./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-mutex_fs-binfmt_misc.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur --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 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:32:02,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:32:02,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:32:02,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:32:02,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:32:02,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:32:02,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:32:02,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:32:02,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:32:02,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:32:02,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:32:02,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:32:02,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:32:02,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:32:02,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:32:02,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:32:02,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:32:02,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:32:02,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:32:02,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:32:02,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:32:02,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:32:02,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:32:02,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:32:02,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:32:02,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:32:02,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:32:02,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:32:02,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:32:02,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:32:02,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:32:02,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:32:02,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:32:02,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:32:02,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:32:02,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:32:02,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:32:02,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:32:02,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:32:02,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:32:02,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:32:02,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 23:32:02,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:32:02,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:32:02,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:32:02,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:32:02,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:32:02,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:32:02,874 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:32:02,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:32:02,875 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:32:02,875 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:32:02,875 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:32:02,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:32:02,875 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:32:02,876 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:32:02,876 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:32:02,876 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:32:02,876 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:32:02,876 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:32:02,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:32:02,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:32:02,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:32:02,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:32:02,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:32:02,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:32:02,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:32:02,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:32:02,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:32:02,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:32:02,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:32:02,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:02,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:32:02,882 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:32:02,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:32:02,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:32:02,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:32:02,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:32:02,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:32:02,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:32:02,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2022-11-25 23:32:03,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:32:03,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:32:03,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:32:03,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:32:03,198 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:32:03,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-25 23:32:06,374 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:32:06,951 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:32:06,952 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-25 23:32:06,989 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/data/ca2453e1b/558291cf13a5444ea16fb3e2f5db35f2/FLAGf9a321b4b [2022-11-25 23:32:07,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/data/ca2453e1b/558291cf13a5444ea16fb3e2f5db35f2 [2022-11-25 23:32:07,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:32:07,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:32:07,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:07,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:32:07,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:32:07,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:07" (1/1) ... [2022-11-25 23:32:07,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1932a2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:07, skipping insertion in model container [2022-11-25 23:32:07,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:07" (1/1) ... [2022-11-25 23:32:07,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:32:07,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:32:07,742 WARN L623 FunctionHandler]: Unknown extern function __list_add [2022-11-25 23:32:07,759 WARN L623 FunctionHandler]: Unknown extern function __list_del_entry [2022-11-25 23:32:07,932 WARN L623 FunctionHandler]: Unknown extern function lockref_get [2022-11-25 23:32:08,110 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 23:32:08,111 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-25 23:32:08,114 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-25 23:32:08,115 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-11-25 23:32:08,126 WARN L623 FunctionHandler]: Unknown extern function __register_binfmt [2022-11-25 23:32:08,183 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,202 WARN L623 FunctionHandler]: Unknown extern function string_unescape [2022-11-25 23:32:08,254 WARN L623 FunctionHandler]: Unknown extern function strrchr [2022-11-25 23:32:08,294 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-11-25 23:32:08,295 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 23:32:08,297 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-11-25 23:32:08,299 WARN L623 FunctionHandler]: Unknown extern function remove_arg_zero [2022-11-25 23:32:08,302 WARN L623 FunctionHandler]: Unknown extern function get_unused_fd_flags [2022-11-25 23:32:08,304 WARN L623 FunctionHandler]: Unknown extern function fd_install [2022-11-25 23:32:08,305 WARN L623 FunctionHandler]: Unknown extern function would_dump [2022-11-25 23:32:08,308 WARN L623 FunctionHandler]: Unknown extern function fput [2022-11-25 23:32:08,309 WARN L623 FunctionHandler]: Unknown extern function copy_strings_kernel [2022-11-25 23:32:08,310 WARN L623 FunctionHandler]: Unknown extern function copy_strings_kernel [2022-11-25 23:32:08,313 WARN L623 FunctionHandler]: Unknown extern function bprm_change_interp [2022-11-25 23:32:08,314 WARN L623 FunctionHandler]: Unknown extern function open_exec [2022-11-25 23:32:08,318 WARN L623 FunctionHandler]: Unknown extern function kernel_read [2022-11-25 23:32:08,320 WARN L623 FunctionHandler]: Unknown extern function prepare_binprm [2022-11-25 23:32:08,321 WARN L623 FunctionHandler]: Unknown extern function search_binary_handler [2022-11-25 23:32:08,322 WARN L623 FunctionHandler]: Unknown extern function sys_close [2022-11-25 23:32:08,391 WARN L623 FunctionHandler]: Unknown extern function simple_strtoul [2022-11-25 23:32:08,451 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:08,455 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:08,472 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,477 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,486 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,491 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,492 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,494 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,496 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:08,501 WARN L623 FunctionHandler]: Unknown extern function new_inode [2022-11-25 23:32:08,504 WARN L623 FunctionHandler]: Unknown extern function get_next_ino [2022-11-25 23:32:08,505 WARN L623 FunctionHandler]: Unknown extern function current_fs_time [2022-11-25 23:32:08,510 WARN L623 FunctionHandler]: Unknown extern function clear_inode [2022-11-25 23:32:08,511 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:08,515 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock [2022-11-25 23:32:08,516 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock [2022-11-25 23:32:08,516 WARN L623 FunctionHandler]: Unknown extern function drop_nlink [2022-11-25 23:32:08,517 WARN L623 FunctionHandler]: Unknown extern function d_drop [2022-11-25 23:32:08,518 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:08,518 WARN L623 FunctionHandler]: Unknown extern function simple_release_fs [2022-11-25 23:32:08,522 WARN L623 FunctionHandler]: Unknown extern function __get_free_pages [2022-11-25 23:32:08,524 WARN L623 FunctionHandler]: Unknown extern function simple_read_from_buffer [2022-11-25 23:32:08,525 WARN L623 FunctionHandler]: Unknown extern function free_pages [2022-11-25 23:32:08,533 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:08,549 WARN L623 FunctionHandler]: Unknown extern function lookup_one_len [2022-11-25 23:32:08,555 WARN L623 FunctionHandler]: Unknown extern function simple_pin_fs [2022-11-25 23:32:08,557 WARN L623 FunctionHandler]: Unknown extern function iput [2022-11-25 23:32:08,558 WARN L623 FunctionHandler]: Unknown extern function d_instantiate [2022-11-25 23:32:08,559 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock [2022-11-25 23:32:08,559 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock [2022-11-25 23:32:08,560 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:08,560 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:08,561 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:08,568 WARN L623 FunctionHandler]: Unknown extern function simple_read_from_buffer [2022-11-25 23:32:08,578 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:08,591 WARN L623 FunctionHandler]: Unknown extern function simple_fill_super [2022-11-25 23:32:08,596 WARN L623 FunctionHandler]: Unknown extern function mount_single [2022-11-25 23:32:08,616 WARN L623 FunctionHandler]: Unknown extern function unregister_binfmt [2022-11-25 23:32:08,780 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,781 