./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-dlink-sundance.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_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/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_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/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-dlink-sundance.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/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_6833df60-6b88-477b-acb2-ac138bad1b2f/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 d4784d7b609e947942ffa9f8266acf243583adf996e2bcae78fb9e8c8fa71002 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:59:45,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:59:45,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:59:45,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:59:45,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:59:45,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:59:45,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:59:45,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:59:45,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:59:45,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:59:45,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:59:45,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:59:45,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:59:45,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:59:45,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:59:45,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:59:45,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:59:45,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:59:45,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:59:45,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:59:45,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:59:45,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:59:45,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:59:45,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:59:45,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:59:45,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:59:45,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:59:45,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:59:45,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:59:45,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:59:45,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:59:45,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:59:45,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:59:45,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:59:45,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:59:45,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:59:45,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:59:45,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:59:45,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:59:45,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:59:45,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:59:45,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 17:59:45,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:59:45,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:59:45,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:59:45,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:59:45,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:59:45,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:59:45,756 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:59:45,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:59:45,757 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:59:45,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:59:45,758 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:59:45,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:59:45,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:59:45,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:59:45,759 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:59:45,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:59:45,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:59:45,760 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:59:45,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:59:45,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:59:45,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:59:45,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:59:45,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:59:45,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:59:45,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:59:45,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:59:45,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:59:45,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:59:45,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:59:45,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:45,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:59:45,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:59:45,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:59:45,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:59:45,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:59:45,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:59:45,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:59:45,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:59:45,766 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_6833df60-6b88-477b-acb2-ac138bad1b2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4784d7b609e947942ffa9f8266acf243583adf996e2bcae78fb9e8c8fa71002 [2021-11-25 17:59:45,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:59:46,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:59:46,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:59:46,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:59:46,019 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:59:46,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-25 17:59:46,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/data/bca4a5cd2/eb06dd13a0c94851becda77c3212f91f/FLAGcb8953962 [2021-11-25 17:59:47,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:59:47,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-25 17:59:47,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/data/bca4a5cd2/eb06dd13a0c94851becda77c3212f91f/FLAGcb8953962 [2021-11-25 17:59:47,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/data/bca4a5cd2/eb06dd13a0c94851becda77c3212f91f [2021-11-25 17:59:47,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:59:47,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:59:47,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:47,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:59:47,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:59:47,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:47" (1/1) ... [2021-11-25 17:59:47,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263d4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:47, skipping insertion in model container [2021-11-25 17:59:47,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:47" (1/1) ... [2021-11-25 17:59:47,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:59:47,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:59:50,413 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349228,349241] [2021-11-25 17:59:50,415 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349397,349410] [2021-11-25 17:59:50,416 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349564,349577] [2021-11-25 17:59:50,416 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349732,349745] [2021-11-25 17:59:50,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:50,524 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:59:50,983 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349228,349241] [2021-11-25 17:59:50,984 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349397,349410] [2021-11-25 17:59:50,984 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349564,349577] [2021-11-25 17:59:50,984 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_6833df60-6b88-477b-acb2-ac138bad1b2f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i[349732,349745] [2021-11-25 17:59:50,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:51,236 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:59:51,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51 WrapperNode [2021-11-25 17:59:51,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:51,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:51,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:59:51,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:59:51,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,585 INFO L137 Inliner]: procedures = 470, calls = 2162, calls flagged for inlining = 234, calls inlined = 217, statements flattened = 5446 [2021-11-25 17:59:51,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:51,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:59:51,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:59:51,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:59:51,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:59:51,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:59:51,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:59:51,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:59:51,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (1/1) ... [2021-11-25 17:59:51,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:51,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:59:51,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6833df60-6b88-477b-acb2-ac138bad1b2f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:59:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-25 17:59:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-25 17:59:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-25 17:59:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-25 17:59:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 17:59:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 17:59:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 17:59:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 17:59:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-25 17:59:52,015 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-25 17:59:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 17:59:52,015 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 17:59:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 17:59:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 17:59:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 17:59:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 17:59:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 17:59:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 17:59:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-25 17:59:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-25 17:59:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2021-11-25 17:59:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2021-11-25 17:59:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure reset_tx [2021-11-25 17:59:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_tx [2021-11-25 17:59:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_66 [2021-11-25 17:59:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_66 [2021-11-25 17:59:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irq_76 [2021-11-25 17:59:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irq_76 [2021-11-25 17:59:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-25 17:59:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-25 17:59:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 17:59:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 17:59:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 17:59:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 17:59:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 17:59:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 17:59:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 17:59:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 17:59:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-25 17:59:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-25 17:59:52,020 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 17:59:52,020 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 17:59:52,021 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 17:59:52,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 17:59:52,021 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 17:59:52,021 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 17:59:52,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:59:52,021 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_69 [2021-11-25 17:59:52,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_69 [2021-11-25 17:59:52,022 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-25 17:59:52,022 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-25 17:59:52,022 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_init [2021-11-25 17:59:52,022 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_init [2021-11-25 17:59:52,023 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 17:59:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 17:59:52,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 17:59:52,023 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 17:59:52,023 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 17:59:52,023 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-25 17:59:52,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-25 17:59:52,024 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 17:59:52,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 17:59:52,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 17:59:52,024 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 17:59:52,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 17:59:52,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:59:52,025 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-25 17:59:52,025 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-25 17:59:52,025 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 17:59:52,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 17:59:52,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 17:59:52,026 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 17:59:52,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 17:59:52,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 17:59:52,026 INFO L130 BoogieDeclarations]: Found specification of procedure check_duplex [2021-11-25 17:59:52,026 INFO L138 BoogieDeclarations]: Found implementation of procedure check_duplex [2021-11-25 17:59:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 17:59:52,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 17:59:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure pci_choose_state [2021-11-25 17:59:52,027 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_choose_state [2021-11-25 17:59:52,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 17:59:52,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 17:59:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure tx_timeout [2021-11-25 17:59:52,028 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_timeout [2021-11-25 17:59:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_resume [2021-11-25 17:59:52,028 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_resume [2021-11-25 17:59:52,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 17:59:52,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 17:59:52,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:59:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 17:59:52,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 17:59:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 17:59:52,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 17:59:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-25 17:59:52,031 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-25 17:59:52,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:59:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 17:59:52,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 17:59:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 17:59:52,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 17:59:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:59:52,032 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2021-11-25 17:59:52,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2021-11-25 17:59:52,033 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:59:52,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:59:52,034 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-25 17:59:52,037 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-25 17:59:52,038 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-25 17:59:52,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-25 17:59:52,038 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 17:59:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 17:59:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 17:59:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 17:59:52,039 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 17:59:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 17:59:52,045 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-25 17:59:52,045 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-25 17:59:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 17:59:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 17:59:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure __set_mac_addr [2021-11-25 17:59:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_mac_addr [2021-11-25 17:59:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-25 17:59:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-25 17:59:52,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:59:52,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_sundance_exit_14_2 [2021-11-25 17:59:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_sundance_exit_14_2 [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 17:59:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_close [2021-11-25 17:59:52,047 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_close [2021-11-25 17:59:52,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 17:59:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 17:59:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure get_stats [2021-11-25 17:59:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure get_stats [2021-11-25 17:59:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_poll_controller [2021-11-25 17:59:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_poll_controller [2021-11-25 17:59:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 17:59:52,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 17:59:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure nway_reset [2021-11-25 17:59:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure nway_reset [2021-11-25 17:59:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-25 17:59:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_netdev_private [2021-11-25 17:59:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 17:59:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 17:59:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 17:59:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 17:59:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2021-11-25 17:59:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2021-11-25 17:59:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-25 17:59:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-25 17:59:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 17:59:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 17:59:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:59:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 17:59:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 17:59:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_irq_75 [2021-11-25 17:59:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_irq_75 [2021-11-25 17:59:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:59:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-25 17:59:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-25 17:59:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-25 17:59:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-25 17:59:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 17:59:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure intr_handler [2021-11-25 17:59:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_handler [2021-11-25 17:59:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-25 17:59:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-25 17:59:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 17:59:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 17:59:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-25 17:59:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_netdev_private [2021-11-25 17:59:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 17:59:52,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 17:59:52,052 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-25 17:59:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-25 17:59:52,053 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-25 17:59:52,053 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-25 17:59:52,054 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_open [2021-11-25 17:59:52,054 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_open [2021-11-25 17:59:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_reset [2021-11-25 17:59:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_reset [2021-11-25 17:59:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-25 17:59:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-25 17:59:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-25 17:59:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-25 17:59:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 17:59:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 17:59:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 17:59:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 17:59:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 17:59:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 17:59:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure sundance_remove1 [2021-11-25 17:59:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure sundance_remove1 [2021-11-25 17:59:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_70 [2021-11-25 17:59:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_70 [2021-11-25 17:59:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:59:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 17:59:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 17:59:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 