./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/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_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 03:28:50,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:50,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:50,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:50,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:50,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:50,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:51,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:51,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:51,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:51,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:51,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:51,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:51,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:51,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:51,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:51,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:51,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:51,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:51,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:51,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:51,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:51,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:51,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:51,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:51,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:51,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:51,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:51,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:51,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:51,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:51,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:51,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:51,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:51,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:51,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:51,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:51,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:51,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:51,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:51,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:51,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:28:51,113 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:51,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:51,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:51,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:51,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:51,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:51,116 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:51,116 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:51,116 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:51,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:51,118 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:51,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:51,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:51,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:51,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:51,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:51,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:51,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:51,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:51,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:51,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:51,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:51,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:51,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:51,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:51,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:51,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:51,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:51,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:51,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:51,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:51,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:51,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:51,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:51,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:51,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:51,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:51,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:51,124 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_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2022-11-03 03:28:51,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:51,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:51,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:51,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:51,558 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:51,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-03 03:28:51,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/data/c699a83c7/67798f6ca36c4b6b9d85da4896993448/FLAGc03dd7b81 [2022-11-03 03:28:52,573 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:52,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-03 03:28:52,616 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/data/c699a83c7/67798f6ca36c4b6b9d85da4896993448/FLAGc03dd7b81 [2022-11-03 03:28:53,051 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/data/c699a83c7/67798f6ca36c4b6b9d85da4896993448 [2022-11-03 03:28:53,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:53,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:53,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:53,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:53,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:53,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:53" (1/1) ... [2022-11-03 03:28:53,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9980011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:53, skipping insertion in model container [2022-11-03 03:28:53,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:53" (1/1) ... [2022-11-03 03:28:53,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:53,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:55,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2022-11-03 03:28:55,230 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2022-11-03 03:28:55,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2022-11-03 03:28:55,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2022-11-03 03:28:55,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:55,320 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:55,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2022-11-03 03:28:55,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2022-11-03 03:28:55,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2022-11-03 03:28:55,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2022-11-03 03:28:55,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:55,782 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:55,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55 WrapperNode [2022-11-03 03:28:55,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:55,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:55,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:55,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:55,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:55,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,068 INFO L138 Inliner]: procedures = 238, calls = 999, calls flagged for inlining = 130, calls inlined = 118, statements flattened = 3013 [2022-11-03 03:28:56,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:56,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:56,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:56,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:56,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,250 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:56,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:56,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:56,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:56,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (1/1) ... [2022-11-03 03:28:56,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:56,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:56,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure dput [2022-11-03 03:28:56,433 INFO L138 BoogieDeclarations]: Found implementation of procedure dput [2022-11-03 03:28:56,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:28:56,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:28:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2022-11-03 03:28:56,434 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2022-11-03 03:28:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2022-11-03 03:28:56,434 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2022-11-03 03:28:56,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:28:56,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:28:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure dget [2022-11-03 03:28:56,435 INFO L138 BoogieDeclarations]: Found implementation of procedure dget [2022-11-03 03:28:56,435 INFO L130 BoogieDeclarations]: Found specification of procedure copy_strings_kernel [2022-11-03 03:28:56,435 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_strings_kernel [2022-11-03 03:28:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure simple_statfs [2022-11-03 03:28:56,436 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_statfs [2022-11-03 03:28:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:28:56,436 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:28:56,436 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 03:28:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 03:28:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:28:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure kill_node [2022-11-03 03:28:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_node [2022-11-03 03:28:56,437 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i_mutex_of_inode [2022-11-03 03:28:56,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i_mutex_of_inode [2022-11-03 03:28:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:28:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 03:28:56,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-03 03:28:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure allow_write_access [2022-11-03 03:28:56,438 INFO L138 BoogieDeclarations]: Found implementation of procedure allow_write_access [2022-11-03 03:28:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 03:28:56,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 03:28:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2022-11-03 03:28:56,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2022-11-03 03:28:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2022-11-03 03:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2022-11-03 03:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:28:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure bm_evict_inode [2022-11-03 03:28:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_evict_inode [2022-11-03 03:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure kill_litter_super [2022-11-03 03:28:56,441 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_litter_super [2022-11-03 03:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure simple_read_from_buffer [2022-11-03 03:28:56,441 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_read_from_buffer [2022-11-03 03:28:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-03 03:28:56,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-03 03:28:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 03:28:56,442 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 03:28:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-03 03:28:56,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-03 03:28:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure parse_command [2022-11-03 03:28:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_command [2022-11-03 03:28:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:28:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2022-11-03 03:28:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2022-11-03 03:28:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure bm_register_write [2022-11-03 03:28:56,444 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_register_write [2022-11-03 03:28:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_read [2022-11-03 03:28:56,444 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_read [2022-11-03 03:28:56,444 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 03:28:56,444 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 03:28:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-03 03:28:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-03 03:28:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_write [2022-11-03 03:28:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_write [2022-11-03 03:28:56,445 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:28:56,445 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:28:56,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2022-11-03 03:28:56,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2022-11-03 03:28:56,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:28:56,446 INFO L130 BoogieDeclarations]: Found specification of procedure scanarg [2022-11-03 03:28:56,446 INFO L138 BoogieDeclarations]: Found implementation of procedure scanarg [2022-11-03 03:28:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:28:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:28:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:28:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-03 03:28:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-03 03:28:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-11-03 03:28:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-03 03:28:56,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-03 03:28:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2022-11-03 03:28:56,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2022-11-03 03:28:56,448 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2022-11-03 03:28:56,449 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2022-11-03 03:28:56,449 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 03:28:56,449 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 03:28:56,449 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_write [2022-11-03 03:28:56,449 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_write [2022-11-03 03:28:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:28:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:28:56,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:28:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:28:56,450 INFO L130 BoogieDeclarations]: Found specification of procedure string_unescape_inplace [2022-11-03 03:28:56,450 INFO L138 BoogieDeclarations]: Found implementation of procedure string_unescape_inplace [2022-11-03 03:28:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure default_llseek [2022-11-03 03:28:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure default_llseek [2022-11-03 03:28:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-03 03:28:56,451 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-03 03:28:56,451 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_read [2022-11-03 03:28:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_read [2022-11-03 03:28:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-03 03:28:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-03 03:28:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 03:28:56,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 03:28:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:28:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 03:28:56,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 03:28:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:56,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i_mutex_of_inode [2022-11-03 03:28:56,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i_mutex_of_inode [2022-11-03 03:28:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 03:28:56,454 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 03:28:57,172 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:57,179 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:57,531 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:28:59,874 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-03 03:28:59,941 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:00,596 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:00,596 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:29:00,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:00 BoogieIcfgContainer [2022-11-03 03:29:00,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:00,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:00,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:00,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:00,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:53" (1/3) ... [2022-11-03 03:29:00,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1decaefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:00, skipping insertion in model container [2022-11-03 03:29:00,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:55" (2/3) ... [2022-11-03 03:29:00,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1decaefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:00, skipping insertion in model container [2022-11-03 03:29:00,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:00" (3/3) ... [2022-11-03 03:29:00,615 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2022-11-03 03:29:00,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:00,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-03 03:29:00,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:00,776 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;@4b7bb813, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:00,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-03 03:29:00,788 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) [2022-11-03 03:29:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-03 03:29:00,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:00,837 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] [2022-11-03 03:29:00,838 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)] === [2022-11-03 03:29:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1081247998, now seen corresponding path program 1 times [2022-11-03 03:29:00,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:00,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318419675] [2022-11-03 03:29:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2022-11-03 03:29:02,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318419675] [2022-11-03 03:29:02,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318419675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:02,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:02,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83772071] [2022-11-03 03:29:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:02,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:02,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:02,132 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) [2022-11-03 03:29:05,363 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 [] [2022-11-03 03:29:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:05,451 INFO L93 Difference]: Finished difference Result 2128 states and 3160 transitions. [2022-11-03 03:29:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:05,454 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 [2022-11-03 03:29:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:05,488 INFO L225 