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,781 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,782 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,783 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,783 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,784 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,784 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,784 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,785 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,785 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,785 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,786 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,786 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,787 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,787 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,787 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,788 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,789 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,789 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,789 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,789 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,790 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,790 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:08,793 WARN L623 FunctionHandler]: Unknown extern function kill_litter_super [2022-11-25 23:32:08,796 WARN L623 FunctionHandler]: Unknown extern function simple_statfs [2022-11-25 23:32:08,843 WARN L623 FunctionHandler]: Unknown extern function default_llseek [2022-11-25 23:32:08,849 WARN L623 FunctionHandler]: Unknown extern function noop_llseek [2022-11-25 23:32:08,852 WARN L623 FunctionHandler]: Unknown extern function default_llseek [2022-11-25 23:32:08,871 WARN L623 FunctionHandler]: Unknown extern function register_filesystem [2022-11-25 23:32:08,872 WARN L623 FunctionHandler]: Unknown extern function unregister_filesystem [2022-11-25 23:32:08,918 WARN L623 FunctionHandler]: Unknown extern function ldv_check_alloc_flags [2022-11-25 23:32:08,919 WARN L623 FunctionHandler]: Unknown extern function ldv_after_alloc [2022-11-25 23:32:08,928 WARN L623 FunctionHandler]: Unknown extern function ldv_assert [2022-11-25 23:32:09,057 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2022-11-25 23:32:09,060 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2022-11-25 23:32:09,061 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2022-11-25 23:32:09,062 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2022-11-25 23:32:09,071 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,072 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,072 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,073 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:09,101 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:32:09,179 WARN L623 FunctionHandler]: Unknown extern function __list_add [2022-11-25 23:32:09,180 WARN L623 FunctionHandler]: Unknown extern function __list_del_entry [2022-11-25 23:32:09,189 WARN L623 FunctionHandler]: Unknown extern function lockref_get [2022-11-25 23:32:09,196 WARN L623 FunctionHandler]: Unknown extern function might_fault [2022-11-25 23:32:09,197 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-25 23:32:09,197 WARN L623 FunctionHandler]: Unknown extern function _copy_from_user [2022-11-25 23:32:09,199 WARN L623 FunctionHandler]: Unknown extern function __copy_from_user_overflow [2022-11-25 23:32:09,199 WARN L623 FunctionHandler]: Unknown extern function __register_binfmt [2022-11-25 23:32:09,200 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,201 WARN L623 FunctionHandler]: Unknown extern function string_unescape [2022-11-25 23:32:09,203 WARN L623 FunctionHandler]: Unknown extern function strrchr [2022-11-25 23:32:09,209 WARN L623 FunctionHandler]: Unknown extern function _raw_read_lock [2022-11-25 23:32:09,210 WARN L623 FunctionHandler]: Unknown extern function strlcpy [2022-11-25 23:32:09,211 WARN L623 FunctionHandler]: Unknown extern function _raw_read_unlock [2022-11-25 23:32:09,214 WARN L623 FunctionHandler]: Unknown extern function remove_arg_zero [2022-11-25 23:32:09,214 WARN L623 FunctionHandler]: Unknown extern function get_unused_fd_flags [2022-11-25 23:32:09,215 WARN L623 FunctionHandler]: Unknown extern function fd_install [2022-11-25 23:32:09,216 WARN L623 FunctionHandler]: Unknown extern function would_dump [2022-11-25 23:32:09,217 WARN L623 FunctionHandler]: Unknown extern function fput [2022-11-25 23:32:09,218 WARN L623 FunctionHandler]: Unknown extern function copy_strings_kernel [2022-11-25 23:32:09,218 WARN L623 FunctionHandler]: Unknown extern function copy_strings_kernel [2022-11-25 23:32:09,219 WARN L623 FunctionHandler]: Unknown extern function bprm_change_interp [2022-11-25 23:32:09,225 WARN L623 FunctionHandler]: Unknown extern function open_exec [2022-11-25 23:32:09,227 WARN L623 FunctionHandler]: Unknown extern function kernel_read [2022-11-25 23:32:09,227 WARN L623 FunctionHandler]: Unknown extern function prepare_binprm [2022-11-25 23:32:09,228 WARN L623 FunctionHandler]: Unknown extern function search_binary_handler [2022-11-25 23:32:09,228 WARN L623 FunctionHandler]: Unknown extern function sys_close [2022-11-25 23:32:09,246 WARN L623 FunctionHandler]: Unknown extern function simple_strtoul [2022-11-25 23:32:09,264 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:09,265 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:09,271 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,274 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,277 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,277 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,279 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,282 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,285 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-11-25 23:32:09,288 WARN L623 FunctionHandler]: Unknown extern function new_inode [2022-11-25 23:32:09,289 WARN L623 FunctionHandler]: Unknown extern function get_next_ino [2022-11-25 23:32:09,289 WARN L623 FunctionHandler]: Unknown extern function current_fs_time [2022-11-25 23:32:09,295 WARN L623 FunctionHandler]: Unknown extern function clear_inode [2022-11-25 23:32:09,300 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:09,302 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock [2022-11-25 23:32:09,302 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock [2022-11-25 23:32:09,303 WARN L623 FunctionHandler]: Unknown extern function drop_nlink [2022-11-25 23:32:09,305 WARN L623 FunctionHandler]: Unknown extern function d_drop [2022-11-25 23:32:09,305 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:09,306 WARN L623 FunctionHandler]: Unknown extern function simple_release_fs [2022-11-25 23:32:09,306 WARN L623 FunctionHandler]: Unknown extern function __get_free_pages [2022-11-25 23:32:09,307 WARN L623 FunctionHandler]: Unknown extern function simple_read_from_buffer [2022-11-25 23:32:09,308 WARN L623 FunctionHandler]: Unknown extern function free_pages [2022-11-25 23:32:09,311 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:09,314 WARN L623 FunctionHandler]: Unknown extern function lookup_one_len [2022-11-25 23:32:09,317 WARN L623 FunctionHandler]: Unknown extern function simple_pin_fs [2022-11-25 23:32:09,318 WARN L623 FunctionHandler]: Unknown extern function iput [2022-11-25 23:32:09,320 WARN L623 FunctionHandler]: Unknown extern function d_instantiate [2022-11-25 23:32:09,321 WARN L623 FunctionHandler]: Unknown extern function _raw_write_lock [2022-11-25 23:32:09,322 WARN L623 FunctionHandler]: Unknown extern function _raw_write_unlock [2022-11-25 23:32:09,322 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:09,323 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:09,367 WARN L623 FunctionHandler]: Unknown extern function kfree [2022-11-25 23:32:09,368 WARN L623 FunctionHandler]: Unknown extern function simple_read_from_buffer [2022-11-25 23:32:09,370 WARN L623 FunctionHandler]: Unknown extern function dput [2022-11-25 23:32:09,373 WARN L623 FunctionHandler]: Unknown extern function simple_fill_super [2022-11-25 23:32:09,374 WARN L623 FunctionHandler]: Unknown extern function mount_single [2022-11-25 23:32:09,380 WARN L623 FunctionHandler]: Unknown extern function unregister_binfmt [2022-11-25 23:32:09,386 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,386 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,386 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,387 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,387 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,387 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,388 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,388 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,388 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,388 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,389 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,389 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,389 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,390 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,390 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,390 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,390 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,391 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,392 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,392 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,392 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,393 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,393 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,394 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,394 WARN L623 FunctionHandler]: Unknown extern function kill_litter_super [2022-11-25 23:32:09,395 WARN L623 FunctionHandler]: Unknown extern function simple_statfs [2022-11-25 23:32:09,419 WARN L623 FunctionHandler]: Unknown extern function default_llseek [2022-11-25 23:32:09,420 WARN L623 FunctionHandler]: Unknown extern function noop_llseek [2022-11-25 23:32:09,421 WARN L623 FunctionHandler]: Unknown extern function default_llseek [2022-11-25 23:32:09,428 WARN L623 FunctionHandler]: Unknown extern function register_filesystem [2022-11-25 23:32:09,428 WARN L623 FunctionHandler]: Unknown extern function unregister_filesystem [2022-11-25 23:32:09,433 WARN L623 FunctionHandler]: Unknown extern function ldv_check_alloc_flags [2022-11-25 23:32:09,434 WARN L623 FunctionHandler]: Unknown extern function ldv_after_alloc [2022-11-25 23:32:09,434 WARN L623 FunctionHandler]: Unknown extern function ldv_assert [2022-11-25 23:32:09,447 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2022-11-25 23:32:09,448 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2022-11-25 23:32:09,449 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2022-11-25 23:32:09,449 WARN L237 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_251efd44-0b9f-4c78-aad1-61a15a275b72/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2022-11-25 23:32:09,461 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,462 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,462 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,463 WARN L623 FunctionHandler]: Unknown extern function ldv_malloc [2022-11-25 23:32:09,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:09,546 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:32:09,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09 WrapperNode [2022-11-25 23:32:09,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:09,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:09,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:32:09,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:32:09,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,802 INFO L138 Inliner]: procedures = 238, calls = 1015, calls flagged for inlining = 130, calls inlined = 118, statements flattened = 3029 [2022-11-25 23:32:09,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:09,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:32:09,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:32:09,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:32:09,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:09,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:10,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:10,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:10,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:10,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:32:10,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:32:10,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:32:10,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:32:10,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (1/1) ... [2022-11-25 23:32:10,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:10,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:32:10,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:32:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure dput [2022-11-25 23:32:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure dput [2022-11-25 23:32:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-25 23:32:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-25 23:32:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2022-11-25 23:32:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2022-11-25 23:32:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2022-11-25 23:32:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2022-11-25 23:32:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-25 23:32:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-25 23:32:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure dget [2022-11-25 23:32:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure dget [2022-11-25 23:32:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure copy_strings_kernel [2022-11-25 23:32:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_strings_kernel [2022-11-25 23:32:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure simple_statfs [2022-11-25 23:32:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_statfs [2022-11-25 23:32:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 23:32:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 23:32:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-25 23:32:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-25 23:32:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:32:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure kill_node [2022-11-25 23:32:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_node [2022-11-25 23:32:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i_mutex_of_inode [2022-11-25 23:32:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i_mutex_of_inode [2022-11-25 23:32:10,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:32:10,217 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-25 23:32:10,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-25 23:32:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure allow_write_access [2022-11-25 23:32:10,218 INFO L138 BoogieDeclarations]: Found implementation of procedure allow_write_access [2022-11-25 23:32:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-25 23:32:10,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-25 23:32:10,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2022-11-25 23:32:10,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2022-11-25 23:32:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2022-11-25 23:32:10,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2022-11-25 23:32:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:32:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:32:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure bm_evict_inode [2022-11-25 23:32:10,225 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_evict_inode [2022-11-25 23:32:10,225 INFO L130 BoogieDeclarations]: Found specification of procedure kill_litter_super [2022-11-25 23:32:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_litter_super [2022-11-25 23:32:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure simple_read_from_buffer [2022-11-25 23:32:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_read_from_buffer [2022-11-25 23:32:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-25 23:32:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-25 23:32:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-25 23:32:10,226 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-25 23:32:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-25 23:32:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-25 23:32:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure parse_command [2022-11-25 23:32:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_command [2022-11-25 23:32:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:32:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2022-11-25 23:32:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2022-11-25 23:32:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure bm_register_write [2022-11-25 23:32:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_register_write [2022-11-25 23:32:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_read [2022-11-25 23:32:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_read [2022-11-25 23:32:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-25 23:32:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-25 23:32:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-25 23:32:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-25 23:32:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_write [2022-11-25 23:32:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_write [2022-11-25 23:32:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-25 23:32:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-25 23:32:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2022-11-25 23:32:10,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2022-11-25 23:32:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:32:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure scanarg [2022-11-25 23:32:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure scanarg [2022-11-25 23:32:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-25 23:32:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-25 23:32:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:32:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-25 23:32:10,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-25 23:32:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-11-25 23:32:10,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-25 23:32:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-25 23:32:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-25 23:32:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-25 23:32:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2022-11-25 23:32:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2022-11-25 23:32:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-25 23:32:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-25 23:32:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_write [2022-11-25 23:32:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_write [2022-11-25 23:32:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:32:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-25 23:32:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-25 23:32:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:32:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure string_unescape_inplace [2022-11-25 23:32:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure string_unescape_inplace [2022-11-25 23:32:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure default_llseek [2022-11-25 23:32:10,235 INFO L138 BoogieDeclarations]: Found implementation of procedure default_llseek [2022-11-25 23:32:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-25 23:32:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-25 23:32:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_read [2022-11-25 23:32:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_read [2022-11-25 23:32:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-25 23:32:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-25 23:32:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-25 23:32:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-25 23:32:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:32:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-25 23:32:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-25 23:32:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:32:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:32:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i_mutex_of_inode [2022-11-25 23:32:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i_mutex_of_inode [2022-11-25 23:32:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-25 23:32:10,238 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-25 23:32:10,960 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:32:10,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:32:11,227 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-25 23:32:13,160 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-25 23:32:13,222 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:32:13,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:32:13,866 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:32:13,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:13 BoogieIcfgContainer [2022-11-25 23:32:13,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:32:13,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:32:13,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:32:13,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:32:13,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:32:07" (1/3) ... [2022-11-25 23:32:13,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15806771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:13, skipping insertion in model container [2022-11-25 23:32:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:09" (2/3) ... [2022-11-25 23:32:13,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15806771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:13, skipping insertion in model container [2022-11-25 23:32:13,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:13" (3/3) ... [2022-11-25 23:32:13,884 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-25 23:32:13,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:32:13,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-25 23:32:14,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:32:14,020 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5bcc8531, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:32:14,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 23:32:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 766 states, 476 states have (on average 1.3718487394957983) internal successors, (653), 483 states have internal predecessors, (653), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-25 23:32:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-25 23:32:14,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:14,081 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 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] [2022-11-25 23:32:14,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1054409035, now seen corresponding path program 1 times [2022-11-25 23:32:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979234684] [2022-11-25 23:32:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2022-11-25 23:32:15,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979234684] [2022-11-25 23:32:15,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979234684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:15,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:15,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:15,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760103873] [2022-11-25 23:32:15,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:15,126 INFO L87 Difference]: Start difference. First operand has 766 states, 476 states have (on average 1.3718487394957983) internal successors, (653), 483 states have internal predecessors, (653), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-25 23:32:18,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:20,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:20,191 INFO L93 Difference]: Finished difference Result 2128 states and 3158 transitions. [2022-11-25 23:32:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 264 [2022-11-25 23:32:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:20,224 INFO L225 Difference]: With dead ends: 2128 [2022-11-25 23:32:20,224 INFO L226 Difference]: Without dead ends: 1400 [2022-11-25 23:32:20,234 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:20,239 INFO L413 NwaCegarLoop]: 1142 mSDtfsCounter, 974 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:20,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 2060 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-25 23:32:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-25 23:32:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1396. [2022-11-25 23:32:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 886 states have (on average 1.3690744920993227) internal successors, (1213), 899 states have internal predecessors, (1213), 413 states have call successors, (413), 95 states have call predecessors, (413), 94 states have return successors, (409), 409 states have call predecessors, (409), 409 states have call successors, (409) [2022-11-25 23:32:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2035 transitions. [2022-11-25 23:32:20,467 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2035 transitions. Word has length 264 [2022-11-25 23:32:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:20,475 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 2035 transitions. [2022-11-25 23:32:20,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-25 23:32:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2035 transitions. [2022-11-25 23:32:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-25 23:32:20,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:20,488 INFO L195 NwaCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:32:20,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash -265736366, now seen corresponding path program 1 times [2022-11-25 23:32:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:20,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280356500] [2022-11-25 23:32:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-25 23:32:21,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:21,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280356500] [2022-11-25 23:32:21,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280356500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:21,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:21,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:32:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199639350] [2022-11-25 23:32:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:21,931 INFO L87 Difference]: Start difference. First operand 1396 states and 2035 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-11-25 23:32:24,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:24,772 INFO L93 Difference]: Finished difference Result 1472 states and 2110 transitions. [2022-11-25 23:32:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 308 [2022-11-25 23:32:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:24,785 INFO L225 Difference]: With dead ends: 1472 [2022-11-25 23:32:24,785 INFO L226 Difference]: Without dead ends: 1470 [2022-11-25 23:32:24,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:32:24,787 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 944 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:24,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 2907 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 505 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:32:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-11-25 23:32:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1470. [2022-11-25 23:32:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 925 states have (on average 1.3556756756756756) internal successors, (1254), 938 states have internal predecessors, (1254), 429 states have call successors, (429), 114 states have call predecessors, (429), 113 states have return successors, (425), 425 states have call predecessors, (425), 425 states have call successors, (425) [2022-11-25 23:32:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2108 transitions. [2022-11-25 23:32:24,899 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2108 transitions. Word has length 308 [2022-11-25 23:32:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:24,901 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 2108 transitions. [2022-11-25 23:32:24,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-11-25 23:32:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2108 transitions. [2022-11-25 23:32:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-25 23:32:24,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:24,911 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:32:24,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -844785177, now seen corresponding path program 1 times [2022-11-25 23:32:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:24,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746080978] [2022-11-25 23:32:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-25 23:32:25,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746080978] [2022-11-25 23:32:25,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746080978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:25,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:25,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015184042] [2022-11-25 23:32:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:25,317 INFO L87 Difference]: Start difference. First operand 1470 states and 2108 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-11-25 23:32:27,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:27,760 INFO L93 Difference]: Finished difference Result 3213 states and 4569 transitions. [2022-11-25 23:32:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 318 [2022-11-25 23:32:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:27,773 INFO L225 Difference]: With dead ends: 3213 [2022-11-25 23:32:27,773 INFO L226 Difference]: Without dead ends: 1792 [2022-11-25 23:32:27,779 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:27,780 INFO L413 NwaCegarLoop]: 1080 mSDtfsCounter, 709 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:27,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1988 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 23:32:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-25 23:32:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1770. [2022-11-25 23:32:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1118 states have (on average 1.338103756708408) internal successors, (1496), 1138 states have internal predecessors, (1496), 501 states have call successors, (501), 149 states have call predecessors, (501), 148 states have return successors, (497), 492 states have call predecessors, (497), 497 states have call successors, (497) [2022-11-25 23:32:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2494 transitions. [2022-11-25 23:32:27,911 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2494 transitions. Word has length 318 [2022-11-25 23:32:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 1770 states and 2494 transitions. [2022-11-25 23:32:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-11-25 23:32:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2494 transitions. [2022-11-25 23:32:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-25 23:32:27,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:27,925 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:32:27,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1990103890, now seen corresponding path program 1 times [2022-11-25 23:32:27,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:27,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326998495] [2022-11-25 23:32:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2022-11-25 23:32:28,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326998495] [2022-11-25 23:32:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326998495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:28,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258433958] [2022-11-25 23:32:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:28,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:28,251 INFO L87 Difference]: Start difference. First operand 1770 states and 2494 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-25 23:32:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:30,611 INFO L93 Difference]: Finished difference Result 4539 states and 6370 transitions. [2022-11-25 23:32:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 320 [2022-11-25 23:32:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:30,632 INFO L225 Difference]: With dead ends: 4539 [2022-11-25 23:32:30,632 INFO L226 Difference]: Without dead ends: 2818 [2022-11-25 23:32:30,640 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:30,641 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 907 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:30,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 2057 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 23:32:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2022-11-25 23:32:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2796. [2022-11-25 23:32:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 1789 states have (on average 1.3387367244270543) internal successors, (2395), 1822 states have internal predecessors, (2395), 754 states have call successors, (754), 251 states have call predecessors, (754), 250 states have return successors, (750), 735 states have call predecessors, (750), 750 states have call successors, (750) [2022-11-25 23:32:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3899 transitions. [2022-11-25 23:32:30,838 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3899 transitions. Word has length 320 [2022-11-25 23:32:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:30,838 INFO L495 AbstractCegarLoop]: Abstraction has 2796 states and 3899 transitions. [2022-11-25 23:32:30,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-25 23:32:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3899 transitions. [2022-11-25 23:32:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-25 23:32:30,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:30,878 INFO L195 NwaCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:32:30,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 300758607, now seen corresponding path program 1 times [2022-11-25 23:32:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659154456] [2022-11-25 23:32:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2449 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2447 trivial. 