17:59:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 17:59:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure refill_rx [2021-11-25 17:59:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure refill_rx [2021-11-25 17:59:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 17:59:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 17:59:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-25 17:59:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-25 17:59:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 17:59:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 17:59:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-25 17:59:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-25 17:59:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:59:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 17:59:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 17:59:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-25 17:59:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-25 17:59:53,015 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:59:53,020 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:59:53,642 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:01:01,828 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 18:01:01,910 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:01:03,531 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:01:03,531 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:01:03,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:01:03 BoogieIcfgContainer [2021-11-25 18:01:03,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:01:03,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:01:03,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:01:03,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:01:03,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:59:47" (1/3) ... [2021-11-25 18:01:03,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3828a689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:01:03, skipping insertion in model container [2021-11-25 18:01:03,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:51" (2/3) ... [2021-11-25 18:01:03,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3828a689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:01:03, skipping insertion in model container [2021-11-25 18:01:03,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:01:03" (3/3) ... [2021-11-25 18:01:03,549 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dlink-sundance.cil.i [2021-11-25 18:01:03,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:01:03,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 18:01:03,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:01:03,647 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 18:01:03,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 18:01:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 1433 states, 823 states have (on average 1.2843256379100851) internal successors, (1057), 861 states have internal predecessors, (1057), 511 states have call successors, (511), 101 states have call predecessors, (511), 100 states have return successors, (505), 498 states have call predecessors, (505), 505 states have call successors, (505) [2021-11-25 18:01:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 18:01:03,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:03,736 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:03,737 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 18:01:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -147284711, now seen corresponding path program 1 times [2021-11-25 18:01:03,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:03,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577725876] [2021-11-25 18:01:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:03,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 18:01:04,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577725876] [2021-11-25 18:01:04,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577725876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:04,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:04,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:04,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328775631] [2021-11-25 18:01:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:04,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:04,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:04,862 INFO L87 Difference]: Start difference. First operand has 1433 states, 823 states have (on average 1.2843256379100851) internal successors, (1057), 861 states have internal predecessors, (1057), 511 states have call successors, (511), 101 states have call predecessors, (511), 100 states have return successors, (505), 498 states have call predecessors, (505), 505 states have call successors, (505) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:01:06,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:12,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:14,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:14,692 INFO L93 Difference]: Finished difference Result 4144 states and 6095 transitions. [2021-11-25 18:01:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2021-11-25 18:01:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:14,738 INFO L225 Difference]: With dead ends: 4144 [2021-11-25 18:01:14,738 INFO L226 Difference]: Without dead ends: 2728 [2021-11-25 18:01:14,753 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 18:01:14,756 INFO L933 BasicCegarLoop]: 2213 mSDtfsCounter, 1914 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 3932 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:14,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 3932 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 592 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2021-11-25 18:01:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-11-25 18:01:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2723. [2021-11-25 18:01:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 1569 states have (on average 1.278521351179095) internal successors, (2006), 1637 states have internal predecessors, (2006), 955 states have call successors, (955), 197 states have call predecessors, (955), 196 states have return successors, (951), 936 states have call predecessors, (951), 951 states have call successors, (951) [2021-11-25 18:01:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 3912 transitions. [2021-11-25 18:01:15,037 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 3912 transitions. Word has length 151 [2021-11-25 18:01:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:15,041 INFO L470 AbstractCegarLoop]: Abstraction has 2723 states and 3912 transitions. [2021-11-25 18:01:15,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:01:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 3912 transitions. [2021-11-25 18:01:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-25 18:01:15,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:15,056 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:15,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:01:15,057 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 18:01:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1126243917, now seen corresponding path program 1 times [2021-11-25 18:01:15,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:15,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019948643] [2021-11-25 18:01:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:15,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 18:01:15,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019948643] [2021-11-25 18:01:15,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019948643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:15,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:15,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:15,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713902522] [2021-11-25 18:01:15,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:15,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:15,672 INFO L87 Difference]: Start difference. First operand 2723 states and 3912 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:01:17,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:21,392 WARN L534 Checker$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 18:01:25,350 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 18:01:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:25,393 INFO L93 Difference]: Finished difference Result 7652 states and 10938 transitions. [2021-11-25 18:01:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 159 [2021-11-25 18:01:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:25,436 INFO L225 Difference]: With dead ends: 7652 [2021-11-25 18:01:25,437 INFO L226 Difference]: Without dead ends: 4956 [2021-11-25 18:01:25,450 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 18:01:25,452 INFO L933 BasicCegarLoop]: 2152 mSDtfsCounter, 1627 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 3827 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:25,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 3827 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 616 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2021-11-25 18:01:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-11-25 18:01:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4926. [2021-11-25 18:01:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 2816 states have (on average 1.2638494318181819) internal successors, (3559), 2945 states have internal predecessors, (3559), 1728 states have call successors, (1728), 382 states have call predecessors, (1728), 379 states have return successors, (1730), 1686 states have call predecessors, (1730), 1724 states have call successors, (1730) [2021-11-25 18:01:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 7017 transitions. [2021-11-25 18:01:25,733 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 7017 transitions. Word has length 159 [2021-11-25 18:01:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 4926 states and 7017 transitions. [2021-11-25 18:01:25,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:01:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 7017 transitions. [2021-11-25 18:01:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-25 18:01:25,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:25,740 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:25,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:01:25,740 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 18:01:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1707911413, now seen corresponding path program 1 times [2021-11-25 18:01:25,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:25,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181666688] [2021-11-25 18:01:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:25,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 18:01:26,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181666688] [2021-11-25 18:01:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181666688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:26,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:26,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672714593] [2021-11-25 18:01:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:26,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:26,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:26,209 INFO L87 Difference]: Start difference. First operand 4926 states and 7017 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 18:01:28,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:32,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:34,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:37,344 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 18:01:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:37,386 INFO L93 Difference]: Finished difference Result 14508 states and 20686 transitions. [2021-11-25 18:01:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 174 [2021-11-25 18:01:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:37,470 INFO L225 Difference]: With dead ends: 14508 [2021-11-25 18:01:37,471 INFO L226 Difference]: Without dead ends: 9609 [2021-11-25 18:01:37,500 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 18:01:37,501 INFO L933 BasicCegarLoop]: 2281 mSDtfsCounter, 1960 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 3948 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:37,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1960 Valid, 3948 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 577 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-25 18:01:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-11-25 18:01:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 9574. [2021-11-25 18:01:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9574 states, 5482 states have (on average 1.2650492520977745) internal successors, (6935), 5751 states have internal predecessors, (6935), 3342 states have call successors, (3342), 758 states have call predecessors, (3342), 747 states have return successors, (3376), 3236 states have call predecessors, (3376), 3338 states have call successors, (3376) [2021-11-25 18:01:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 13653 transitions. [2021-11-25 18:01:38,260 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 13653 transitions. Word has length 174 [2021-11-25 18:01:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:38,261 INFO L470 AbstractCegarLoop]: Abstraction has 9574 states and 13653 transitions. [2021-11-25 18:01:38,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 18:01:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 13653 transitions. [2021-11-25 18:01:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 18:01:38,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:38,266 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 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] [2021-11-25 18:01:38,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:01:38,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:01:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1529660918, now seen corresponding path program 1 times [2021-11-25 18:01:38,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210174539] [2021-11-25 18:01:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:38,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-11-25 18:01:38,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210174539] [2021-11-25 18:01:38,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210174539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:38,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:38,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:01:38,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589221145] [2021-11-25 18:01:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:38,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:01:38,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:01:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:01:38,956 INFO L87 Difference]: Start difference. First operand 9574 states and 13653 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 18:01:41,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:50,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:01:52,431 WARN L534 Checker$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 18:01:58,775 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 18:01:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:58,815 INFO L93 Difference]: Finished difference Result 20515 states and 29041 transitions. [2021-11-25 18:01:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:01:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 183 [2021-11-25 18:01:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:58,900 INFO L225 Difference]: With dead ends: 20515 [2021-11-25 18:01:58,900 INFO L226 Difference]: Without dead ends: 10968 [2021-11-25 18:01:58,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:01:58,953 INFO L933 BasicCegarLoop]: 2926 mSDtfsCounter, 5366 mSDsluCounter, 3858 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 1984 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5468 SdHoareTripleChecker+Valid, 6090 SdHoareTripleChecker+Invalid, 4610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1984 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:58,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5468 Valid, 6090 Invalid, 4610 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1984 Valid, 2623 Invalid, 3 Unknown, 0 Unchecked, 19.3s Time] [2021-11-25 18:01:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2021-11-25 18:01:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 10893. [2021-11-25 18:01:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10893 states, 6335 states have (on average 1.2632991318074192) internal successors, (8003), 6622 states have internal predecessors, (8003), 3617 states have call successors, (3617), 957 states have call predecessors, (3617), 938 states have return successors, (3632), 3487 states have call predecessors, (3632), 3613 states have call successors, (3632) [2021-11-25 18:01:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 15252 transitions. [2021-11-25 18:01:59,707 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 15252 transitions. Word has length 183 [2021-11-25 18:01:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:59,708 INFO L470 AbstractCegarLoop]: Abstraction has 10893 states and 15252 transitions. [2021-11-25 18:01:59,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 18:01:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 15252 transitions. [2021-11-25 18:01:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-25 18:01:59,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:59,714 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:01:59,715 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 18:01:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 25734765, now seen corresponding path program 1 times [2021-11-25 18:01:59,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990506737] [2021-11-25 18:01:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:59,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2021-11-25 18:02:00,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990506737] [2021-11-25 18:02:00,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990506737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:00,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:00,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894049722] [2021-11-25 18:02:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:00,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:02:00,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:02:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:02:00,297 INFO L87 Difference]: Start difference. First operand 10893 states and 15252 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, (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 18:02:02,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:06,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:08,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:10,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:13,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:17,026 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 18:02:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:17,133 INFO L93 Difference]: Finished difference Result 21467 states and 30087 transitions. [2021-11-25 18:02:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:02:17,135 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, (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 193 [2021-11-25 18:02:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:17,243 INFO L225 Difference]: With dead ends: 21467 [2021-11-25 18:02:17,244 INFO L226 Difference]: Without dead ends: 21465 [2021-11-25 18:02:17,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:02:17,255 INFO L933 BasicCegarLoop]: 2215 mSDtfsCounter, 1965 mSDsluCounter, 6973 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 8328 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:17,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1977 Valid, 8328 Invalid, 1172 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1167 Invalid, 3 Unknown, 0 Unchecked, 16.1s Time] [2021-11-25 18:02:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21465 states. [2021-11-25 18:02:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21465 to 21458. [2021-11-25 18:02:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21458 states, 12467 states have (on average 1.2646988048447902) internal successors, (15767), 13037 states have internal predecessors, (15767), 7142 states have call successors, (7142), 1884 states have call predecessors, (7142), 1846 states have return successors, (7172), 6882 states have call predecessors, (7172), 7134 states have call successors, (7172) [2021-11-25 18:02:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21458 states to 21458 states and 30081 transitions. [2021-11-25 18:02:18,518 INFO L78 Accepts]: Start accepts. Automaton has 21458 states and 30081 transitions. Word has length 193 [2021-11-25 18:02:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:18,520 INFO L470 AbstractCegarLoop]: Abstraction has 21458 states and 30081 transitions. [2021-11-25 18:02:18,520 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, (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 18:02:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 21458 states and 30081 transitions. [2021-11-25 18:02:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-25 18:02:18,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:18,526 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:18,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:02:18,526 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 18:02:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1239307338, now seen corresponding path program 1 times [2021-11-25 18:02:18,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355595721] [2021-11-25 18:02:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:18,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-25 18:02:19,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355595721] [2021-11-25 18:02:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355595721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:19,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:19,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:19,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513824517] [2021-11-25 18:02:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:02:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:02:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:02:19,082 INFO L87 Difference]: Start difference. First operand 21458 states and 30081 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:02:21,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:25,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:27,605 WARN L534 Checker$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 18:02:29,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:32,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:35,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:35,291 INFO L93 Difference]: Finished difference Result 21471 states and 30090 transitions. [2021-11-25 18:02:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:02:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 202 [2021-11-25 18:02:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:35,389 INFO L225 Difference]: With dead ends: 21471 [2021-11-25 18:02:35,390 INFO L226 Difference]: Without dead ends: 21469 [2021-11-25 18:02:35,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:02:35,402 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1959 mSDsluCounter, 6973 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:35,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 8331 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1167 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2021-11-25 18:02:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21469 states. [2021-11-25 18:02:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21469 to 21462. [2021-11-25 18:02:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21462 states, 12470 states have (on average 1.264635124298316) internal successors, (15770), 13040 states have internal predecessors, (15770), 7142 states have call successors, (7142), 1885 states have call predecessors, (7142), 1847 states have return successors, (7172), 6882 states have call predecessors, (7172), 7134 states have call successors, (7172) [2021-11-25 18:02:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21462 states to 21462 states and 30084 transitions. [2021-11-25 18:02:36,522 INFO L78 Accepts]: Start accepts. Automaton has 21462 states and 30084 transitions. Word has length 202 [2021-11-25 18:02:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:36,523 INFO L470 AbstractCegarLoop]: Abstraction has 21462 states and 30084 transitions. [2021-11-25 18:02:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:02:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21462 states and 30084 transitions. [2021-11-25 18:02:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-25 18:02:36,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:36,529 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:36,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:02:36,529 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:02:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1975114191, now seen corresponding path program 1 times [2021-11-25 18:02:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166133543] [2021-11-25 18:02:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:36,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-25 18:02:37,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166133543] [2021-11-25 18:02:37,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166133543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:37,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:37,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:37,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136448757] [2021-11-25 18:02:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:37,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:02:37,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:02:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:02:37,055 INFO L87 Difference]: Start difference. First operand 21462 states and 30084 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:02:39,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:44,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:49,825 WARN L534 Checker$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 18:02:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:50,054 INFO L93 Difference]: Finished difference Result 31950 states and 44779 transitions. [2021-11-25 18:02:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:02:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 206 [2021-11-25 18:02:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:50,197 INFO L225 Difference]: With dead ends: 31950 [2021-11-25 18:02:50,197 INFO L226 Difference]: Without dead ends: 31948 [2021-11-25 18:02:50,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:02:50,211 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:50,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-25 18:02:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31948 states. [2021-11-25 18:02:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31948 to 31941. [2021-11-25 18:02:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31941 states, 18554 states have (on average 1.264956343645575) internal successors, (23470), 19403 states have internal predecessors, (23470), 10629 states have call successors, (10629), 2812 states have call predecessors, (10629), 2755 states have return successors, (10674), 10239 states have call predecessors, (10674), 10617 states have call successors, (10674) [2021-11-25 18:02:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31941 states to 31941 states and 44773 transitions. [2021-11-25 18:02:51,885 INFO L78 Accepts]: Start accepts. Automaton has 31941 states and 44773 transitions. Word has length 206 [2021-11-25 18:02:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:51,886 INFO L470 AbstractCegarLoop]: Abstraction has 31941 states and 44773 transitions. [2021-11-25 18:02:51,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:02:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 31941 states and 44773 transitions. [2021-11-25 18:02:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-25 18:02:51,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:51,892 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:02:51,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:02:51,892 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 18:02:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:51,893 INFO L85 PathProgramCache]: Analyzing trace with hash 630795475, now seen corresponding path program 1 times [2021-11-25 18:02:51,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:51,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424055998] [2021-11-25 18:02:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:51,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-11-25 18:02:52,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:52,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424055998] [2021-11-25 18:02:52,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424055998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:52,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:52,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:02:52,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151373245] [2021-11-25 18:02:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:02:52,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:02:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:02:52,435 INFO L87 Difference]: Start difference. First operand 31941 states and 44773 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 18:02:54,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:02:59,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:00,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:02,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:05,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:09,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:09,138 INFO L93 Difference]: Finished difference Result 31958 states and 44786 transitions. [2021-11-25 18:03:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:09,140 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 208 [2021-11-25 18:03:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:09,254 INFO L225 Difference]: With dead ends: 31958 [2021-11-25 18:03:09,254 INFO L226 Difference]: Without dead ends: 31956 [2021-11-25 18:03:09,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:03:09,267 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1960 mSDsluCounter, 6973 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1969 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:09,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1969 Valid, 8331 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1168 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2021-11-25 18:03:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31956 states. [2021-11-25 18:03:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31956 to 31949. [2021-11-25 18:03:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31949 states, 18560 states have (on average 1.2648706896551725) internal successors, (23476), 19409 states have internal predecessors, (23476), 10629 states have call successors, (10629), 2814 states have call predecessors, (10629), 2757 states have return successors, (10674), 10239 states have call predecessors, (10674), 10617 states have call successors, (10674) [2021-11-25 18:03:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31949 states to 31949 states and 44779 transitions. [2021-11-25 18:03:10,979 INFO L78 Accepts]: Start accepts. Automaton has 31949 states and 44779 transitions. Word has length 208 [2021-11-25 18:03:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:10,980 INFO L470 AbstractCegarLoop]: Abstraction has 31949 states and 44779 transitions. [2021-11-25 18:03:10,980 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 18:03:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 31949 states and 44779 transitions. [2021-11-25 18:03:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-25 18:03:11,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:11,003 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:11,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:03:11,003 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 18:03:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -801328874, now seen corresponding path program 1 times [2021-11-25 18:03:11,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933932557] [2021-11-25 18:03:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:11,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-11-25 18:03:11,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:11,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933932557] [2021-11-25 18:03:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933932557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:11,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:11,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:11,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313636086] [2021-11-25 18:03:11,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:11,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:03:11,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:03:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:03:11,581 INFO L87 Difference]: Start difference. First operand 31949 states and 44779 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:03:13,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:18,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:20,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:22,085 WARN L534 Checker$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 18:03:25,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:28,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:30,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:30,225 INFO L93 Difference]: Finished difference Result 31966 states and 44792 transitions. [2021-11-25 18:03:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 217 [2021-11-25 18:03:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:30,359 INFO L225 Difference]: With dead ends: 31966 [2021-11-25 18:03:30,360 INFO L226 Difference]: Without dead ends: 31964 [2021-11-25 18:03:30,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:03:30,376 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1959 mSDsluCounter, 6974 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:30,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1967 Valid, 8331 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1168 Invalid, 3 Unknown, 0 Unchecked, 17.6s Time] [2021-11-25 18:03:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-11-25 18:03:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 31957. [2021-11-25 18:03:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31957 states, 18566 states have (on average 1.2647850910266079) internal successors, (23482), 19415 states have internal predecessors, (23482), 10629 states have call successors, (10629), 2816 states have call predecessors, (10629), 2759 states have return successors, (10674), 10239 states have call predecessors, (10674), 10617 states have call successors, (10674) [2021-11-25 18:03:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31957 states to 31957 states and 44785 transitions. [2021-11-25 18:03:31,929 INFO L78 Accepts]: Start accepts. Automaton has 31957 states and 44785 transitions. Word has length 217 [2021-11-25 18:03:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:31,930 INFO L470 AbstractCegarLoop]: Abstraction has 31957 states and 44785 transitions. [2021-11-25 18:03:31,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:03:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 31957 states and 44785 transitions. [2021-11-25 18:03:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-25 18:03:31,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:31,937 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:31,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:03:31,938 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 18:03:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -174189878, now seen corresponding path program 1 times [2021-11-25 18:03:31,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360905281] [2021-11-25 18:03:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:31,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-11-25 18:03:32,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360905281] [2021-11-25 18:03:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360905281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:32,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:32,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:32,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816911821] [2021-11-25 18:03:32,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:32,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:03:32,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:32,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:03:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:03:32,444 INFO L87 Difference]: Start difference. First operand 31957 states and 44785 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:03:34,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:39,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:41,077 WARN L534 Checker$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 18:03:42,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:46,260 WARN L534 Checker$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 18:03:49,745 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 18:03:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:49,854 INFO L93 Difference]: Finished difference Result 31974 states and 44798 transitions. [2021-11-25 18:03:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:03:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 222 [2021-11-25 18:03:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:49,958 INFO L225 Difference]: With dead ends: 31974 [2021-11-25 18:03:49,958 INFO L226 Difference]: Without dead ends: 31972 [2021-11-25 18:03:49,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:03:49,974 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1959 mSDsluCounter, 6973 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:49,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 8331 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1166 Invalid, 4 Unknown, 0 Unchecked, 16.3s Time] [2021-11-25 18:03:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31972 states. [2021-11-25 18:03:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31972 to 31965. [2021-11-25 18:03:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31965 states, 18572 states have (on average 1.2646995477062244) internal successors, (23488), 19421 states have internal predecessors, (23488), 10629 states have call successors, (10629), 2818 states have call predecessors, (10629), 2761 states have return successors, (10674), 10239 states have call predecessors, (10674), 10617 states have call successors, (10674) [2021-11-25 18:03:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31965 states to 31965 states and 44791 transitions. [2021-11-25 18:03:51,573 INFO L78 Accepts]: Start accepts. Automaton has 31965 states and 44791 transitions. Word has length 222 [2021-11-25 18:03:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:51,574 INFO L470 AbstractCegarLoop]: Abstraction has 31965 states and 44791 transitions. [2021-11-25 18:03:51,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 18:03:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 31965 states and 44791 transitions. [2021-11-25 18:03:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 18:03:51,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:51,590 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 7, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:03:51,590 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 18:03:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash 775723825, now seen corresponding path program 1 times [2021-11-25 18:03:51,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:51,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153644066] [2021-11-25 18:03:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:51,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2021-11-25 18:03:52,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153644066] [2021-11-25 18:03:52,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153644066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:52,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:52,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:03:52,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789155455] [2021-11-25 18:03:52,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:52,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:03:52,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:03:52,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:03:52,284 INFO L87 Difference]: Start difference. First operand 31965 states and 44791 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:03:54,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:03:59,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:05,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:05,737 INFO L93 Difference]: Finished difference Result 50493 states and 70542 transitions. [2021-11-25 18:04:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 226 [2021-11-25 18:04:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:06,002 INFO L225 Difference]: With dead ends: 50493 [2021-11-25 18:04:06,003 INFO L226 Difference]: Without dead ends: 50491 [2021-11-25 18:04:06,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:04:06,017 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 1806 mSDsluCounter, 7138 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 8458 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:06,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 8458 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1354 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2021-11-25 18:04:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50491 states. [2021-11-25 18:04:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50491 to 50462. [2021-11-25 18:04:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 29403 states have (on average 1.2656871747780838) internal successors, (37215), 30780 states have internal predecessors, (37215), 16553 states have call successors, (16553), 4668 states have call predecessors, (16553), 4503 states have return successors, (16744), 15757 states have call predecessors, (16744), 16533 states have call successors, (16744) [2021-11-25 18:04:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 70512 transitions. [2021-11-25 18:04:08,201 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 70512 transitions. Word has length 226 [2021-11-25 18:04:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:08,201 INFO L470 AbstractCegarLoop]: Abstraction has 50462 states and 70512 transitions. [2021-11-25 18:04:08,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:04:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 70512 transitions. [2021-11-25 18:04:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-25 18:04:08,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:08,210 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:08,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:04:08,211 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 18:04:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -937860598, now seen corresponding path program 1 times [2021-11-25 18:04:08,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14844617] [2021-11-25 18:04:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:08,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 859 trivial. 0 not checked. [2021-11-25 18:04:08,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:08,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14844617] [2021-11-25 18:04:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14844617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:08,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:04:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662737713] [2021-11-25 18:04:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:08,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:08,898 INFO L87 Difference]: Start difference. First operand 50462 states and 70512 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:04:10,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:16,216 WARN L534 Checker$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 18:04:21,980 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 18:04:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:22,399 INFO L93 Difference]: Finished difference Result 50475 states and 70521 transitions. [2021-11-25 18:04:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 232 [2021-11-25 18:04:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:22,532 INFO L225 Difference]: With dead ends: 50475 [2021-11-25 18:04:22,532 INFO L226 Difference]: Without dead ends: 50473 [2021-11-25 18:04:22,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:04:22,551 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:22,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2021-11-25 18:04:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50473 states. [2021-11-25 18:04:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50473 to 50466. [2021-11-25 18:04:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50466 states, 29406 states have (on average 1.2656600693735973) internal successors, (37218), 30783 states have internal predecessors, (37218), 16553 states have call successors, (16553), 4669 states have call predecessors, (16553), 4504 states have return successors, (16744), 15757 states have call predecessors, (16744), 16533 states have call successors, (16744) [2021-11-25 18:04:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50466 states to 50466 states and 70515 transitions. [2021-11-25 18:04:24,750 INFO L78 Accepts]: Start accepts. Automaton has 50466 states and 70515 transitions. Word has length 232 [2021-11-25 18:04:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:24,750 INFO L470 AbstractCegarLoop]: Abstraction has 50466 states and 70515 transitions. [2021-11-25 18:04:24,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:04:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 50466 states and 70515 transitions. [2021-11-25 18:04:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-25 18:04:24,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:24,760 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:24,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:04:24,761 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 18:04:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2095391126, now seen corresponding path program 1 times [2021-11-25 18:04:24,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126006538] [2021-11-25 18:04:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:24,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2021-11-25 18:04:25,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126006538] [2021-11-25 18:04:25,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126006538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:25,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:25,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:04:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433793782] [2021-11-25 18:04:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:25,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:25,492 INFO L87 Difference]: Start difference. First operand 50466 states and 70515 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:04:27,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:32,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:34,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:35,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:39,711 WARN L534 Checker$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 18:04:42,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:43,046 INFO L93 Difference]: Finished difference Result 50487 states and 70532 transitions. [2021-11-25 18:04:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 237 [2021-11-25 18:04:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:43,297 INFO L225 Difference]: With dead ends: 50487 [2021-11-25 18:04:43,297 INFO L226 Difference]: Without dead ends: 50485 [2021-11-25 18:04:43,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:04:43,310 INFO L933 BasicCegarLoop]: 2218 mSDtfsCounter, 1959 mSDsluCounter, 6973 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 8331 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:43,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 8331 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1168 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2021-11-25 18:04:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50485 states. [2021-11-25 18:04:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50485 to 50478. [2021-11-25 18:04:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50478 states, 29415 states have (on average 1.2655787863335033) internal successors, (37227), 30792 states have internal predecessors, (37227), 16553 states have call successors, (16553), 4672 states have call predecessors, (16553), 4507 states have return successors, (16744), 15757 states have call predecessors, (16744), 16533 states have call successors, (16744) [2021-11-25 18:04:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50478 states to 50478 states and 70524 transitions. [2021-11-25 18:04:45,444 INFO L78 Accepts]: Start accepts. Automaton has 50478 states and 70524 transitions. Word has length 237 [2021-11-25 18:04:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:45,444 INFO L470 AbstractCegarLoop]: Abstraction has 50478 states and 70524 transitions. [2021-11-25 18:04:45,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 18:04:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50478 states and 70524 transitions. [2021-11-25 18:04:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-25 18:04:45,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:45,454 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 10, 9, 9, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:45,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:04:45,455 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 18:04:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -342077110, now seen corresponding path program 1 times [2021-11-25 18:04:45,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292214043] [2021-11-25 18:04:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:45,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2021-11-25 18:04:45,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292214043] [2021-11-25 18:04:45,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292214043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:45,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:45,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:04:45,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019641201] [2021-11-25 18:04:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:45,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:45,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:45,959 INFO L87 Difference]: Start difference. First operand 50478 states and 70524 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 18:04:48,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:53,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:04:59,575 WARN L534 Checker$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 18:04:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:59,935 INFO L93 Difference]: Finished difference Result 50491 states and 70533 transitions. [2021-11-25 18:04:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 242 [2021-11-25 18:04:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:00,174 INFO L225 Difference]: With dead ends: 50491 [2021-11-25 18:05:00,174 INFO L226 Difference]: Without dead ends: 50489 [2021-11-25 18:05:00,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:05:00,187 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:00,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1888 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2021-11-25 18:05:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50489 states. [2021-11-25 18:05:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50489 to 50482. [2021-11-25 18:05:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 29418 states have (on average 1.2655517030389558) internal successors, (37230), 30795 states have internal predecessors, (37230), 16553 states have call successors, (16553), 4673 states have call predecessors, (16553), 4508 states have return successors, (16744), 15757 states have call predecessors, (16744), 16533 states have call successors, (16744) [2021-11-25 18:05:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 70527 transitions. [2021-11-25 18:05:02,175 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 70527 transitions. Word has length 242 [2021-11-25 18:05:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 50482 states and 70527 transitions. [2021-11-25 18:05:02,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 18:05:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 70527 transitions. [2021-11-25 18:05:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 18:05:02,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:02,184 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:02,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:05:02,184 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 18:05:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash -260747215, now seen corresponding path program 1 times [2021-11-25 18:05:02,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367941906] [2021-11-25 18:05:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:02,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2021-11-25 18:05:02,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:02,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367941906] [2021-11-25 18:05:02,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367941906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:02,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:02,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:05:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271406200] [2021-11-25 18:05:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:05:02,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:05:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:02,674 INFO L87 Difference]: Start difference. First operand 50482 states and 70527 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:05:04,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:10,250 WARN L534 Checker$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 18:05:16,256 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 18:05:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:16,718 INFO L93 Difference]: Finished difference Result 50495 states and 70536 transitions. [2021-11-25 18:05:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 246 [2021-11-25 18:05:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:16,909 INFO L225 Difference]: With dead ends: 50495 [2021-11-25 18:05:16,909 INFO L226 Difference]: Without dead ends: 50493 [2021-11-25 18:05:16,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:05:16,935 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1885 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 8715 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:16,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 8715 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-25 18:05:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50493 states. [2021-11-25 18:05:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50493 to 50486. [2021-11-25 18:05:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50486 states, 29421 states have (on average 1.265524625267666) internal successors, (37233), 30798 states have internal predecessors, (37233), 16553 states have call successors, (16553), 4674 states have call predecessors, (16553), 4509 states have return successors, (16744), 15757 states have call predecessors, (16744), 16533 states have call successors, (16744) [2021-11-25 18:05:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50486 states to 50486 states and 70530 transitions. [2021-11-25 18:05:19,102 INFO L78 Accepts]: Start accepts. Automaton has 50486 states and 70530 transitions. Word has length 246 [2021-11-25 18:05:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:19,103 INFO L470 AbstractCegarLoop]: Abstraction has 50486 states and 70530 transitions. [2021-11-25 18:05:19,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:05:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 50486 states and 70530 transitions. [2021-11-25 18:05:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 18:05:19,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:19,112 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:19,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:05:19,112 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 18:05:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1179501809, now seen corresponding path program 1 times [2021-11-25 18:05:19,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458482602] [2021-11-25 18:05:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:19,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-11-25 18:05:19,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:19,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458482602] [2021-11-25 18:05:19,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458482602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:19,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:05:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238911427] [2021-11-25 18:05:19,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:05:19,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:05:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:19,830 INFO L87 Difference]: Start difference. First operand 50486 states and 70530 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 18:05:21,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:26,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:27,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:29,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:34,082 WARN L534 Checker$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 18:05:37,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:37,944 INFO L93 Difference]: Finished difference Result 69456 states and 97044 transitions. [2021-11-25 18:05:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 251 [2021-11-25 18:05:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:38,129 INFO L225 Difference]: With dead ends: 69456 [2021-11-25 18:05:38,129 INFO L226 Difference]: Without dead ends: 69452 [2021-11-25 18:05:38,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:05:38,147 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 1904 mSDsluCounter, 6929 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 8274 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:38,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1905 Valid, 8274 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1165 Invalid, 2 Unknown, 0 Unchecked, 15.9s Time] [2021-11-25 18:05:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69452 states. [2021-11-25 18:05:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69452 to 69430. [2021-11-25 18:05:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69430 states, 40528 states have (on average 1.268258981444927) internal successors, (51400), 42468 states have internal predecessors, (51400), 22641 states have call successors, (22641), 6513 states have call predecessors, (22641), 6258 states have return successors, (22976), 21474 states have call predecessors, (22976), 22613 states have call successors, (22976) [2021-11-25 18:05:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69430 states to 69430 states and 97017 transitions. [2021-11-25 18:05:41,147 INFO L78 Accepts]: Start accepts. Automaton has 69430 states and 97017 transitions. Word has length 251 [2021-11-25 18:05:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:41,148 INFO L470 AbstractCegarLoop]: Abstraction has 69430 states and 97017 transitions. [2021-11-25 18:05:41,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 18:05:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 69430 states and 97017 transitions. [2021-11-25 18:05:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-25 18:05:41,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:41,157 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 13, 12, 12, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:41,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:05:41,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:05:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1625142419, now seen corresponding path program 1 times [2021-11-25 18:05:41,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:41,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215203743] [2021-11-25 18:05:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:41,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2021-11-25 18:05:41,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215203743] [2021-11-25 18:05:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215203743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:41,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:05:41,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85345580] [2021-11-25 18:05:41,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:41,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:05:41,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:05:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:05:41,681 INFO L87 Difference]: Start difference. First operand 69430 states and 97017 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, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:05:44,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:49,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:05:55,616 WARN L534 Checker$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 18:05:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:56,447 INFO L93 Difference]: Finished difference Result 69437 states and 97021 transitions. [2021-11-25 18:05:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:05:56,458 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, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 253 [2021-11-25 18:05:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:56,676 INFO L225 Difference]: With dead ends: 69437 [2021-11-25 18:05:56,676 INFO L226 Difference]: Without dead ends: 69277 [2021-11-25 18:05:56,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:05:56,704 INFO L933 BasicCegarLoop]: 2346 mSDtfsCounter, 1882 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 8717 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:56,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 8717 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1385 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-25 18:05:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69277 states. [2021-11-25 18:05:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69277 to 69272. [2021-11-25 18:05:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69272 states, 40474 states have (on average 1.267727429955033) internal successors, (51310), 42379 states have internal predecessors, (51310), 22553 states have call successors, (22553), 6487 states have call predecessors, (22553), 6242 states have return successors, (22892), 21431 states have call predecessors, (22892), 22529 states have call successors, (22892) [2021-11-25 18:05:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69272 states to 69272 states and 96755 transitions. [2021-11-25 18:05:59,895 INFO L78 Accepts]: Start accepts. Automaton has 69272 states and 96755 transitions. Word has length 253 [2021-11-25 18:05:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:59,912 INFO L470 AbstractCegarLoop]: Abstraction has 69272 states and 96755 transitions. [2021-11-25 18:05:59,912 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, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:05:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 69272 states and 96755 transitions. [2021-11-25 18:05:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-25 18:05:59,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:59,921 INFO L514 BasicCegarLoop]: trace histogram [19, 13, 13, 13, 13, 13, 13, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:59,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:05:59,921 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 18:05:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash -315234821, now seen corresponding path program 1 times [2021-11-25 18:05:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486676041] [2021-11-25 18:05:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:59,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2021-11-25 18:06:00,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486676041] [2021-11-25 18:06:00,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486676041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:00,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:00,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:00,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333164056] [2021-11-25 18:06:00,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:00,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:00,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:00,373 INFO L87 Difference]: Start difference. First operand 69272 states and 96755 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 18:06:02,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:07,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:09,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:06:14,361 WARN L534 Checker$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 18:06:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:15,828 INFO L93 Difference]: Finished difference Result 155702 states and 217461 transitions. [2021-11-25 18:06:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 253 [2021-11-25 18:06:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:16,148 INFO L225 Difference]: With dead ends: 155702 [2021-11-25 18:06:16,149 INFO L226 Difference]: Without dead ends: 86753 [2021-11-25 18:06:16,484 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 18:06:16,484 INFO L933 BasicCegarLoop]: 2750 mSDtfsCounter, 1240 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 4445 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:16,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 4445 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 822 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2021-11-25 18:06:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86753 states. [2021-11-25 18:06:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86753 to 86510. [2021-11-25 18:06:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86510 states, 50804 states have (on average 1.2669278009605542) internal successors, (64365), 53164 states have internal predecessors, (64365), 27853 states have call successors, (27853), 8154 states have call predecessors, (27853), 7850 states have return successors, (28222), 26455 states have call predecessors, (28222), 27829 states have call successors, (28222)