Difference]: With dead ends: 2128 [2022-11-03 03:29:05,488 INFO L226 Difference]: Without dead ends: 1400 [2022-11-03 03:29:05,504 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 [2022-11-03 03:29:05,507 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 973 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:05,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 2058 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 340 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 03:29:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-03 03:29:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1395. [2022-11-03 03:29:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 885 states have (on average 1.3694915254237288) internal successors, (1212), 899 states have internal predecessors, (1212), 413 states have call successors, (413), 95 states have call predecessors, (413), 94 states have return successors, (411), 408 states have call predecessors, (411), 409 states have call successors, (411) [2022-11-03 03:29:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2036 transitions. [2022-11-03 03:29:05,867 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2036 transitions. Word has length 264 [2022-11-03 03:29:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:05,877 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 2036 transitions. [2022-11-03 03:29:05,879 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) [2022-11-03 03:29:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2036 transitions. [2022-11-03 03:29:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-03 03:29:05,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:05,898 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] [2022-11-03 03:29:05,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:29:05,899 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)] === [2022-11-03 03:29:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash -592892162, now seen corresponding path program 1 times [2022-11-03 03:29:05,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:05,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104468176] [2022-11-03 03:29:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:05,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-03 03:29:07,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:07,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104468176] [2022-11-03 03:29:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104468176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:07,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:07,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711871086] [2022-11-03 03:29:07,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:07,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:07,209 INFO L87 Difference]: Start difference. First operand 1395 states and 2036 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) [2022-11-03 03:29:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:10,327 INFO L93 Difference]: Finished difference Result 1471 states and 2111 transitions. [2022-11-03 03:29:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:10,328 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 [2022-11-03 03:29:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:10,349 INFO L225 Difference]: With dead ends: 1471 [2022-11-03 03:29:10,350 INFO L226 Difference]: Without dead ends: 1469 [2022-11-03 03:29:10,358 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 [2022-11-03 03:29:10,360 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 944 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:10,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 2904 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 03:29:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-11-03 03:29:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1469. [2022-11-03 03:29:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 924 states have (on average 1.356060606060606) internal successors, (1253), 938 states have internal predecessors, (1253), 429 states have call successors, (429), 114 states have call predecessors, (429), 113 states have return successors, (427), 424 states have call predecessors, (427), 425 states have call successors, (427) [2022-11-03 03:29:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2109 transitions. [2022-11-03 03:29:10,511 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2109 transitions. Word has length 308 [2022-11-03 03:29:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:10,513 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 2109 transitions. [2022-11-03 03:29:10,513 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) [2022-11-03 03:29:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2109 transitions. [2022-11-03 03:29:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-03 03:29:10,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:10,525 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] [2022-11-03 03:29:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:29:10,525 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)] === [2022-11-03 03:29:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1192569740, now seen corresponding path program 1 times [2022-11-03 03:29:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027003172] [2022-11-03 03:29:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2022-11-03 03:29:10,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027003172] [2022-11-03 03:29:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027003172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:10,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:10,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397657121] [2022-11-03 03:29:10,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:10,933 INFO L87 Difference]: Start difference. First operand 1469 states and 2109 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) [2022-11-03 03:29:14,091 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 [] [2022-11-03 03:29:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:14,196 INFO L93 Difference]: Finished difference Result 3527 states and 5039 transitions. [2022-11-03 03:29:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:14,197 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 [2022-11-03 03:29:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:14,210 INFO L225 Difference]: With dead ends: 3527 [2022-11-03 03:29:14,211 INFO L226 Difference]: Without dead ends: 2107 [2022-11-03 03:29:14,218 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 [2022-11-03 03:29:14,219 INFO L413 NwaCegarLoop]: 1112 mSDtfsCounter, 906 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:14,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 2019 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 03:29:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-11-03 03:29:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2084. [2022-11-03 03:29:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1326 states have (on average 1.354449472096531) internal successors, (1796), 1350 states have internal predecessors, (1796), 583 states have call successors, (583), 173 states have call predecessors, (583), 172 states have return successors, (583), 572 states have call predecessors, (583), 579 states have call successors, (583) [2022-11-03 03:29:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2962 transitions. [2022-11-03 03:29:14,418 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2962 transitions. Word has length 320 [2022-11-03 03:29:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:14,419 INFO L495 AbstractCegarLoop]: Abstraction has 2084 states and 2962 transitions. [2022-11-03 03:29:14,420 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) [2022-11-03 03:29:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2962 transitions. [2022-11-03 03:29:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-03 03:29:14,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:14,431 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] [2022-11-03 03:29:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:29:14,432 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)] === [2022-11-03 03:29:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1102531120, now seen corresponding path program 1 times [2022-11-03 03:29:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072775308] [2022-11-03 03:29:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2022-11-03 03:29:14,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072775308] [2022-11-03 03:29:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072775308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:14,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:14,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184030587] [2022-11-03 03:29:14,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:14,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:14,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:14,860 INFO L87 Difference]: Start difference. First operand 2084 states and 2962 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) [2022-11-03 03:29:17,911 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 [] [2022-11-03 03:29:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:17,950 INFO L93 Difference]: Finished difference Result 4852 states and 6839 transitions. [2022-11-03 03:29:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:17,951 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 [2022-11-03 03:29:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:17,973 INFO L225 Difference]: With dead ends: 4852 [2022-11-03 03:29:17,973 INFO L226 Difference]: Without dead ends: 2817 [2022-11-03 03:29:17,983 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 [2022-11-03 03:29:17,985 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 709 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:17,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2039 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 03:29:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-03 03:29:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2795. [2022-11-03 03:29:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 1788 states have (on average 1.3389261744966443) internal successors, (2394), 1822 states have internal predecessors, (2394), 754 states have call successors, (754), 251 states have call predecessors, (754), 250 states have return successors, (752), 734 states have call predecessors, (752), 750 states have call successors, (752) [2022-11-03 03:29:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3900 transitions. [2022-11-03 03:29:18,247 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3900 transitions. Word has length 318 [2022-11-03 03:29:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:18,248 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 3900 transitions. [2022-11-03 03:29:18,248 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) [2022-11-03 03:29:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3900 transitions. [2022-11-03 03:29:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-03 03:29:18,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:18,258 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] [2022-11-03 03:29:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:29:18,259 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)] === [2022-11-03 03:29:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1553804870, now seen corresponding path program 1 times [2022-11-03 03:29:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:18,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223349377] [2022-11-03 03:29:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2449 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2447 trivial. 0 not checked. [2022-11-03 03:29:19,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223349377] [2022-11-03 03:29:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223349377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:19,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582186140] [2022-11-03 03:29:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:19,369 INFO L87 Difference]: Start difference. First operand 2795 states and 3900 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) [2022-11-03 03:29:22,541 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 [] [2022-11-03 03:29:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:22,611 INFO L93 Difference]: Finished difference Result 2842 states and 3950 transitions. [2022-11-03 03:29:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:22,612 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 [2022-11-03 03:29:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:22,632 INFO L225 Difference]: With dead ends: 2842 [2022-11-03 03:29:22,632 INFO L226 Difference]: Without dead ends: 2838 [2022-11-03 03:29:22,635 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 [2022-11-03 03:29:22,636 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 1017 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:22,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 2850 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 03:29:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-11-03 03:29:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2836. [2022-11-03 03:29:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 1812 states have (on average 1.336092715231788) internal successors, (2421), 1846 states have internal predecessors, (2421), 762 states have call successors, (762), 260 states have call predecessors, (762), 259 states have return successors, (762), 742 states have call predecessors, (762), 758 states have call successors, (762) [2022-11-03 03:29:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3945 transitions. [2022-11-03 03:29:22,906 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3945 transitions. Word has length 314 [2022-11-03 03:29:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:22,908 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3945 transitions. [2022-11-03 03:29:22,909 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) [2022-11-03 03:29:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3945 transitions. [2022-11-03 03:29:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-03 03:29:22,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:22,919 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] [2022-11-03 03:29:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:29:22,919 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)] === [2022-11-03 03:29:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -645054574, now seen corresponding path program 1 times [2022-11-03 03:29:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:22,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257591153] [2022-11-03 03:29:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2022-11-03 03:29:23,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:23,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257591153] [2022-11-03 03:29:23,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257591153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:23,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:23,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:23,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597896499] [2022-11-03 03:29:23,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:23,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:23,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:23,196 INFO L87 Difference]: Start difference. First operand 2836 states and 3945 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) [2022-11-03 03:29:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:25,270 INFO L93 Difference]: Finished difference Result 7470 states and 10405 transitions. [2022-11-03 03:29:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:25,271 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 [2022-11-03 03:29:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:25,305 INFO L225 Difference]: With dead ends: 7470 [2022-11-03 03:29:25,306 INFO L226 Difference]: Without dead ends: 4683 [2022-11-03 03:29:25,317 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 [2022-11-03 03:29:25,319 INFO L413 NwaCegarLoop]: 1205 mSDtfsCounter, 909 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:25,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 2112 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 03:29:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2022-11-03 03:29:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 4659. [2022-11-03 03:29:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 3015 states have (on average 1.3399668325041458) internal successors, (4040), 3080 states have internal predecessors, (4040), 1209 states have call successors, (1209), 432 states have call predecessors, (1209), 432 states have return successors, (1213), 1168 states have call predecessors, (1213), 1205 states have call successors, (1213) [2022-11-03 03:29:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6462 transitions. [2022-11-03 03:29:25,668 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6462 transitions. Word has length 322 [2022-11-03 03:29:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:25,669 INFO L495 AbstractCegarLoop]: Abstraction has 4659 states and 6462 transitions. [2022-11-03 03:29:25,670 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) [2022-11-03 03:29:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6462 transitions. [2022-11-03 03:29:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-03 03:29:25,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:25,677 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] [2022-11-03 03:29:25,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:29:25,678 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)] === [2022-11-03 03:29:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1340160412, now seen corresponding path program 1 times [2022-11-03 03:29:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:25,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272417152] [2022-11-03 03:29:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2022-11-03 03:29:26,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272417152] [2022-11-03 03:29:26,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272417152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:26,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:26,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:26,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830208465] [2022-11-03 03:29:26,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:26,757 INFO L87 Difference]: Start difference. First operand 4659 states and 6462 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) [2022-11-03 03:29:30,020 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 [] [2022-11-03 03:29:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,112 INFO L93 Difference]: Finished difference Result 4661 states and 6463 transitions. [2022-11-03 03:29:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:30,113 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 [2022-11-03 03:29:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,145 INFO L225 Difference]: With dead ends: 4661 [2022-11-03 03:29:30,145 INFO L226 Difference]: Without dead ends: 4571 [2022-11-03 03:29:30,150 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 [2022-11-03 03:29:30,151 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 1013 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 2847 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 490 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:29:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-11-03 03:29:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4569. [2022-11-03 03:29:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 2990 states have (on average 1.3347826086956522) internal successors, (3991), 3031 states have internal predecessors, (3991), 1155 states have call successors, (1155), 420 states have call predecessors, (1155), 422 states have return successors, (1163), 1139 states have call predecessors, (1163), 1155 states have call successors, (1163) [2022-11-03 03:29:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 6309 transitions. [2022-11-03 03:29:30,656 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 6309 transitions. Word has length 319 [2022-11-03 03:29:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,657 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 6309 transitions. [2022-11-03 03:29:30,658 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) [2022-11-03 03:29:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 6309 transitions. [2022-11-03 03:29:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-03 03:29:30,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,681 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] [2022-11-03 03:29:30,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:29:30,681 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)] === [2022-11-03 03:29:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1730028146, now seen corresponding path program 1 times [2022-11-03 03:29:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107008134] [2022-11-03 03:29:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2022-11-03 03:29:30,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:30,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107008134] [2022-11-03 03:29:30,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107008134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:30,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:30,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011325385] [2022-11-03 03:29:30,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:30,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:30,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:30,997 INFO L87 Difference]: Start difference. First operand 4569 states and 6309 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) [2022-11-03 03:29:34,459 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 [] [2022-11-03 03:29:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:34,616 INFO L93 Difference]: Finished difference Result 10819 states and 14972 transitions. [2022-11-03 03:29:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:34,617 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 [2022-11-03 03:29:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:34,667 INFO L225 Difference]: With dead ends: 10819 [2022-11-03 03:29:34,667 INFO L226 Difference]: Without dead ends: 6506 [2022-11-03 03:29:34,688 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 [2022-11-03 03:29:34,689 INFO L413 NwaCegarLoop]: 1280 mSDtfsCounter, 885 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:34,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 2148 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:29:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2022-11-03 03:29:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 6498. [2022-11-03 03:29:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 4267 states have (on average 1.3365362081087415) internal successors, (5703), 4327 states have internal predecessors, (5703), 1626 states have call successors, (1626), 601 states have call predecessors, (1626), 603 states have return successors, (1638), 1600 states have call predecessors, (1638), 1626 states have call successors, (1638) [2022-11-03 03:29:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 8967 transitions. [2022-11-03 03:29:35,328 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 8967 transitions. Word has length 381 [2022-11-03 03:29:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,330 INFO L495 AbstractCegarLoop]: Abstraction has 6498 states and 8967 transitions. [2022-11-03 03:29:35,330 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) [2022-11-03 03:29:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 8967 transitions. [2022-11-03 03:29:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-11-03 03:29:35,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,342 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] [2022-11-03 03:29:35,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:29:35,343 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)] === [2022-11-03 03:29:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1446105546, now seen corresponding path program 1 times [2022-11-03 03:29:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672883008] [2022-11-03 03:29:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2022-11-03 03:29:35,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672883008] [2022-11-03 03:29:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672883008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:35,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33844612] [2022-11-03 03:29:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:35,636 INFO L87 Difference]: Start difference. First operand 6498 states and 8967 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) [2022-11-03 03:29:39,133 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 [] [2022-11-03 03:29:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:39,206 INFO L93 Difference]: Finished difference Result 14987 states and 20670 transitions. [2022-11-03 03:29:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:39,207 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 [2022-11-03 03:29:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:39,257 INFO L225 Difference]: With dead ends: 14987 [2022-11-03 03:29:39,258 INFO L226 Difference]: Without dead ends: 8745 [2022-11-03 03:29:39,283 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 [2022-11-03 03:29:39,284 INFO L413 NwaCegarLoop]: 1266 mSDtfsCounter, 688 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:39,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 2134 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 418 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 03:29:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8745 states. [2022-11-03 03:29:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8745 to 8739. [2022-11-03 03:29:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8739 states, 5761 states have (on average 1.332581149106058) internal successors, (7677), 5840 states have internal predecessors, (7677), 2151 states have call successors, (2151), 823 states have call predecessors, (2151), 825 states have return successors, (2163), 2113 states have call predecessors, (2163), 2151 states have call successors, (2163) [2022-11-03 03:29:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8739 states to 8739 states and 11991 transitions. [2022-11-03 03:29:40,031 INFO L78 Accepts]: Start accepts. Automaton has 8739 states and 11991 transitions. Word has length 379 [2022-11-03 03:29:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:40,032 INFO L495 AbstractCegarLoop]: Abstraction has 8739 states and 11991 transitions. [2022-11-03 03:29:40,032 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) [2022-11-03 03:29:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 8739 states and 11991 transitions. [2022-11-03 03:29:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-03 03:29:40,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:40,043 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] [2022-11-03 03:29:40,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:29:40,043 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)] === [2022-11-03 03:29:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1746507220, now seen corresponding path program 1 times [2022-11-03 03:29:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:40,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800603644] [2022-11-03 03:29:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:40,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2022-11-03 03:29:40,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800603644] [2022-11-03 03:29:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800603644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:40,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:40,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:29:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271957513] [2022-11-03 03:29:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:40,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:40,350 INFO L87 Difference]: Start difference. First operand 8739 states and 11991 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) [2022-11-03 03:29:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:43,266 INFO L93 Difference]: Finished difference Result 20913 states and 28743 transitions. [2022-11-03 03:29:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:43,266 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 [2022-11-03 03:29:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:43,339 INFO L225 Difference]: With dead ends: 20913 [2022-11-03 03:29:43,340 INFO L226 Difference]: Without dead ends: 12430 [2022-11-03 03:29:43,467 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 [2022-11-03 03:29:43,468 INFO L413 NwaCegarLoop]: 1304 mSDtfsCounter, 888 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:43,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 2172 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:29:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12430 states. [2022-11-03 03:29:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12430 to 12424. [2022-11-03 03:29:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 8229 states have (on average 1.333454854781869) internal successors, (10973), 8345 states have internal predecessors, (10973), 3011 states have call successors, (3011), 1179 states have call predecessors, (3011), 1182 states have return successors, (3029), 2953 states have call predecessors, (3029), 3011 states have call successors, (3029) [2022-11-03 03:29:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 17013 transitions. [2022-11-03 03:29:44,550 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 17013 transitions. Word has length 383 [2022-11-03 03:29:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:44,552 INFO L495 AbstractCegarLoop]: Abstraction has 12424 states and 17013 transitions. [2022-11-03 03:29:44,552 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) [2022-11-03 03:29:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 17013 transitions. [2022-11-03 03:29:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-03 03:29:44,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:44,569 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] [2022-11-03 03:29:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:29:44,569 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)] === [2022-11-03 03:29:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1913308171, now seen corresponding path program 1 times [2022-11-03 03:29:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:44,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665800318] [2022-11-03 03:29:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2936 trivial. 0 not checked. [2022-11-03 03:29:45,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665800318] [2022-11-03 03:29:45,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665800318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:45,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:45,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:45,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872164927] [2022-11-03 03:29:45,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:45,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:45,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:45,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:45,777 INFO L87 Difference]: Start difference. First operand 12424 states and 17013 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) [2022-11-03 03:29:49,754 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 [] [2022-11-03 03:29:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:50,677 INFO L93 Difference]: Finished difference Result 29999 states and 42289 transitions. [2022-11-03 03:29:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:50,678 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 [2022-11-03 03:29:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:50,785 INFO L225 Difference]: With dead ends: 29999 [2022-11-03 03:29:50,785 INFO L226 Difference]: Without dead ends: 17831 [2022-11-03 03:29:50,837 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 [2022-11-03 03:29:50,838 INFO L413 NwaCegarLoop]: 1229 mSDtfsCounter, 1362 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:50,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 2228 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:29:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2022-11-03 03:29:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 12024. [2022-11-03 03:29:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12024 states, 7991 states have (on average 1.3321236390939808) internal successors, (10645), 8089 states have internal predecessors, (10645), 2875 states have call successors, (2875), 1153 states have call predecessors, (2875), 1156 states have return successors, (2884), 2817 states have call predecessors, (2884), 2875 states have call successors, (2884) [2022-11-03 03:29:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 16404 transitions. [2022-11-03 03:29:52,131 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 16404 transitions. Word has length 438 [2022-11-03 03:29:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:52,132 INFO L495 AbstractCegarLoop]: Abstraction has 12024 states and 16404 transitions. [2022-11-03 03:29:52,132 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) [2022-11-03 03:29:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 16404 transitions. [2022-11-03 03:29:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-03 03:29:52,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:52,148 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] [2022-11-03 03:29:52,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:29:52,149 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)] === [2022-11-03 03:29:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash 553286735, now seen corresponding path program 1 times [2022-11-03 03:29:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:52,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290530763] [2022-11-03 03:29:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2022-11-03 03:29:52,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290530763] [2022-11-03 03:29:52,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290530763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477703924] [2022-11-03 03:29:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:52,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:52,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:52,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2022-11-03 03:29:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477703924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:54,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:29:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996683923] [2022-11-03 03:29:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:54,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:54,337 INFO L87 Difference]: Start difference. First operand 12024 states and 16404 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) [2022-11-03 03:29:58,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:01,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:03,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:03,277 INFO L93 Difference]: Finished difference Result 27550 states and 37540 transitions. [2022-11-03 03:30:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:03,278 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 [2022-11-03 03:30:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:03,366 INFO L225 Difference]: With dead ends: 27550 [2022-11-03 03:30:03,366 INFO L226 Difference]: Without dead ends: 15782 [2022-11-03 03:30:03,406 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 [2022-11-03 03:30:03,406 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 870 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:03,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 2830 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 941 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-03 03:30:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15782 states. [2022-11-03 03:30:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15782 to 15767. [2022-11-03 03:30:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15767 states, 10488 states have (on average 1.330949656750572) internal successors, (13959), 10613 states have internal predecessors, (13959), 3719 states have call successors, (3719), 1555 states have call predecessors, (3719), 1558 states have return successors, (3728), 3640 states have call predecessors, (3728), 3719 states have call successors, (3728) [2022-11-03 03:30:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15767 states to 15767 states and 21406 transitions. [2022-11-03 03:30:05,353 INFO L78 Accepts]: Start accepts. Automaton has 15767 states and 21406 transitions. Word has length 441 [2022-11-03 03:30:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:05,354 INFO L495 AbstractCegarLoop]: Abstraction has 15767 states and 21406 transitions. [2022-11-03 03:30:05,355 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) [2022-11-03 03:30:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15767 states and 21406 transitions. [2022-11-03 03:30:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-11-03 03:30:05,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:05,372 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] [2022-11-03 03:30:05,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:30:05,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:30:05,587 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)] === [2022-11-03 03:30:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1136205252, now seen corresponding path program 1 times [2022-11-03 03:30:05,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:05,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957628225] [2022-11-03 03:30:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2960 trivial. 0 not checked. [2022-11-03 03:30:06,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:06,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957628225] [2022-11-03 03:30:06,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957628225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:06,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:06,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105095331] [2022-11-03 03:30:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:06,162 INFO L87 Difference]: Start difference. First operand 15767 states and 21406 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) [2022-11-03 03:30:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:10,142 INFO L93 Difference]: Finished difference Result 35484 states and 48115 transitions. [2022-11-03 03:30:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:10,142 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 [2022-11-03 03:30:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:10,233 INFO L225 Difference]: With dead ends: 35484 [2022-11-03 03:30:10,233 INFO L226 Difference]: Without dead ends: 19973 [2022-11-03 03:30:10,270 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 [2022-11-03 03:30:10,271 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 723 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:10,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 2596 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19973 states. [2022-11-03 03:30:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19973 to 19967. [2022-11-03 03:30:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19967 states, 13306 states have (on average 1.3281226514354427) internal successors, (17672), 13465 states have internal predecessors, (17672), 4643 states have call successors, (4643), 2013 states have call predecessors, (4643), 2016 states have return successors, (4652), 4540 states have call predecessors, (4652), 4643 states have call successors, (4652) [2022-11-03 03:30:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19967 states to 19967 states and 26967 transitions. [2022-11-03 03:30:12,036 INFO L78 Accepts]: Start accepts. Automaton has 19967 states and 26967 transitions. Word has length 445 [2022-11-03 03:30:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:12,038 INFO L495 AbstractCegarLoop]: Abstraction has 19967 states and 26967 transitions. [2022-11-03 03:30:12,038 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) [2022-11-03 03:30:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19967 states and 26967 transitions. [2022-11-03 03:30:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-03 03:30:12,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:12,061 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] [2022-11-03 03:30:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:30:12,062 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)] === [2022-11-03 03:30:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2105250112, now seen corresponding path program 1 times [2022-11-03 03:30:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663094519] [2022-11-03 03:30:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:12,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2022-11-03 03:30:12,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663094519] [2022-11-03 03:30:12,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663094519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:12,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:12,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303331154] [2022-11-03 03:30:12,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:12,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:12,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:12,687 INFO L87 Difference]: Start difference. First operand 19967 states and 26967 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) [2022-11-03 03:30:17,825 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 [] [2022-11-03 03:30:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:18,342 INFO L93 Difference]: Finished difference Result 45493 states and 61462 transitions. [2022-11-03 03:30:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:18,343 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 [2022-11-03 03:30:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:18,460 INFO L225 Difference]: With dead ends: 45493 [2022-11-03 03:30:18,461 INFO L226 Difference]: Without dead ends: 25782 [2022-11-03 03:30:18,514 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 [2022-11-03 03:30:18,514 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 877 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:18,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 2828 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 943 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 03:30:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25782 states. [2022-11-03 03:30:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25782 to 25774. [2022-11-03 03:30:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25774 states, 17238 states have (on average 1.3290404919364196) internal successors, (22910), 17445 states have internal predecessors, (22910), 5900 states have call successors, (5900), 2631 states have call predecessors, (5900), 2634 states have return successors, (5913), 5761 states have call predecessors, (5913), 5900 states have call successors, (5913) [2022-11-03 03:30:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25774 states to 25774 states and 34723 transitions. [2022-11-03 03:30:20,808 INFO L78 Accepts]: Start accepts. Automaton has 25774 states and 34723 transitions. Word has length 441 [2022-11-03 03:30:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:20,810 INFO L495 AbstractCegarLoop]: Abstraction has 25774 states and 34723 transitions. [2022-11-03 03:30:20,810 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) [2022-11-03 03:30:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25774 states and 34723 transitions. [2022-11-03 03:30:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-03 03:30:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:20,848 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] [2022-11-03 03:30:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:30:20,848 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)] === [2022-11-03 03:30:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 79342962, now seen corresponding path program 1 times [2022-11-03 03:30:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521949716] [2022-11-03 03:30:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-03 03:30:22,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521949716] [2022-11-03 03:30:22,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521949716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:22,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389059633] [2022-11-03 03:30:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:22,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:22,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:30:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2998 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:30:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2022-11-03 03:30:23,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:23,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389059633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:23,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:23,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:30:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662679178] [2022-11-03 03:30:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:23,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:23,188 INFO L87 Difference]: Start difference. First operand 25774 states and 34723 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) [2022-11-03 03:30:27,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:30,462 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 [] [2022-11-03 03:30:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:30,972 INFO L93 Difference]: Finished difference Result 57349 states and 77281 transitions. [2022-11-03 03:30:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:30,972 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 [2022-11-03 03:30:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:31,093 INFO L225 Difference]: With dead ends: 57349 [2022-11-03 03:30:31,094 INFO L226 Difference]: Without dead ends: 31831 [2022-11-03 03:30:31,158 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 [2022-11-03 03:30:31,159 INFO L413 NwaCegarLoop]: 1586 mSDtfsCounter, 848 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 3683 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:31,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 3683 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1124 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 03:30:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31831 states. [2022-11-03 03:30:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31831 to 31819. [2022-11-03 03:30:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31819 states, 21332 states have (on average 1.3296924807800488) internal successors, (28365), 21583 states have internal predecessors, (28365), 7209 states have call successors, (7209), 3272 states have call predecessors, (7209), 3276 states have return successors, (7224), 7035 states have call predecessors, (7224), 7209 states have call successors, (7224) [2022-11-03 03:30:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31819 states to 31819 states and 42798 transitions. [2022-11-03 03:30:34,005 INFO L78 Accepts]: Start accepts. Automaton has 31819 states and 42798 transitions. Word has length 476 [2022-11-03 03:30:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:34,006 INFO L495 AbstractCegarLoop]: Abstraction has 31819 states and 42798 transitions. [2022-11-03 03:30:34,007 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) [2022-11-03 03:30:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 31819 states and 42798 transitions. [2022-11-03 03:30:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-03 03:30:34,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:34,039 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] [2022-11-03 03:30:34,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe6d1e56-c4d4-4ea8-9ff9-4be300b8edb9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:34,255 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)] === [2022-11-03 03:30:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash 406854811, now seen corresponding path program 1 times [2022-11-03 03:30:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87419835] [2022-11-03 03:30:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-03 03:30:34,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87419835] [2022-11-03 03:30:34,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87419835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:34,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:34,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493106258] [2022-11-03 03:30:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:34,801 INFO L87 Difference]: Start difference. First operand 31819 states and 42798 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) [2022-11-03 03:30:39,602 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 [] [2022-11-03 03:30:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:40,491 INFO L93 Difference]: Finished difference Result 63566 states and 85518 transitions. [2022-11-03 03:30:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:40,520 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 [2022-11-03 03:30:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:40,666 INFO L225 Difference]: With dead ends: 63566 [2022-11-03 03:30:40,667 INFO L226 Difference]: Without dead ends: 32003 [2022-11-03 03:30:40,759 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 [2022-11-03 03:30:40,760 INFO L413 NwaCegarLoop]: 888 mSDtfsCounter, 2 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:40,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3547 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 640 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 03:30:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32003 states. [2022-11-03 03:30:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32003 to 31939. [2022-11-03 03:30:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31939 states, 21432 states have (on average 1.3281541620007467) internal successors, (28465), 21683 states have internal predecessors, (28465), 7209 states have call successors, (7209), 3272 states have call predecessors, (7209), 3296 states have return successors, (7248), 7055 states have call predecessors, (7248), 7209 states have call successors, (7248) [2022-11-03 03:30:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31939 states to 31939 states and 42922 transitions. [2022-11-03 03:30:43,224 INFO L78 Accepts]: Start accepts. Automaton has 31939 states and 42922 transitions. Word has length 474 [2022-11-03 03:30:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:43,226 INFO L495 AbstractCegarLoop]: Abstraction has 31939 states and 42922 transitions. [2022-11-03 03:30:43,227 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) [2022-11-03 03:30:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31939 states and 42922 transitions. [2022-11-03 03:30:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-03 03:30:43,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:43,255 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] [2022-11-03 03:30:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:30:43,255 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)] === [2022-11-03 03:30:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1367176333, now seen corresponding path program 1 times [2022-11-03 03:30:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:43,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576277240] [2022-11-03 03:30:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3152 trivial. 0 not checked. [2022-11-03 03:30:43,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576277240] [2022-11-03 03:30:43,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576277240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:43,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:43,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085206394] [2022-11-03 03:30:43,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:43,763 INFO L87 Difference]: Start difference. First operand 31939 states and 42922 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) [2022-11-03 03:30:49,862 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 [] [2022-11-03 03:30:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:50,455 INFO L93 Difference]: Finished difference Result 70332 states and 94496 transitions. [2022-11-03 03:30:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:50,455 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 [2022-11-03 03:30:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:50,606 INFO L225 Difference]: With dead ends: 70332 [2022-11-03 03:30:50,606 INFO L226 Difference]: Without dead ends: 38649 [2022-11-03 03:30:50,674 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 [2022-11-03 03:30:50,675 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 701 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:50,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 3449 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1056 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:30:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38649 states. [2022-11-03 03:30:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38649 to 38643. [2022-11-03 03:30:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38643 states, 25997 states have (on average 1.3272685309843444) internal successors, (34505), 26301 states have internal predecessors, (34505), 8623 states have call successors, (8623), 3992 states have call predecessors, (8623), 4021 states have return successors, (8668), 8434 states have call predecessors, (8668), 8623 states have call successors, (8668) [2022-11-03 03:30:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38643 states to 38643 states and 51796 transitions. [2022-11-03 03:30:53,665 INFO L78 Accepts]: Start accepts. Automaton has 38643 states and 51796 transitions. Word has length 479 [2022-11-03 03:30:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:53,666 INFO L495 AbstractCegarLoop]: Abstraction has 38643 states and 51796 transitions. [2022-11-03 03:30:53,666 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) [2022-11-03 03:30:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 38643 states and 51796 transitions. [2022-11-03 03:30:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-11-03 03:30:53,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:53,682 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] [2022-11-03 03:30:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 03:30:53,682 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)] === [2022-11-03 03:30:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash 676425627, now seen corresponding path program 1 times [2022-11-03 03:30:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586603129] [2022-11-03 03:30:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2022-11-03 03:30:54,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586603129] [2022-11-03 03:30:54,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586603129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:54,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:54,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:54,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868494982] [2022-11-03 03:30:54,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:54,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:54,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:54,334 INFO L87 Difference]: Start difference. First operand 38643 states and 51796 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) [2022-11-03 03:30:59,951 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 [] [2022-11-03 03:31:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:00,962 INFO L93 Difference]: Finished difference Result 77285 states and 103606 transitions. [2022-11-03 03:31:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:31:00,969 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 [2022-11-03 03:31:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:01,121 INFO L225 Difference]: With dead ends: 77285 [2022-11-03 03:31:01,121 INFO L226 Difference]: Without dead ends: 38898 [2022-11-03 03:31:01,227 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 [2022-11-03 03:31:01,228 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 4 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:01,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3565 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 644 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 03:31:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38898 states. [2022-11-03 03:31:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38898 to 38768. [2022-11-03 03:31:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38768 states, 26097 states have (on average 1.3279304134574856) internal successors, (34655), 26401 states have internal predecessors, (34655), 8623 states have call successors, (8623), 3992 states have call predecessors, (8623), 4046 states have return successors, (8698), 8459 states have call predecessors, (8698), 8623 states have call successors, (8698) [2022-11-03 03:31:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38768 states to 38768 states and 51976 transitions. [2022-11-03 03:31:04,094 INFO L78 Accepts]: Start accepts. Automaton has 38768 states and 51976 transitions. Word has length 475 [2022-11-03 03:31:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:04,095 INFO L495 AbstractCegarLoop]: Abstraction has 38768 states and 51976 transitions. [2022-11-03 03:31:04,096 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) [2022-11-03 03:31:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38768 states and 51976 transitions. [2022-11-03 03:31:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-11-03 03:31:04,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:04,126 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] [2022-11-03 03:31:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:31:04,126 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)] === [2022-11-03 03:31:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1797818268, now seen corresponding path program 1 times [2022-11-03 03:31:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644588442] [2022-11-03 03:31:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2022-11-03 03:31:04,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644588442] [2022-11-03 03:31:04,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644588442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:04,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:04,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:31:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065456308] [2022-11-03 03:31:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:31:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:31:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:31:04,700 INFO L87 Difference]: Start difference. First operand 38768 states and 51976 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)