0 not checked. [2022-11-25 23:32:31,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659154456] [2022-11-25 23:32:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659154456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:31,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:31,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:32:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094100518] [2022-11-25 23:32:31,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:31,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:31,873 INFO L87 Difference]: Start difference. First operand 2796 states and 3899 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-25 23:32:35,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:35,383 INFO L93 Difference]: Finished difference Result 2882 states and 3993 transitions. [2022-11-25 23:32:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 314 [2022-11-25 23:32:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:35,404 INFO L225 Difference]: With dead ends: 2882 [2022-11-25 23:32:35,404 INFO L226 Difference]: Without dead ends: 2878 [2022-11-25 23:32:35,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:32:35,409 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 1017 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:35,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 2853 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 492 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 23:32:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2022-11-25 23:32:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2870. [2022-11-25 23:32:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 1831 states have (on average 1.334789732386674) internal successors, (2444), 1865 states have internal predecessors, (2444), 770 states have call successors, (770), 268 states have call predecessors, (770), 266 states have return successors, (766), 749 states have call predecessors, (766), 766 states have call successors, (766) [2022-11-25 23:32:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3980 transitions. [2022-11-25 23:32:35,652 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3980 transitions. Word has length 314 [2022-11-25 23:32:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:35,654 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3980 transitions. [2022-11-25 23:32:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-25 23:32:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3980 transitions. [2022-11-25 23:32:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-25 23:32:35,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:35,664 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:35,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:32:35,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1847578626, now seen corresponding path program 1 times [2022-11-25 23:32:35,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:35,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699375816] [2022-11-25 23:32:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:35,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2022-11-25 23:32:35,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699375816] [2022-11-25 23:32:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699375816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:35,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:35,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529996232] [2022-11-25 23:32:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:35,958 INFO L87 Difference]: Start difference. First operand 2870 states and 3980 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-25 23:32:38,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:39,053 INFO L93 Difference]: Finished difference Result 7572 states and 10510 transitions. [2022-11-25 23:32:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 322 [2022-11-25 23:32:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:39,081 INFO L225 Difference]: With dead ends: 7572 [2022-11-25 23:32:39,082 INFO L226 Difference]: Without dead ends: 4751 [2022-11-25 23:32:39,093 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:39,094 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 909 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:39,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 2116 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 23:32:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2022-11-25 23:32:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4727. [2022-11-25 23:32:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4727 states, 3053 states have (on average 1.3383557156894859) internal successors, (4086), 3118 states have internal predecessors, (4086), 1225 states have call successors, (1225), 448 states have call predecessors, (1225), 446 states have return successors, (1221), 1182 states have call predecessors, (1221), 1221 states have call successors, (1221) [2022-11-25 23:32:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 6532 transitions. [2022-11-25 23:32:39,540 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 6532 transitions. Word has length 322 [2022-11-25 23:32:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:39,541 INFO L495 AbstractCegarLoop]: Abstraction has 4727 states and 6532 transitions. [2022-11-25 23:32:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-25 23:32:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 6532 transitions. [2022-11-25 23:32:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-25 23:32:39,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:39,548 INFO L195 NwaCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:39,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:32:39,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash 575405075, now seen corresponding path program 1 times [2022-11-25 23:32:39,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:39,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632406931] [2022-11-25 23:32:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:39,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2022-11-25 23:32:40,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:40,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632406931] [2022-11-25 23:32:40,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632406931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:40,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:40,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:32:40,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726254224] [2022-11-25 23:32:40,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:40,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:40,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:40,377 INFO L87 Difference]: Start difference. First operand 4727 states and 6532 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-25 23:32:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:43,395 INFO L93 Difference]: Finished difference Result 4727 states and 6532 transitions. [2022-11-25 23:32:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 319 [2022-11-25 23:32:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:43,418 INFO L225 Difference]: With dead ends: 4727 [2022-11-25 23:32:43,419 INFO L226 Difference]: Without dead ends: 4637 [2022-11-25 23:32:43,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:32:43,422 INFO L413 NwaCegarLoop]: 934 mSDtfsCounter, 1014 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:43,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 2795 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:32:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-11-25 23:32:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4637. [2022-11-25 23:32:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 3028 states have (on average 1.333223249669749) internal successors, (4037), 3069 states have internal predecessors, (4037), 1171 states have call successors, (1171), 436 states have call predecessors, (1171), 436 states have return successors, (1171), 1153 states have call predecessors, (1171), 1171 states have call successors, (1171) [2022-11-25 23:32:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 6379 transitions. [2022-11-25 23:32:43,736 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 6379 transitions. Word has length 319 [2022-11-25 23:32:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:43,737 INFO L495 AbstractCegarLoop]: Abstraction has 4637 states and 6379 transitions. [2022-11-25 23:32:43,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-25 23:32:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 6379 transitions. [2022-11-25 23:32:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-25 23:32:43,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:43,754 INFO L195 NwaCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:43,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:32:43,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 550448072, now seen corresponding path program 1 times [2022-11-25 23:32:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596886696] [2022-11-25 23:32:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2022-11-25 23:32:44,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596886696] [2022-11-25 23:32:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596886696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:44,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:44,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934315520] [2022-11-25 23:32:44,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:44,050 INFO L87 Difference]: Start difference. First operand 4637 states and 6379 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-25 23:32:47,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:47,292 INFO L93 Difference]: Finished difference Result 10601 states and 14586 transitions. [2022-11-25 23:32:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:47,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 379 [2022-11-25 23:32:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:47,341 INFO L225 Difference]: With dead ends: 10601 [2022-11-25 23:32:47,341 INFO L226 Difference]: Without dead ends: 6220 [2022-11-25 23:32:47,420 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:47,422 INFO L413 NwaCegarLoop]: 1248 mSDtfsCounter, 688 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:47,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 2117 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 409 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 23:32:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2022-11-25 23:32:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 6214. [2022-11-25 23:32:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 4071 states have (on average 1.3301400147383935) internal successors, (5415), 4126 states have internal predecessors, (5415), 1549 states have call successors, (1549), 592 states have call predecessors, (1549), 592 states have return successors, (1549), 1523 states have call predecessors, (1549), 1549 states have call successors, (1549) [2022-11-25 23:32:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 8513 transitions. [2022-11-25 23:32:47,931 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 8513 transitions. Word has length 379 [2022-11-25 23:32:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:47,932 INFO L495 AbstractCegarLoop]: Abstraction has 6214 states and 8513 transitions. [2022-11-25 23:32:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-25 23:32:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 8513 transitions. [2022-11-25 23:32:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-25 23:32:47,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:47,941 INFO L195 NwaCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:32:47,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1515507469, now seen corresponding path program 1 times [2022-11-25 23:32:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401587693] [2022-11-25 23:32:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2022-11-25 23:32:48,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401587693] [2022-11-25 23:32:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401587693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:48,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481305940] [2022-11-25 23:32:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:48,189 INFO L87 Difference]: Start difference. First operand 6214 states and 8513 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2022-11-25 23:32:51,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:32:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:51,471 INFO L93 Difference]: Finished difference Result 14773 states and 20288 transitions. [2022-11-25 23:32:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 381 [2022-11-25 23:32:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:51,576 INFO L225 Difference]: With dead ends: 14773 [2022-11-25 23:32:51,576 INFO L226 Difference]: Without dead ends: 8815 [2022-11-25 23:32:51,593 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:51,594 INFO L413 NwaCegarLoop]: 1283 mSDtfsCounter, 885 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:51,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 2152 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 23:32:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8815 states. [2022-11-25 23:32:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8815 to 8807. [2022-11-25 23:32:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 5799 states have (on average 1.3317813416106226) internal successors, (7723), 5878 states have internal predecessors, (7723), 2167 states have call successors, (2167), 839 states have call predecessors, (2167), 839 states have return successors, (2171), 2127 states have call predecessors, (2171), 2167 states have call successors, (2171) [2022-11-25 23:32:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 12061 transitions. [2022-11-25 23:32:52,208 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 12061 transitions. Word has length 381 [2022-11-25 23:32:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:52,209 INFO L495 AbstractCegarLoop]: Abstraction has 8807 states and 12061 transitions. [2022-11-25 23:32:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2022-11-25 23:32:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 12061 transitions. [2022-11-25 23:32:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-25 23:32:52,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:52,217 INFO L195 NwaCegarLoop]: trace histogram [29, 24, 24, 24, 24, 24, 24, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:32:52,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash 209422691, now seen corresponding path program 1 times [2022-11-25 23:32:52,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:52,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314165795] [2022-11-25 23:32:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2022-11-25 23:32:52,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314165795] [2022-11-25 23:32:52,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314165795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:52,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:52,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940525907] [2022-11-25 23:32:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:52,459 INFO L87 Difference]: Start difference. First operand 8807 states and 12061 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-25 23:32:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:55,121 INFO L93 Difference]: Finished difference Result 21083 states and 28918 transitions. [2022-11-25 23:32:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 383 [2022-11-25 23:32:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:55,178 INFO L225 Difference]: With dead ends: 21083 [2022-11-25 23:32:55,178 INFO L226 Difference]: Without dead ends: 12532 [2022-11-25 23:32:55,206 INFO L412 NwaCegarLoop]: 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 [2022-11-25 23:32:55,207 INFO L413 NwaCegarLoop]: 1305 mSDtfsCounter, 888 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:55,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 2174 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:32:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12532 states. [2022-11-25 23:32:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12532 to 12526. [2022-11-25 23:32:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12526 states, 8286 states have (on average 1.3326092203717113) internal successors, (11042), 8402 states have internal predecessors, (11042), 3035 states have call successors, (3035), 1203 states have call predecessors, (3035), 1203 states have return successors, (3041), 2974 states have call predecessors, (3041), 3035 states have call successors, (3041) [2022-11-25 23:32:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12526 states to 12526 states and 17118 transitions. [2022-11-25 23:32:56,184 INFO L78 Accepts]: Start accepts. Automaton has 12526 states and 17118 transitions. Word has length 383 [2022-11-25 23:32:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:56,185 INFO L495 AbstractCegarLoop]: Abstraction has 12526 states and 17118 transitions. [2022-11-25 23:32:56,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-25 23:32:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12526 states and 17118 transitions. [2022-11-25 23:32:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-25 23:32:56,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:56,200 INFO L195 NwaCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:32:56,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:32:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1286059074, now seen corresponding path program 1 times [2022-11-25 23:32:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686915926] [2022-11-25 23:32:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:56,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2936 trivial. 0 not checked. [2022-11-25 23:32:57,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686915926] [2022-11-25 23:32:57,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686915926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:57,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:57,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:57,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255647385] [2022-11-25 23:32:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:57,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:32:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:32:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:57,106 INFO L87 Difference]: Start difference. First operand 12526 states and 17118 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-25 23:32:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:59,822 INFO L93 Difference]: Finished difference Result 30203 states and 42499 transitions. [2022-11-25 23:32:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:32:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 438 [2022-11-25 23:32:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:59,908 INFO L225 Difference]: With dead ends: 30203 [2022-11-25 23:32:59,908 INFO L226 Difference]: Without dead ends: 17933 [2022-11-25 23:32:59,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:59,950 INFO L413 NwaCegarLoop]: 1230 mSDtfsCounter, 1362 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:59,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 2230 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 23:32:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17933 states. [2022-11-25 23:33:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17933 to 12126. [2022-11-25 23:33:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12126 states, 8048 states have (on average 1.3312624254473162) internal successors, (10714), 8146 states have internal predecessors, (10714), 2899 states have call successors, (2899), 1177 states have call predecessors, (2899), 1177 states have return successors, (2902), 2838 states have call predecessors, (2902), 2899 states have call successors, (2902) [2022-11-25 23:33:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12126 states to 12126 states and 16515 transitions. [2022-11-25 23:33:00,925 INFO L78 Accepts]: Start accepts. Automaton has 12126 states and 16515 transitions. Word has length 438 [2022-11-25 23:33:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:00,926 INFO L495 AbstractCegarLoop]: Abstraction has 12126 states and 16515 transitions. [2022-11-25 23:33:00,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-25 23:33:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12126 states and 16515 transitions. [2022-11-25 23:33:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-25 23:33:00,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:00,940 INFO L195 NwaCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:00,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:33:00,941 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:33:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -75367567, now seen corresponding path program 1 times [2022-11-25 23:33:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322504473] [2022-11-25 23:33:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2022-11-25 23:33:01,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322504473] [2022-11-25 23:33:01,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322504473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:01,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837299945] [2022-11-25 23:33:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:01,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:01,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:01,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:01,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:33:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:33:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2022-11-25 23:33:02,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:02,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837299945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:02,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:02,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-25 23:33:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335468021] [2022-11-25 23:33:02,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:02,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:33:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:33:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:33:02,798 INFO L87 Difference]: Start difference. First operand 12126 states and 16515 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-25 23:33:07,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:10,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:10,793 INFO L93 Difference]: Finished difference Result 27745 states and 37753 transitions. [2022-11-25 23:33:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:33:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) Word has length 441 [2022-11-25 23:33:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:10,863 INFO L225 Difference]: With dead ends: 27745 [2022-11-25 23:33:10,864 INFO L226 Difference]: Without dead ends: 15875 [2022-11-25 23:33:10,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:33:10,897 INFO L413 NwaCegarLoop]: 1594 mSDtfsCounter, 867 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:10,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 2832 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 937 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 23:33:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15875 states. [2022-11-25 23:33:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15875 to 15869. [2022-11-25 23:33:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15869 states, 10545 states have (on average 1.3302987197724039) internal successors, (14028), 10670 states have internal predecessors, (14028), 3743 states have call successors, (3743), 1579 states have call predecessors, (3743), 1579 states have return successors, (3746), 3661 states have call predecessors, (3746), 3743 states have call successors, (3746) [2022-11-25 23:33:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15869 states to 15869 states and 21517 transitions. [2022-11-25 23:33:12,568 INFO L78 Accepts]: Start accepts. Automaton has 15869 states and 21517 transitions. Word has length 441 [2022-11-25 23:33:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:12,570 INFO L495 AbstractCegarLoop]: Abstraction has 15869 states and 21517 transitions. [2022-11-25 23:33:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (49), 3 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-25 23:33:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15869 states and 21517 transitions. [2022-11-25 23:33:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-25 23:33:12,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:12,598 INFO L195 NwaCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:12,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:12,817 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:33:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1028645780, now seen corresponding path program 1 times [2022-11-25 23:33:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986983349] [2022-11-25 23:33:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2022-11-25 23:33:13,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:13,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986983349] [2022-11-25 23:33:13,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986983349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:13,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:13,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:13,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189367893] [2022-11-25 23:33:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:13,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:33:13,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:13,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:33:13,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:33:13,294 INFO L87 Difference]: Start difference. First operand 15869 states and 21517 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-25 23:33:19,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:21,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:23,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:23,521 INFO L93 Difference]: Finished difference Result 36261 states and 49143 transitions. [2022-11-25 23:33:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:33:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 441 [2022-11-25 23:33:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:23,615 INFO L225 Difference]: With dead ends: 36261 [2022-11-25 23:33:23,615 INFO L226 Difference]: Without dead ends: 20648 [2022-11-25 23:33:23,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:33:23,658 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 864 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:23,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 3683 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1120 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2022-11-25 23:33:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20648 states. [2022-11-25 23:33:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20648 to 20642. [2022-11-25 23:33:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20642 states, 13745 states have (on average 1.3300836667879228) internal successors, (18282), 13908 states have internal predecessors, (18282), 4799 states have call successors, (4799), 2096 states have call predecessors, (4799), 2096 states have return successors, (4803), 4689 states have call predecessors, (4803), 4799 states have call successors, (4803) [2022-11-25 23:33:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20642 states to 20642 states and 27884 transitions. [2022-11-25 23:33:25,302 INFO L78 Accepts]: Start accepts. Automaton has 20642 states and 27884 transitions. Word has length 441 [2022-11-25 23:33:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:25,304 INFO L495 AbstractCegarLoop]: Abstraction has 20642 states and 27884 transitions. [2022-11-25 23:33:25,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 3 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2022-11-25 23:33:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20642 states and 27884 transitions. [2022-11-25 23:33:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-11-25 23:33:25,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:25,321 INFO L195 NwaCegarLoop]: trace histogram [32, 24, 24, 24, 24, 24, 24, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:33:25,321 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:33:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 348844311, now seen corresponding path program 1 times [2022-11-25 23:33:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416064135] [2022-11-25 23:33:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2960 trivial. 0 not checked. [2022-11-25 23:33:26,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416064135] [2022-11-25 23:33:26,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416064135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:26,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:26,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:26,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941643073] [2022-11-25 23:33:26,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:26,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:33:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:33:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:33:26,047 INFO L87 Difference]: Start difference. First operand 20642 states and 27884 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2022-11-25 23:33:31,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:33,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:33,483 INFO L93 Difference]: Finished difference Result 46379 states and 62608 transitions. [2022-11-25 23:33:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:33:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 445 [2022-11-25 23:33:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:33,597 INFO L225 Difference]: With dead ends: 46379 [2022-11-25 23:33:33,597 INFO L226 Difference]: Without dead ends: 25993 [2022-11-25 23:33:33,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:33:33,640 INFO L413 NwaCegarLoop]: 1456 mSDtfsCounter, 709 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:33,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 3451 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1051 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-25 23:33:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2022-11-25 23:33:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 25987. [2022-11-25 23:33:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25987 states, 17358 states have (on average 1.3281484041940315) internal successors, (23054), 17565 states have internal predecessors, (23054), 5948 states have call successors, (5948), 2679 states have call predecessors, (5948), 2679 states have return successors, (5952), 5806 states have call predecessors, (5952), 5948 states have call successors, (5952) [2022-11-25 23:33:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25987 states to 25987 states and 34954 transitions. [2022-11-25 23:33:35,783 INFO L78 Accepts]: Start accepts. Automaton has 25987 states and 34954 transitions. Word has length 445 [2022-11-25 23:33:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:35,785 INFO L495 AbstractCegarLoop]: Abstraction has 25987 states and 34954 transitions. [2022-11-25 23:33:35,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2022-11-25 23:33:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25987 states and 34954 transitions. [2022-11-25 23:33:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-25 23:33:35,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:35,829 INFO L195 NwaCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 23:33:35,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:33:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1473214309, now seen corresponding path program 1 times [2022-11-25 23:33:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:35,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639909898] [2022-11-25 23:33:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-25 23:33:36,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639909898] [2022-11-25 23:33:36,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639909898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812015337] [2022-11-25 23:33:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:36,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:33:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:33:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2022-11-25 23:33:37,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:37,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812015337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:37,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:37,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-25 23:33:37,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537216103] [2022-11-25 23:33:37,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:37,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:33:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:33:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:33:37,852 INFO L87 Difference]: Start difference. First operand 25987 states and 34954 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-25 23:33:41,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:44,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:46,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:46,528 INFO L93 Difference]: Finished difference Result 57803 states and 77774 transitions. [2022-11-25 23:33:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:33:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 476 [2022-11-25 23:33:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:46,637 INFO L225 Difference]: With dead ends: 57803 [2022-11-25 23:33:46,637 INFO L226 Difference]: Without dead ends: 32072 [2022-11-25 23:33:46,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:33:46,690 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 856 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2830 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 938 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 23:33:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2022-11-25 23:33:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 32066. [2022-11-25 23:33:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32066 states, 21471 states have (on average 1.3288621862046481) internal successors, (28532), 21722 states have internal predecessors, (28532), 7265 states have call successors, (7265), 3328 states have call predecessors, (7265), 3328 states have return successors, (7269), 7087 states have call predecessors, (7269), 7265 states have call successors, (7269) [2022-11-25 23:33:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32066 states to 32066 states and 43066 transitions. [2022-11-25 23:33:49,631 INFO L78 Accepts]: Start accepts. Automaton has 32066 states and 43066 transitions. Word has length 476 [2022-11-25 23:33:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:49,632 INFO L495 AbstractCegarLoop]: Abstraction has 32066 states and 43066 transitions. [2022-11-25 23:33:49,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-25 23:33:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 32066 states and 43066 transitions. [2022-11-25 23:33:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-25 23:33:49,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:49,660 INFO L195 NwaCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:49,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:33:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251efd44-0b9f-4c78-aad1-61a15a275b72/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:33:49,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:33:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 428263257, now seen corresponding path program 1 times [2022-11-25 23:33:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64716927] [2022-11-25 23:33:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-25 23:33:50,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64716927] [2022-11-25 23:33:50,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64716927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:50,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:50,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:33:50,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992227802] [2022-11-25 23:33:50,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:50,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:33:50,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:33:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:50,525 INFO L87 Difference]: Start difference. First operand 32066 states and 43066 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-25 23:33:54,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:57,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:33:58,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:58,328 INFO L93 Difference]: Finished difference Result 64060 states and 86054 transitions. [2022-11-25 23:33:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:33:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) Word has length 474 [2022-11-25 23:33:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:58,482 INFO L225 Difference]: With dead ends: 64060 [2022-11-25 23:33:58,482 INFO L226 Difference]: Without dead ends: 32250 [2022-11-25 23:33:58,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:58,549 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 2 mSDsluCounter, 2662 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:58,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3551 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 638 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 23:33:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32250 states. [2022-11-25 23:34:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32250 to 32186. [2022-11-25 23:34:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32186 states, 21571 states have (on average 1.3273376292244217) internal successors, (28632), 21822 states have internal predecessors, (28632), 7265 states have call successors, (7265), 3328 states have call predecessors, (7265), 3348 states have return successors, (7293), 7107 states have call predecessors, (7293), 7265 states have call successors, (7293) [2022-11-25 23:34:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32186 states to 32186 states and 43190 transitions. [2022-11-25 23:34:01,251 INFO L78 Accepts]: Start accepts. Automaton has 32186 states and 43190 transitions. Word has length 474 [2022-11-25 23:34:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:01,253 INFO L495 AbstractCegarLoop]: Abstraction has 32186 states and 43190 transitions. [2022-11-25 23:34:01,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-25 23:34:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32186 states and 43190 transitions. [2022-11-25 23:34:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-25 23:34:01,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:01,274 INFO L195 NwaCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 23:34:01,274 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:34:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1482045255, now seen corresponding path program 1 times [2022-11-25 23:34:01,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:01,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043705791] [2022-11-25 23:34:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3152 trivial. 0 not checked. [2022-11-25 23:34:01,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:01,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043705791] [2022-11-25 23:34:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043705791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:01,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:01,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:34:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20653294] [2022-11-25 23:34:01,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:01,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:34:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:34:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:34:01,957 INFO L87 Difference]: Start difference. First operand 32186 states and 43190 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2022-11-25 23:34:08,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:34:10,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:34:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:10,780 INFO L93 Difference]: Finished difference Result 70826 states and 95032 transitions. [2022-11-25 23:34:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:34:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 479 [2022-11-25 23:34:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:10,889 INFO L225 Difference]: With dead ends: 70826 [2022-11-25 23:34:10,889 INFO L226 Difference]: Without dead ends: 38896 [2022-11-25 23:34:10,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:34:10,959 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 700 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:10,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 3454 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-25 23:34:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38896 states. [2022-11-25 23:34:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38896 to 38890. [2022-11-25 23:34:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38890 states, 26136 states have (on average 1.3265993265993266) internal successors, (34672), 26440 states have internal predecessors, (34672), 8679 states have call successors, (8679), 4048 states have call predecessors, (8679), 4073 states have return successors, (8713), 8486 states have call predecessors, (8713), 8679 states have call successors, (8713) [2022-11-25 23:34:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38890 states to 38890 states and 52064 transitions. [2022-11-25 23:34:13,406 INFO L78 Accepts]: Start accepts. Automaton has 38890 states and 52064 transitions. Word has length 479 [2022-11-25 23:34:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:13,407 INFO L495 AbstractCegarLoop]: Abstraction has 38890 states and 52064 transitions. [2022-11-25 23:34:13,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2022-11-25 23:34:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 38890 states and 52064 transitions. [2022-11-25 23:34:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-11-25 23:34:13,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:13,432 INFO L195 NwaCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:13,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:34:13,433 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:34:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash -884360757, now seen corresponding path program 1 times [2022-11-25 23:34:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:13,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255013801] [2022-11-25 23:34:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:13,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-25 23:34:13,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255013801] [2022-11-25 23:34:13,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255013801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:13,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:13,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:34:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906178218] [2022-11-25 23:34:13,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:13,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:34:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:34:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:34:13,956 INFO L87 Difference]: Start difference. First operand 38890 states and 52064 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-25 23:34:18,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:34:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:19,233 INFO L93 Difference]: Finished difference Result 77779 states and 104142 transitions. [2022-11-25 23:34:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:34:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) Word has length 475 [2022-11-25 23:34:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:19,363 INFO L225 Difference]: With dead ends: 77779 [2022-11-25 23:34:19,363 INFO L226 Difference]: Without dead ends: 39145 [2022-11-25 23:34:19,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:34:19,439 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 4 mSDsluCounter, 2674 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3569 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:19,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3569 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:34:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39145 states. [2022-11-25 23:34:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39145 to 39015. [2022-11-25 23:34:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39015 states, 26236 states have (on average 1.327260253087361) internal successors, (34822), 26540 states have internal predecessors, (34822), 8679 states have call successors, (8679), 4048 states have call predecessors, (8679), 4098 states have return successors, (8743), 8511 states have call predecessors, (8743), 8679 states have call successors, (8743) [2022-11-25 23:34:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39015 states to 39015 states and 52244 transitions. [2022-11-25 23:34:22,144 INFO L78 Accepts]: Start accepts. Automaton has 39015 states and 52244 transitions. Word has length 475 [2022-11-25 23:34:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:22,145 INFO L495 AbstractCegarLoop]: Abstraction has 39015 states and 52244 transitions. [2022-11-25 23:34:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 3 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-25 23:34:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 39015 states and 52244 transitions. [2022-11-25 23:34:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-11-25 23:34:22,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:22,165 INFO L195 NwaCegarLoop]: trace histogram [34, 24, 24, 24, 24, 24, 24, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:22,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 23:34:22,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 23:34:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:22,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1159863914, now seen corresponding path program 1 times [2022-11-25 23:34:22,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309860072] [2022-11-25 23:34:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2022-11-25 23:34:22,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309860072] [2022-11-25 23:34:22,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309860072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:34:22,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:34:22,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:34:22,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900250626] [2022-11-25 23:34:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:34:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:34:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:34:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:34:22,684 INFO L87 Difference]: Start difference. First operand 39015 states and 52244 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2022-11-25 23:34:28,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []