44,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:44,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:44,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:44,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:44,959 INFO L87 Difference]: Start difference. First operand 12172 states and 17320 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:31:48,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:49,484 INFO L93 Difference]: Finished difference Result 28132 states and 40065 transitions. [2021-11-25 20:31:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 213 [2021-11-25 20:31:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:49,560 INFO L225 Difference]: With dead ends: 28132 [2021-11-25 20:31:49,560 INFO L226 Difference]: Without dead ends: 16137 [2021-11-25 20:31:49,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:49,623 INFO L933 BasicCegarLoop]: 2167 mSDtfsCounter, 976 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [976 Valid, 3512 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 706 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:31:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16137 states. [2021-11-25 20:31:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16137 to 16075. [2021-11-25 20:31:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16075 states, 9706 states have (on average 1.302287245003091) internal successors, (12640), 10104 states have internal predecessors, (12640), 5037 states have call successors, (5037), 1367 states have call predecessors, (5037), 1329 states have return successors, (5075), 4712 states have call predecessors, (5075), 5029 states have call successors, (5075) [2021-11-25 20:31:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16075 states to 16075 states and 22752 transitions. [2021-11-25 20:31:50,559 INFO L78 Accepts]: Start accepts. Automaton has 16075 states and 22752 transitions. Word has length 213 [2021-11-25 20:31:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:50,560 INFO L470 AbstractCegarLoop]: Abstraction has 16075 states and 22752 transitions. [2021-11-25 20:31:50,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:31:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16075 states and 22752 transitions. [2021-11-25 20:31:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-25 20:31:50,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:50,574 INFO L514 BasicCegarLoop]: trace histogram [17, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:50,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:31:50,574 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:50,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2021355704, now seen corresponding path program 1 times [2021-11-25 20:31:50,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:50,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109198918] [2021-11-25 20:31:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:50,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-25 20:31:51,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:51,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109198918] [2021-11-25 20:31:51,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109198918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:51,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:51,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:51,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275657627] [2021-11-25 20:31:51,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:51,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:51,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:51,053 INFO L87 Difference]: Start difference. First operand 16075 states and 22752 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:31:54,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:31:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:55,290 INFO L93 Difference]: Finished difference Result 16089 states and 22764 transitions. [2021-11-25 20:31:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 276 [2021-11-25 20:31:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:55,333 INFO L225 Difference]: With dead ends: 16089 [2021-11-25 20:31:55,333 INFO L226 Difference]: Without dead ends: 16087 [2021-11-25 20:31:55,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:55,340 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 1222 mSDsluCounter, 5868 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 6878 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:55,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 6878 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1139 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 20:31:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16087 states. [2021-11-25 20:31:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16087 to 16075. [2021-11-25 20:31:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16075 states, 9706 states have (on average 1.3010508963527714) internal successors, (12628), 10104 states have internal predecessors, (12628), 5037 states have call successors, (5037), 1367 states have call predecessors, (5037), 1329 states have return successors, (5075), 4712 states have call predecessors, (5075), 5029 states have call successors, (5075) [2021-11-25 20:31:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16075 states to 16075 states and 22740 transitions. [2021-11-25 20:31:56,135 INFO L78 Accepts]: Start accepts. Automaton has 16075 states and 22740 transitions. Word has length 276 [2021-11-25 20:31:56,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:56,136 INFO L470 AbstractCegarLoop]: Abstraction has 16075 states and 22740 transitions. [2021-11-25 20:31:56,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:31:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 16075 states and 22740 transitions. [2021-11-25 20:31:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-25 20:31:56,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:56,151 INFO L514 BasicCegarLoop]: trace histogram [17, 11, 11, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:56,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:31:56,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:31:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1245235507, now seen corresponding path program 1 times [2021-11-25 20:31:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838656666] [2021-11-25 20:31:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:56,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2021-11-25 20:31:56,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:56,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838656666] [2021-11-25 20:31:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838656666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:56,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:56,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482545098] [2021-11-25 20:31:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:56,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:56,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:56,390 INFO L87 Difference]: Start difference. First operand 16075 states and 22740 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:31:59,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:00,243 INFO L93 Difference]: Finished difference Result 16484 states and 23163 transitions. [2021-11-25 20:32:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 295 [2021-11-25 20:32:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:00,292 INFO L225 Difference]: With dead ends: 16484 [2021-11-25 20:32:00,292 INFO L226 Difference]: Without dead ends: 16482 [2021-11-25 20:32:00,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:32:00,300 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 331 mSDsluCounter, 4835 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:00,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 5518 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1042 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:32:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-11-25 20:32:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 16482. [2021-11-25 20:32:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16482 states, 9922 states have (on average 1.2944970772021769) internal successors, (12844), 10323 states have internal predecessors, (12844), 5134 states have call successors, (5134), 1462 states have call predecessors, (5134), 1424 states have return successors, (5172), 4809 states have call predecessors, (5172), 5126 states have call successors, (5172) [2021-11-25 20:32:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16482 states to 16482 states and 23150 transitions. [2021-11-25 20:32:00,891 INFO L78 Accepts]: Start accepts. Automaton has 16482 states and 23150 transitions. Word has length 295 [2021-11-25 20:32:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:00,892 INFO L470 AbstractCegarLoop]: Abstraction has 16482 states and 23150 transitions. [2021-11-25 20:32:00,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:32:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16482 states and 23150 transitions. [2021-11-25 20:32:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-25 20:32:00,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:00,910 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:00,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:32:00,910 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:32:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:00,911 INFO L85 PathProgramCache]: Analyzing trace with hash 896564391, now seen corresponding path program 1 times [2021-11-25 20:32:00,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:00,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722513728] [2021-11-25 20:32:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:00,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:01,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:32:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686073467] [2021-11-25 20:32:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:01,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:01,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:01,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:01,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:32:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 4267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:32:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2021-11-25 20:32:03,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:03,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:03,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722513728] [2021-11-25 20:32:03,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:32:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686073467] [2021-11-25 20:32:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686073467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:03,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:03,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:32:03,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770665631] [2021-11-25 20:32:03,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:03,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:03,383 INFO L87 Difference]: Start difference. First operand 16482 states and 23150 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-25 20:32:06,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:32:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:07,421 INFO L93 Difference]: Finished difference Result 39839 states and 57335 transitions. [2021-11-25 20:32:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 404 [2021-11-25 20:32:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:07,581 INFO L225 Difference]: With dead ends: 39839 [2021-11-25 20:32:07,581 INFO L226 Difference]: Without dead ends: 23534 [2021-11-25 20:32:07,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:07,612 INFO L933 BasicCegarLoop]: 1964 mSDtfsCounter, 417 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:07,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 3471 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 606 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:32:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23534 states. [2021-11-25 20:32:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23534 to 16492. [2021-11-25 20:32:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16492 states, 9932 states have (on average 1.2942005638340717) internal successors, (12854), 10333 states have internal predecessors, (12854), 5134 states have call successors, (5134), 1462 states have call predecessors, (5134), 1424 states have return successors, (5172), 4809 states have call predecessors, (5172), 5126 states have call successors, (5172) [2021-11-25 20:32:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16492 states to 16492 states and 23160 transitions. [2021-11-25 20:32:08,351 INFO L78 Accepts]: Start accepts. Automaton has 16492 states and 23160 transitions. Word has length 404 [2021-11-25 20:32:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 16492 states and 23160 transitions. [2021-11-25 20:32:08,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-11-25 20:32:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 16492 states and 23160 transitions. [2021-11-25 20:32:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-25 20:32:08,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:08,375 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 15, 11, 11, 11, 11, 11, 11, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:08,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:08,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:08,592 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:32:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 452032813, now seen corresponding path program 1 times [2021-11-25 20:32:08,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:08,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251908396] [2021-11-25 20:32:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:08,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2021-11-25 20:32:09,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251908396] [2021-11-25 20:32:09,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251908396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123051309] [2021-11-25 20:32:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:09,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:09,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:09,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee8abf0b-b500-4964-956b-76dd7010c92a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:32:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 4384 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:32:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-11-25 20:32:11,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2021-11-25 20:32:12,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123051309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790751824] [2021-11-25 20:32:12,419 INFO L159 IcfgInterpreter]: Started Sifa with 211 locations of interest [2021-11-25 20:32:12,420 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:12,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:12,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:12,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs