./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:57:14,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:57:14,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:57:14,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:57:14,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:57:14,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:57:14,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:57:14,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:57:14,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:57:14,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:57:14,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:57:14,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:57:14,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:57:14,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:57:14,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:57:14,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:57:14,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:57:14,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:57:14,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:57:14,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:57:14,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:57:14,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:57:14,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:57:14,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:57:14,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:57:14,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:57:14,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:57:14,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:57:14,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:57:14,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:57:14,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:57:14,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:57:14,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:57:14,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:57:14,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:57:14,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:57:14,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:57:14,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:57:14,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:57:14,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:57:14,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:57:14,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 17:57:14,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:57:14,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:57:14,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:57:14,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:57:14,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:57:14,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:57:14,242 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:57:14,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:57:14,242 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:57:14,242 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:57:14,244 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:57:14,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:57:14,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:57:14,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:57:14,244 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:57:14,245 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:57:14,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:57:14,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:57:14,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:57:14,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:57:14,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:57:14,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:57:14,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:57:14,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:57:14,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:57:14,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:57:14,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:57:14,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:57:14,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:57:14,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:14,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:57:14,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:57:14,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:57:14,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:57:14,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:57:14,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:57:14,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:57:14,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:57:14,252 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2021-11-25 17:57:14,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:57:14,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:57:14,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:57:14,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:57:14,534 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:57:14,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-25 17:57:14,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/data/5c88989b4/25479850b38d49ec93466d31ce29d4c9/FLAG590373fd7 [2021-11-25 17:57:15,430 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:57:15,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-25 17:57:15,475 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/data/5c88989b4/25479850b38d49ec93466d31ce29d4c9/FLAG590373fd7 [2021-11-25 17:57:15,510 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/data/5c88989b4/25479850b38d49ec93466d31ce29d4c9 [2021-11-25 17:57:15,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:57:15,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:57:15,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:15,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:57:15,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:57:15,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:15" (1/1) ... [2021-11-25 17:57:15,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcfd7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:15, skipping insertion in model container [2021-11-25 17:57:15,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:15" (1/1) ... [2021-11-25 17:57:15,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:57:15,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:57:17,414 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-25 17:57:17,418 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-25 17:57:17,418 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-25 17:57:17,419 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-25 17:57:17,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:17,475 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:57:17,764 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-25 17:57:17,765 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-25 17:57:17,765 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-25 17:57:17,766 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_8aec59e4-44d2-4f46-84ce-9715acb5eda6/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-25 17:57:17,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:17,885 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:57:17,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17 WrapperNode [2021-11-25 17:57:17,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:17,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:57:17,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:57:17,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:57:17,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:17,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,076 INFO L137 Inliner]: procedures = 238, calls = 999, calls flagged for inlining = 130, calls inlined = 118, statements flattened = 3013 [2021-11-25 17:57:18,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:57:18,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:57:18,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:57:18,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:57:18,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:57:18,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:57:18,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:57:18,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:57:18,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (1/1) ... [2021-11-25 17:57:18,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:18,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:57:18,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:57:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure dput [2021-11-25 17:57:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure dput [2021-11-25 17:57:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 17:57:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 17:57:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2021-11-25 17:57:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2021-11-25 17:57:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-25 17:57:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-25 17:57:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 17:57:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 17:57:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure dget [2021-11-25 17:57:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure dget [2021-11-25 17:57:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure copy_strings_kernel [2021-11-25 17:57:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_strings_kernel [2021-11-25 17:57:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure simple_statfs [2021-11-25 17:57:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_statfs [2021-11-25 17:57:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 17:57:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 17:57:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-25 17:57:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-25 17:57:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:57:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure kill_node [2021-11-25 17:57:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_node [2021-11-25 17:57:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-25 17:57:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-25 17:57:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:57:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 17:57:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 17:57:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure allow_write_access [2021-11-25 17:57:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure allow_write_access [2021-11-25 17:57:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 17:57:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 17:57:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-25 17:57:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-25 17:57:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-25 17:57:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-25 17:57:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:57:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 17:57:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure bm_evict_inode [2021-11-25 17:57:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_evict_inode [2021-11-25 17:57:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure kill_litter_super [2021-11-25 17:57:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_litter_super [2021-11-25 17:57:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure simple_read_from_buffer [2021-11-25 17:57:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_read_from_buffer [2021-11-25 17:57:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 17:57:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 17:57:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 17:57:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 17:57:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 17:57:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 17:57:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure parse_command [2021-11-25 17:57:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_command [2021-11-25 17:57:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:57:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-25 17:57:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-25 17:57:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure bm_register_write [2021-11-25 17:57:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_register_write [2021-11-25 17:57:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_read [2021-11-25 17:57:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_read [2021-11-25 17:57:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 17:57:18,380 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 17:57:18,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 17:57:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 17:57:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_write [2021-11-25 17:57:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_write [2021-11-25 17:57:18,381 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 17:57:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 17:57:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-25 17:57:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-25 17:57:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:57:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure scanarg [2021-11-25 17:57:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure scanarg [2021-11-25 17:57:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 17:57:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 17:57:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:57:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 17:57:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 17:57:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-25 17:57:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 17:57:18,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 17:57:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 17:57:18,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 17:57:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-25 17:57:18,385 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-25 17:57:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 17:57:18,385 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 17:57:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_write [2021-11-25 17:57:18,386 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_write [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 17:57:18,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure string_unescape_inplace [2021-11-25 17:57:18,387 INFO L138 BoogieDeclarations]: Found implementation of procedure string_unescape_inplace [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure default_llseek [2021-11-25 17:57:18,387 INFO L138 BoogieDeclarations]: Found implementation of procedure default_llseek [2021-11-25 17:57:18,387 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-25 17:57:18,388 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-25 17:57:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_read [2021-11-25 17:57:18,388 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_read [2021-11-25 17:57:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 17:57:18,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 17:57:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 17:57:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 17:57:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:57:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 17:57:18,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 17:57:18,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:57:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:57:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-25 17:57:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-25 17:57:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 17:57:18,395 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 17:57:19,098 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:57:19,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:57:19,303 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 17:57:21,160 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 17:57:21,216 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:57:21,768 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:57:21,768 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:57:21,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:21 BoogieIcfgContainer [2021-11-25 17:57:21,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:57:21,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:57:21,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:57:21,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:57:21,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:57:15" (1/3) ... [2021-11-25 17:57:21,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395a9247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:21, skipping insertion in model container [2021-11-25 17:57:21,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:17" (2/3) ... [2021-11-25 17:57:21,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395a9247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:21, skipping insertion in model container [2021-11-25 17:57:21,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:21" (3/3) ... [2021-11-25 17:57:21,785 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-25 17:57:21,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:57:21,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 17:57:21,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:57:21,874 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:57:21,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 17:57:21,940 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) [2021-11-25 17:57:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-25 17:57:21,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:21,981 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-25 17:57:21,981 INFO L402 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)] === [2021-11-25 17:57:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -505855976, now seen corresponding path program 1 times [2021-11-25 17:57:21,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372807984] [2021-11-25 17:57:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:22,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2021-11-25 17:57:22,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372807984] [2021-11-25 17:57:22,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372807984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:22,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:22,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414704244] [2021-11-25 17:57:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:22,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:22,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:22,839 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 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-25 17:57:25,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:25,728 INFO L93 Difference]: Finished difference Result 2128 states and 3158 transitions. [2021-11-25 17:57:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 265 [2021-11-25 17:57:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:25,765 INFO L225 Difference]: With dead ends: 2128 [2021-11-25 17:57:25,766 INFO L226 Difference]: Without dead ends: 1400 [2021-11-25 17:57:25,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:25,780 INFO L933 BasicCegarLoop]: 1141 mSDtfsCounter, 973 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:25,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 2058 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 17:57:25,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-25 17:57:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1396. [2021-11-25 17:57:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 886 states have (on average 1.3690744920993227) internal successors, (1213), 899 states have internal predecessors, (1213), 413 states have call successors, (413), 95 states have call predecessors, (413), 94 states have return successors, (409), 409 states have call predecessors, (409), 409 states have call successors, (409) [2021-11-25 17:57:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2035 transitions. [2021-11-25 17:57:25,972 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2035 transitions. Word has length 265 [2021-11-25 17:57:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:25,974 INFO L470 AbstractCegarLoop]: Abstraction has 1396 states and 2035 transitions. [2021-11-25 17:57:25,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-25 17:57:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2035 transitions. [2021-11-25 17:57:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-25 17:57:25,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:25,987 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:25,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:57:25,987 INFO L402 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)] === [2021-11-25 17:57:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -592892162, now seen corresponding path program 1 times [2021-11-25 17:57:25,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:25,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109777589] [2021-11-25 17:57:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:25,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2021-11-25 17:57:26,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109777589] [2021-11-25 17:57:26,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109777589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:26,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:26,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:26,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630728292] [2021-11-25 17:57:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:26,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:26,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:26,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:26,358 INFO L87 Difference]: Start difference. First operand 1396 states and 2035 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 17:57:30,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:30,546 INFO L93 Difference]: Finished difference Result 1472 states and 2110 transitions. [2021-11-25 17:57:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:57:30,547 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 [2021-11-25 17:57:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:30,561 INFO L225 Difference]: With dead ends: 1472 [2021-11-25 17:57:30,561 INFO L226 Difference]: Without dead ends: 1470 [2021-11-25 17:57:30,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:57:30,564 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 944 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:30,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 2904 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 17:57:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-11-25 17:57:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1470. [2021-11-25 17:57:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 925 states have (on average 1.3556756756756756) internal successors, (1254), 938 states have internal predecessors, (1254), 429 states have call successors, (429), 114 states have call predecessors, (429), 113 states have return successors, (425), 425 states have call predecessors, (425), 425 states have call successors, (425) [2021-11-25 17:57:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2108 transitions. [2021-11-25 17:57:30,699 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2108 transitions. Word has length 308 [2021-11-25 17:57:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:30,701 INFO L470 AbstractCegarLoop]: Abstraction has 1470 states and 2108 transitions. [2021-11-25 17:57:30,701 INFO L471 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) [2021-11-25 17:57:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2108 transitions. [2021-11-25 17:57:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-25 17:57:30,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:30,713 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:30,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:57:30,714 INFO L402 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)] === [2021-11-25 17:57:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1192569740, now seen corresponding path program 1 times [2021-11-25 17:57:30,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067511982] [2021-11-25 17:57:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:30,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2021-11-25 17:57:31,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:31,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067511982] [2021-11-25 17:57:31,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067511982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:31,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:31,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:31,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251709294] [2021-11-25 17:57:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:31,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:31,034 INFO L87 Difference]: Start difference. First operand 1470 states and 2108 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) [2021-11-25 17:57:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:32,930 INFO L93 Difference]: Finished difference Result 3529 states and 5035 transitions. [2021-11-25 17:57:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:32,931 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 [2021-11-25 17:57:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:32,951 INFO L225 Difference]: With dead ends: 3529 [2021-11-25 17:57:32,951 INFO L226 Difference]: Without dead ends: 2108 [2021-11-25 17:57:32,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:32,960 INFO L933 BasicCegarLoop]: 1112 mSDtfsCounter, 907 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:32,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2019 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 17:57:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-25 17:57:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2086. [2021-11-25 17:57:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 1328 states have (on average 1.3539156626506024) internal successors, (1798), 1350 states have internal predecessors, (1798), 583 states have call successors, (583), 173 states have call predecessors, (583), 172 states have return successors, (579), 574 states have call predecessors, (579), 579 states have call successors, (579) [2021-11-25 17:57:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 2960 transitions. [2021-11-25 17:57:33,119 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 2960 transitions. Word has length 320 [2021-11-25 17:57:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:33,120 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 2960 transitions. [2021-11-25 17:57:33,120 INFO L471 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) [2021-11-25 17:57:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 2960 transitions. [2021-11-25 17:57:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-25 17:57:33,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:33,129 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:33,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:57:33,130 INFO L402 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)] === [2021-11-25 17:57:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1102531120, now seen corresponding path program 1 times [2021-11-25 17:57:33,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:33,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154126621] [2021-11-25 17:57:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:33,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2283 trivial. 0 not checked. [2021-11-25 17:57:33,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154126621] [2021-11-25 17:57:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154126621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:33,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:33,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:33,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906600371] [2021-11-25 17:57:33,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:33,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:33,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:33,345 INFO L87 Difference]: Start difference. First operand 2086 states and 2960 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) [2021-11-25 17:57:36,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:36,362 INFO L93 Difference]: Finished difference Result 4855 states and 6836 transitions. [2021-11-25 17:57:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:36,363 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 [2021-11-25 17:57:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:36,387 INFO L225 Difference]: With dead ends: 4855 [2021-11-25 17:57:36,387 INFO L226 Difference]: Without dead ends: 2818 [2021-11-25 17:57:36,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:36,398 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 709 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:36,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 2039 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 17:57:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-11-25 17:57:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2796. [2021-11-25 17:57:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 1789 states have (on average 1.3387367244270543) internal successors, (2395), 1822 states have internal predecessors, (2395), 754 states have call successors, (754), 251 states have call predecessors, (754), 250 states have return successors, (750), 735 states have call predecessors, (750), 750 states have call successors, (750) [2021-11-25 17:57:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3899 transitions. [2021-11-25 17:57:36,624 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3899 transitions. Word has length 318 [2021-11-25 17:57:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:36,625 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3899 transitions. [2021-11-25 17:57:36,625 INFO L471 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) [2021-11-25 17:57:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3899 transitions. [2021-11-25 17:57:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-25 17:57:36,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:36,635 INFO L514 BasicCegarLoop]: trace histogram [28, 24, 24, 24, 24, 24, 24, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:57:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:57:36,635 INFO L402 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)] === [2021-11-25 17:57:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 825480228, now seen corresponding path program 1 times [2021-11-25 17:57:36,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298697632] [2021-11-25 17:57:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:36,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2448 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2021-11-25 17:57:36,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298697632] [2021-11-25 17:57:36,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298697632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:36,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:36,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:36,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744408709] [2021-11-25 17:57:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:36,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:36,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:36,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:36,926 INFO L87 Difference]: Start difference. First operand 2796 states and 3899 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 17:57:41,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:41,322 INFO L93 Difference]: Finished difference Result 2802 states and 3904 transitions. [2021-11-25 17:57:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:57:41,323 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 313 [2021-11-25 17:57:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:41,344 INFO L225 Difference]: With dead ends: 2802 [2021-11-25 17:57:41,344 INFO L226 Difference]: Without dead ends: 2798 [2021-11-25 17:57:41,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:57:41,347 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 1018 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:41,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 2795 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 17:57:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-11-25 17:57:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2798. [2021-11-25 17:57:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 1791 states have (on average 1.3378001116694584) internal successors, (2396), 1823 states have internal predecessors, (2396), 754 states have call successors, (754), 252 states have call predecessors, (754), 250 states have return successors, (750), 735 states have call predecessors, (750), 750 states have call successors, (750) [2021-11-25 17:57:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3900 transitions. [2021-11-25 17:57:41,533 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3900 transitions. Word has length 313 [2021-11-25 17:57:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:41,534 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3900 transitions. [2021-11-25 17:57:41,535 INFO L471 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) [2021-11-25 17:57:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3900 transitions. [2021-11-25 17:57:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-25 17:57:41,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:41,542 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:41,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:57:41,543 INFO L402 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)] === [2021-11-25 17:57:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -645054574, now seen corresponding path program 1 times [2021-11-25 17:57:41,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:41,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649686240] [2021-11-25 17:57:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:41,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2021-11-25 17:57:41,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649686240] [2021-11-25 17:57:41,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649686240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:41,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:41,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:41,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989388896] [2021-11-25 17:57:41,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:41,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:41,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:41,757 INFO L87 Difference]: Start difference. First operand 2798 states and 3900 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) [2021-11-25 17:57:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:43,286 INFO L93 Difference]: Finished difference Result 7356 states and 10270 transitions. [2021-11-25 17:57:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:43,287 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 [2021-11-25 17:57:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:43,323 INFO L225 Difference]: With dead ends: 7356 [2021-11-25 17:57:43,324 INFO L226 Difference]: Without dead ends: 4607 [2021-11-25 17:57:43,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:43,336 INFO L933 BasicCegarLoop]: 1209 mSDtfsCounter, 909 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:43,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 2116 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 17:57:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2021-11-25 17:57:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4583. [2021-11-25 17:57:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 2973 states have (on average 1.3420787083753785) internal successors, (3990), 3034 states have internal predecessors, (3990), 1193 states have call successors, (1193), 416 states have call predecessors, (1193), 414 states have return successors, (1189), 1154 states have call predecessors, (1189), 1189 states have call successors, (1189) [2021-11-25 17:57:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6372 transitions. [2021-11-25 17:57:43,658 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6372 transitions. Word has length 322 [2021-11-25 17:57:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:43,659 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 6372 transitions. [2021-11-25 17:57:43,660 INFO L471 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) [2021-11-25 17:57:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6372 transitions. [2021-11-25 17:57:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-25 17:57:43,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:43,665 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:57:43,665 INFO L402 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)] === [2021-11-25 17:57:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1340160412, now seen corresponding path program 1 times [2021-11-25 17:57:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538563042] [2021-11-25 17:57:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:43,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2021-11-25 17:57:43,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538563042] [2021-11-25 17:57:43,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538563042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:43,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:43,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:57:43,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306019706] [2021-11-25 17:57:43,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:43,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:57:43,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:57:43,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:57:43,973 INFO L87 Difference]: Start difference. First operand 4583 states and 6372 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) [2021-11-25 17:57:46,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:47,476 INFO L93 Difference]: Finished difference Result 4583 states and 6372 transitions. [2021-11-25 17:57:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:57:47,477 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 [2021-11-25 17:57:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:47,509 INFO L225 Difference]: With dead ends: 4583 [2021-11-25 17:57:47,510 INFO L226 Difference]: Without dead ends: 4493 [2021-11-25 17:57:47,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:57:47,517 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 1014 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:47,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 2792 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 17:57:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2021-11-25 17:57:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4493. [2021-11-25 17:57:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 2948 states have (on average 1.3368385345997287) internal successors, (3941), 2985 states have internal predecessors, (3941), 1139 states have call successors, (1139), 404 states have call predecessors, (1139), 404 states have return successors, (1139), 1125 states have call predecessors, (1139), 1139 states have call successors, (1139) [2021-11-25 17:57:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 6219 transitions. [2021-11-25 17:57:47,798 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 6219 transitions. Word has length 319 [2021-11-25 17:57:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 4493 states and 6219 transitions. [2021-11-25 17:57:47,799 INFO L471 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) [2021-11-25 17:57:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 6219 transitions. [2021-11-25 17:57:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-25 17:57:47,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:47,814 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:47,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:57:47,814 INFO L402 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)] === [2021-11-25 17:57:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1446105546, now seen corresponding path program 1 times [2021-11-25 17:57:47,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730220100] [2021-11-25 17:57:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:47,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2021-11-25 17:57:48,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730220100] [2021-11-25 17:57:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730220100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:48,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:48,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:48,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180827600] [2021-11-25 17:57:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:48,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:48,014 INFO L87 Difference]: Start difference. First operand 4493 states and 6219 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) [2021-11-25 17:57:51,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:51,113 INFO L93 Difference]: Finished difference Result 10313 states and 14266 transitions. [2021-11-25 17:57:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:51,114 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 [2021-11-25 17:57:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:51,156 INFO L225 Difference]: With dead ends: 10313 [2021-11-25 17:57:51,156 INFO L226 Difference]: Without dead ends: 6076 [2021-11-25 17:57:51,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:51,174 INFO L933 BasicCegarLoop]: 1247 mSDtfsCounter, 688 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:51,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 2115 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 17:57:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6076 states. [2021-11-25 17:57:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6076 to 6070. [2021-11-25 17:57:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 3991 states have (on average 1.3327486845402154) internal successors, (5319), 4042 states have internal predecessors, (5319), 1517 states have call successors, (1517), 560 states have call predecessors, (1517), 560 states have return successors, (1517), 1495 states have call predecessors, (1517), 1517 states have call successors, (1517) [2021-11-25 17:57:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 8353 transitions. [2021-11-25 17:57:51,555 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 8353 transitions. Word has length 379 [2021-11-25 17:57:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:51,556 INFO L470 AbstractCegarLoop]: Abstraction has 6070 states and 8353 transitions. [2021-11-25 17:57:51,556 INFO L471 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) [2021-11-25 17:57:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 8353 transitions. [2021-11-25 17:57:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-25 17:57:51,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:51,567 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:51,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:57:51,567 INFO L402 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)] === [2021-11-25 17:57:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1730028146, now seen corresponding path program 1 times [2021-11-25 17:57:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345407188] [2021-11-25 17:57:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:51,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2021-11-25 17:57:51,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:51,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345407188] [2021-11-25 17:57:51,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345407188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:51,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:51,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:51,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390001123] [2021-11-25 17:57:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:51,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:51,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:51,757 INFO L87 Difference]: Start difference. First operand 6070 states and 8353 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) [2021-11-25 17:57:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:53,475 INFO L93 Difference]: Finished difference Result 14485 states and 19964 transitions. [2021-11-25 17:57:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:53,476 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 [2021-11-25 17:57:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:53,520 INFO L225 Difference]: With dead ends: 14485 [2021-11-25 17:57:53,521 INFO L226 Difference]: Without dead ends: 8671 [2021-11-25 17:57:53,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:53,541 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 886 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:53,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 2148 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 17:57:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8671 states. [2021-11-25 17:57:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8671 to 8665. [2021-11-25 17:57:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8665 states, 5721 states have (on average 1.3335081279496592) internal successors, (7629), 5794 states have internal predecessors, (7629), 2135 states have call successors, (2135), 807 states have call predecessors, (2135), 807 states have return successors, (2135), 2101 states have call predecessors, (2135), 2135 states have call successors, (2135) [2021-11-25 17:57:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8665 states to 8665 states and 11899 transitions. [2021-11-25 17:57:53,972 INFO L78 Accepts]: Start accepts. Automaton has 8665 states and 11899 transitions. Word has length 381 [2021-11-25 17:57:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:53,973 INFO L470 AbstractCegarLoop]: Abstraction has 8665 states and 11899 transitions. [2021-11-25 17:57:53,974 INFO L471 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) [2021-11-25 17:57:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8665 states and 11899 transitions. [2021-11-25 17:57:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-25 17:57:53,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:53,983 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:53,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:57:53,983 INFO L402 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)] === [2021-11-25 17:57:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1746507220, now seen corresponding path program 1 times [2021-11-25 17:57:53,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058616229] [2021-11-25 17:57:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:53,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2594 trivial. 0 not checked. [2021-11-25 17:57:54,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:54,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058616229] [2021-11-25 17:57:54,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058616229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:54,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:54,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:57:54,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949725840] [2021-11-25 17:57:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:54,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:54,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:54,223 INFO L87 Difference]: Start difference. First operand 8665 states and 11899 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) [2021-11-25 17:57:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:55,628 INFO L93 Difference]: Finished difference Result 20728 states and 28513 transitions. [2021-11-25 17:57:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:57:55,628 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 [2021-11-25 17:57:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:55,747 INFO L225 Difference]: With dead ends: 20728 [2021-11-25 17:57:55,747 INFO L226 Difference]: Without dead ends: 12319 [2021-11-25 17:57:55,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:55,772 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 888 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:55,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 2172 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 17:57:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-11-25 17:57:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 12313. [2021-11-25 17:57:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 8169 states have (on average 1.334435059370792) internal successors, (10901), 8276 states have internal predecessors, (10901), 2987 states have call successors, (2987), 1155 states have call predecessors, (2987), 1155 states have return successors, (2987), 2935 states have call predecessors, (2987), 2987 states have call successors, (2987) [2021-11-25 17:57:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 16875 transitions. [2021-11-25 17:57:56,420 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 16875 transitions. Word has length 383 [2021-11-25 17:57:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:56,421 INFO L470 AbstractCegarLoop]: Abstraction has 12313 states and 16875 transitions. [2021-11-25 17:57:56,421 INFO L471 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) [2021-11-25 17:57:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 16875 transitions. [2021-11-25 17:57:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-25 17:57:56,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:56,438 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:57:56,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:57:56,438 INFO L402 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)] === [2021-11-25 17:57:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1913308171, now seen corresponding path program 1 times [2021-11-25 17:57:56,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:56,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874899785] [2021-11-25 17:57:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:56,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2936 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2936 trivial. 0 not checked. [2021-11-25 17:57:56,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:56,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874899785] [2021-11-25 17:57:56,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874899785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:56,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:56,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:57:56,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428108539] [2021-11-25 17:57:56,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:56,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:57:56,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:57:56,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:57:56,809 INFO L87 Difference]: Start difference. First operand 12313 states and 16875 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) [2021-11-25 17:57:59,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:01,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:01,785 INFO L93 Difference]: Finished difference Result 29777 states and 42013 transitions. [2021-11-25 17:58:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:01,785 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 [2021-11-25 17:58:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:01,934 INFO L225 Difference]: With dead ends: 29777 [2021-11-25 17:58:01,934 INFO L226 Difference]: Without dead ends: 17720 [2021-11-25 17:58:01,966 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:01,967 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 1362 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:01,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2228 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 510 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 17:58:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2021-11-25 17:58:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 11913. [2021-11-25 17:58:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 7931 states have (on average 1.3331231874921194) internal successors, (10573), 8020 states have internal predecessors, (10573), 2851 states have call successors, (2851), 1129 states have call predecessors, (2851), 1129 states have return successors, (2851), 2799 states have call predecessors, (2851), 2851 states have call successors, (2851) [2021-11-25 17:58:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 16275 transitions. [2021-11-25 17:58:02,716 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 16275 transitions. Word has length 438 [2021-11-25 17:58:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:02,717 INFO L470 AbstractCegarLoop]: Abstraction has 11913 states and 16275 transitions. [2021-11-25 17:58:02,717 INFO L471 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) [2021-11-25 17:58:02,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 16275 transitions. [2021-11-25 17:58:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-25 17:58:02,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:02,733 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:02,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:58:02,734 INFO L402 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)] === [2021-11-25 17:58:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 553286735, now seen corresponding path program 1 times [2021-11-25 17:58:02,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:02,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690948595] [2021-11-25 17:58:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:02,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2021-11-25 17:58:02,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690948595] [2021-11-25 17:58:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690948595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:58:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053467991] [2021-11-25 17:58:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:02,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:58:02,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:58:02,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:58:02,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:58:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:58:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2021-11-25 17:58:04,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:04,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053467991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:04,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:58:04,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 17:58:04,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979120629] [2021-11-25 17:58:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:04,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:04,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:04,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:04,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:04,569 INFO L87 Difference]: Start difference. First operand 11913 states and 16275 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) [2021-11-25 17:58:07,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:09,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:09,646 INFO L93 Difference]: Finished difference Result 27211 states and 37153 transitions. [2021-11-25 17:58:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:09,647 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 [2021-11-25 17:58:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:09,714 INFO L225 Difference]: With dead ends: 27211 [2021-11-25 17:58:09,715 INFO L226 Difference]: Without dead ends: 15554 [2021-11-25 17:58:09,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:09,744 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 870 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 2830 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:09,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 2830 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 17:58:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15554 states. [2021-11-25 17:58:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15554 to 15548. [2021-11-25 17:58:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15548 states, 10368 states have (on average 1.3324652777777777) internal successors, (13815), 10481 states have internal predecessors, (13815), 3671 states have call successors, (3671), 1507 states have call predecessors, (3671), 1507 states have return successors, (3671), 3601 states have call predecessors, (3671), 3671 states have call successors, (3671) [2021-11-25 17:58:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15548 states to 15548 states and 21157 transitions. [2021-11-25 17:58:10,613 INFO L78 Accepts]: Start accepts. Automaton has 15548 states and 21157 transitions. Word has length 441 [2021-11-25 17:58:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 15548 states and 21157 transitions. [2021-11-25 17:58:10,615 INFO L471 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) [2021-11-25 17:58:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 15548 states and 21157 transitions. [2021-11-25 17:58:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-25 17:58:10,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:10,634 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:10,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:10,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 17:58:10,847 INFO L402 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)] === [2021-11-25 17:58:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1136205252, now seen corresponding path program 1 times [2021-11-25 17:58:10,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:10,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678690828] [2021-11-25 17:58:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:10,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2980 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2960 trivial. 0 not checked. [2021-11-25 17:58:11,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678690828] [2021-11-25 17:58:11,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678690828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:11,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:11,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:11,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137507834] [2021-11-25 17:58:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:11,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:11,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:11,081 INFO L87 Difference]: Start difference. First operand 15548 states and 21157 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) [2021-11-25 17:58:14,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:15,001 INFO L93 Difference]: Finished difference Result 35046 states and 47617 transitions. [2021-11-25 17:58:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:15,002 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 [2021-11-25 17:58:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:15,067 INFO L225 Difference]: With dead ends: 35046 [2021-11-25 17:58:15,067 INFO L226 Difference]: Without dead ends: 19754 [2021-11-25 17:58:15,095 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:15,096 INFO L933 BasicCegarLoop]: 1454 mSDtfsCounter, 712 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:15,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 3446 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 17:58:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19754 states. [2021-11-25 17:58:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19754 to 19748. [2021-11-25 17:58:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19748 states, 13186 states have (on average 1.3292886394661003) internal successors, (17528), 13333 states have internal predecessors, (17528), 4595 states have call successors, (4595), 1965 states have call predecessors, (4595), 1965 states have return successors, (4595), 4501 states have call predecessors, (4595), 4595 states have call successors, (4595) [2021-11-25 17:58:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19748 states to 19748 states and 26718 transitions. [2021-11-25 17:58:16,325 INFO L78 Accepts]: Start accepts. Automaton has 19748 states and 26718 transitions. Word has length 445 [2021-11-25 17:58:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 19748 states and 26718 transitions. [2021-11-25 17:58:16,327 INFO L471 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) [2021-11-25 17:58:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 19748 states and 26718 transitions. [2021-11-25 17:58:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-25 17:58:16,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:16,348 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:16,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:58:16,348 INFO L402 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)] === [2021-11-25 17:58:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2105250112, now seen corresponding path program 1 times [2021-11-25 17:58:16,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:16,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905306522] [2021-11-25 17:58:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:16,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2021-11-25 17:58:16,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:16,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905306522] [2021-11-25 17:58:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905306522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:16,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:16,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745479627] [2021-11-25 17:58:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:16,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:16,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:16,853 INFO L87 Difference]: Start difference. First operand 19748 states and 26718 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) [2021-11-25 17:58:21,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:23,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:25,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:25,960 INFO L93 Difference]: Finished difference Result 45057 states and 60966 transitions. [2021-11-25 17:58:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:25,961 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 [2021-11-25 17:58:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:26,048 INFO L225 Difference]: With dead ends: 45057 [2021-11-25 17:58:26,048 INFO L226 Difference]: Without dead ends: 25565 [2021-11-25 17:58:26,085 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:26,086 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 866 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 3678 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:26,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 3678 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1125 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2021-11-25 17:58:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25565 states. [2021-11-25 17:58:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25565 to 25555. [2021-11-25 17:58:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25555 states, 17118 states have (on average 1.3299450870428788) internal successors, (22766), 17313 states have internal predecessors, (22766), 5852 states have call successors, (5852), 2583 states have call predecessors, (5852), 2583 states have return successors, (5856), 5722 states have call predecessors, (5856), 5852 states have call successors, (5856) [2021-11-25 17:58:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25555 states to 25555 states and 34474 transitions. [2021-11-25 17:58:27,564 INFO L78 Accepts]: Start accepts. Automaton has 25555 states and 34474 transitions. Word has length 441 [2021-11-25 17:58:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 25555 states and 34474 transitions. [2021-11-25 17:58:27,565 INFO L471 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) [2021-11-25 17:58:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 25555 states and 34474 transitions. [2021-11-25 17:58:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-25 17:58:27,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:27,596 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:27,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:58:27,597 INFO L402 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)] === [2021-11-25 17:58:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash 79342962, now seen corresponding path program 1 times [2021-11-25 17:58:27,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450136597] [2021-11-25 17:58:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:27,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-25 17:58:27,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450136597] [2021-11-25 17:58:27,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450136597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:58:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744345365] [2021-11-25 17:58:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:27,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:58:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:58:27,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:58:27,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:58:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2998 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:58:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3181 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2021-11-25 17:58:29,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:29,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744345365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:29,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:58:29,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 17:58:29,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340310700] [2021-11-25 17:58:29,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:29,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:29,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:29,469 INFO L87 Difference]: Start difference. First operand 25555 states and 34474 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) [2021-11-25 17:58:33,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:34,028 INFO L93 Difference]: Finished difference Result 56794 states and 76654 transitions. [2021-11-25 17:58:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:34,044 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 [2021-11-25 17:58:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:34,150 INFO L225 Difference]: With dead ends: 56794 [2021-11-25 17:58:34,150 INFO L226 Difference]: Without dead ends: 31495 [2021-11-25 17:58:34,198 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:34,199 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 857 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:34,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 2828 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 17:58:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31495 states. [2021-11-25 17:58:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31495 to 31489. [2021-11-25 17:58:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31489 states, 21150 states have (on average 1.3308274231678487) internal successors, (28147), 21386 states have internal predecessors, (28147), 7137 states have call successors, (7137), 3200 states have call predecessors, (7137), 3200 states have return successors, (7142), 6974 states have call predecessors, (7142), 7137 states have call successors, (7142) [2021-11-25 17:58:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31489 states to 31489 states and 42426 transitions. [2021-11-25 17:58:35,851 INFO L78 Accepts]: Start accepts. Automaton has 31489 states and 42426 transitions. Word has length 476 [2021-11-25 17:58:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:35,853 INFO L470 AbstractCegarLoop]: Abstraction has 31489 states and 42426 transitions. [2021-11-25 17:58:35,853 INFO L471 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) [2021-11-25 17:58:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 31489 states and 42426 transitions. [2021-11-25 17:58:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-25 17:58:36,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:36,044 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:36,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 17:58:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 17:58:36,260 INFO L402 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)] === [2021-11-25 17:58:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 406854811, now seen corresponding path program 1 times [2021-11-25 17:58:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11140760] [2021-11-25 17:58:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:36,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-25 17:58:36,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11140760] [2021-11-25 17:58:36,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11140760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:36,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:36,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:36,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567286970] [2021-11-25 17:58:36,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:36,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:36,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:36,499 INFO L87 Difference]: Start difference. First operand 31489 states and 42426 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) [2021-11-25 17:58:39,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:42,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:42,525 INFO L93 Difference]: Finished difference Result 62906 states and 84774 transitions. [2021-11-25 17:58:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:42,547 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 [2021-11-25 17:58:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:42,696 INFO L225 Difference]: With dead ends: 62906 [2021-11-25 17:58:42,696 INFO L226 Difference]: Without dead ends: 31673 [2021-11-25 17:58:42,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:42,864 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 2 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:42,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3549 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 641 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 17:58:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31673 states. [2021-11-25 17:58:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31673 to 31609. [2021-11-25 17:58:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31609 states, 21250 states have (on average 1.3292705882352942) internal successors, (28247), 21486 states have internal predecessors, (28247), 7137 states have call successors, (7137), 3200 states have call predecessors, (7137), 3220 states have return successors, (7166), 6994 states have call predecessors, (7166), 7137 states have call successors, (7166) [2021-11-25 17:58:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31609 states to 31609 states and 42550 transitions. [2021-11-25 17:58:44,597 INFO L78 Accepts]: Start accepts. Automaton has 31609 states and 42550 transitions. Word has length 474 [2021-11-25 17:58:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:44,598 INFO L470 AbstractCegarLoop]: Abstraction has 31609 states and 42550 transitions. [2021-11-25 17:58:44,598 INFO L471 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) [2021-11-25 17:58:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 31609 states and 42550 transitions. [2021-11-25 17:58:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-25 17:58:44,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:44,624 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 17:58:44,624 INFO L402 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)] === [2021-11-25 17:58:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 676425627, now seen corresponding path program 1 times [2021-11-25 17:58:44,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436101087] [2021-11-25 17:58:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:44,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3175 trivial. 0 not checked. [2021-11-25 17:58:44,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:44,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436101087] [2021-11-25 17:58:44,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436101087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:44,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:44,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:44,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959672841] [2021-11-25 17:58:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:44,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:44,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:44,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:44,841 INFO L87 Difference]: Start difference. First operand 31609 states and 42550 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) [2021-11-25 17:58:48,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:50,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:52,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:52,730 INFO L93 Difference]: Finished difference Result 63166 states and 85042 transitions. [2021-11-25 17:58:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:52,751 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 [2021-11-25 17:58:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:52,852 INFO L225 Difference]: With dead ends: 63166 [2021-11-25 17:58:52,852 INFO L226 Difference]: Without dead ends: 31813 [2021-11-25 17:58:52,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:52,920 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 4 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:52,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3567 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 641 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-25 17:58:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31813 states. [2021-11-25 17:58:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31813 to 31709. [2021-11-25 17:58:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31709 states, 21330 states have (on average 1.3299109235818096) internal successors, (28367), 21566 states have internal predecessors, (28367), 7137 states have call successors, (7137), 3200 states have call predecessors, (7137), 3240 states have return successors, (7190), 7014 states have call predecessors, (7190), 7137 states have call successors, (7190) [2021-11-25 17:58:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31709 states to 31709 states and 42694 transitions. [2021-11-25 17:58:54,437 INFO L78 Accepts]: Start accepts. Automaton has 31709 states and 42694 transitions. Word has length 475 [2021-11-25 17:58:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:54,437 INFO L470 AbstractCegarLoop]: Abstraction has 31709 states and 42694 transitions. [2021-11-25 17:58:54,438 INFO L471 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) [2021-11-25 17:58:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 31709 states and 42694 transitions. [2021-11-25 17:58:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-25 17:58:54,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:54,451 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:58:54,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 17:58:54,452 INFO L402 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)] === [2021-11-25 17:58:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1367176333, now seen corresponding path program 1 times [2021-11-25 17:58:54,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216883817] [2021-11-25 17:58:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:54,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3152 trivial. 0 not checked. [2021-11-25 17:58:54,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216883817] [2021-11-25 17:58:54,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216883817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:54,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:54,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:54,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221830824] [2021-11-25 17:58:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:54,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:54,691 INFO L87 Difference]: Start difference. First operand 31709 states and 42694 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) [2021-11-25 17:58:59,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:59,965 INFO L93 Difference]: Finished difference Result 69897 states and 94076 transitions. [2021-11-25 17:58:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:59,966 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 [2021-11-25 17:58:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:00,126 INFO L225 Difference]: With dead ends: 69897 [2021-11-25 17:59:00,126 INFO L226 Difference]: Without dead ends: 38444 [2021-11-25 17:59:00,208 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:00,209 INFO L933 BasicCegarLoop]: 1447 mSDtfsCounter, 701 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:00,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 3449 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 17:59:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-11-25 17:59:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38438. [2021-11-25 17:59:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38438 states, 25915 states have (on average 1.3288442986687248) internal successors, (34437), 26204 states have internal predecessors, (34437), 8551 states have call successors, (8551), 3920 states have call predecessors, (8551), 3970 states have return successors, (8616), 8398 states have call predecessors, (8616), 8551 states have call successors, (8616) [2021-11-25 17:59:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38438 states to 38438 states and 51604 transitions. [2021-11-25 17:59:01,990 INFO L78 Accepts]: Start accepts. Automaton has 38438 states and 51604 transitions. Word has length 479 [2021-11-25 17:59:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:01,992 INFO L470 AbstractCegarLoop]: Abstraction has 38438 states and 51604 transitions. [2021-11-25 17:59:01,992 INFO L471 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) [2021-11-25 17:59:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38438 states and 51604 transitions. [2021-11-25 17:59:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-25 17:59:02,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:02,020 INFO L514 BasicCegarLoop]: 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] [2021-11-25 17:59:02,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 17:59:02,020 INFO L402 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)] === [2021-11-25 17:59:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1797818268, now seen corresponding path program 1 times [2021-11-25 17:59:02,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:02,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107712804] [2021-11-25 17:59:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:02,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2021-11-25 17:59:02,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:02,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107712804] [2021-11-25 17:59:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107712804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:02,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:02,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:02,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244554088] [2021-11-25 17:59:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:02,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:59:02,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:59:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:59:02,254 INFO L87 Difference]: Start difference. First operand 38438 states and 51604 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) [2021-11-25 17:59:07,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:07,787 INFO L93 Difference]: Finished difference Result 85408 states and 114719 transitions. [2021-11-25 17:59:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:59:07,787 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, (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) Word has length 489 [2021-11-25 17:59:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:07,911 INFO L225 Difference]: With dead ends: 85408 [2021-11-25 17:59:07,911 INFO L226 Difference]: Without dead ends: 47226 [2021-11-25 17:59:07,969 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:07,969 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 864 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:07,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2828 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 943 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 17:59:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47226 states. [2021-11-25 17:59:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47226 to 47195. [2021-11-25 17:59:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47195 states, 31898 states have (on average 1.3299893410245156) internal successors, (42424), 32257 states have internal predecessors, (42424), 10394 states have call successors, (10394), 4851 states have call predecessors, (10394), 4901 states have return successors, (10464), 10186 states have call predecessors, (10464), 10394 states have call successors, (10464) [2021-11-25 17:59:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47195 states to 47195 states and 63282 transitions. [2021-11-25 17:59:10,170 INFO L78 Accepts]: Start accepts. Automaton has 47195 states and 63282 transitions. Word has length 489 [2021-11-25 17:59:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:10,171 INFO L470 AbstractCegarLoop]: Abstraction has 47195 states and 63282 transitions. [2021-11-25 17:59:10,171 INFO L471 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, (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) [2021-11-25 17:59:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 47195 states and 63282 transitions. [2021-11-25 17:59:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-25 17:59:10,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:10,206 INFO L514 BasicCegarLoop]: trace histogram [36, 24, 24, 24, 24, 24, 24, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-25 17:59:10,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 17:59:10,207 INFO L402 AbstractCegarLoop]: === Iteration 20 === 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)] === [2021-11-25 17:59:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1532575998, now seen corresponding path program 1 times [2021-11-25 17:59:10,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:10,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139523722] [2021-11-25 17:59:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:10,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 3358 trivial. 0 not checked. [2021-11-25 17:59:10,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:10,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139523722] [2021-11-25 17:59:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139523722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:10,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:10,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750913093] [2021-11-25 17:59:10,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:10,468 INFO L87 Difference]: Start difference. First operand 47195 states and 63282 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-25 17:59:15,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:17,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:19,582 INFO L93 Difference]: Finished difference Result 102900 states and 137982 transitions. [2021-11-25 17:59:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) Word has length 506 [2021-11-25 17:59:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:19,890 INFO L225 Difference]: With dead ends: 102900 [2021-11-25 17:59:19,890 INFO L226 Difference]: Without dead ends: 55961 [2021-11-25 17:59:19,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:59:19,972 INFO L933 BasicCegarLoop]: 1589 mSDtfsCounter, 827 mSDsluCounter, 4761 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 5630 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:19,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 5630 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1069 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-25 17:59:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55961 states. [2021-11-25 17:59:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55961 to 55695. [2021-11-25 17:59:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55695 states, 37674 states have (on average 1.3312629399585922) internal successors, (50154), 38095 states have internal predecessors, (50154), 12228 states have call successors, (12228), 5706 states have call predecessors, (12228), 5791 states have return successors, (12335), 12003 states have call predecessors, (12335), 12228 states have call successors, (12335) [2021-11-25 17:59:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55695 states to 55695 states and 74717 transitions. [2021-11-25 17:59:22,364 INFO L78 Accepts]: Start accepts. Automaton has 55695 states and 74717 transitions. Word has length 506 [2021-11-25 17:59:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:22,365 INFO L470 AbstractCegarLoop]: Abstraction has 55695 states and 74717 transitions. [2021-11-25 17:59:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-25 17:59:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 55695 states and 74717 transitions. [2021-11-25 17:59:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-25 17:59:22,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:22,399 INFO L514 BasicCegarLoop]: trace histogram [36, 24, 24, 24, 24, 24, 24, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-25 17:59:22,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 17:59:22,400 INFO L402 AbstractCegarLoop]: === Iteration 21 === 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)] === [2021-11-25 17:59:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1051090239, now seen corresponding path program 1 times [2021-11-25 17:59:22,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:22,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067246496] [2021-11-25 17:59:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:22,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3399 trivial. 0 not checked. [2021-11-25 17:59:22,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:22,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067246496] [2021-11-25 17:59:22,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067246496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:59:22,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235317621] [2021-11-25 17:59:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:22,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:22,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:22,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8aec59e4-44d2-4f46-84ce-9715acb5eda6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:59:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:59:23,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3408 trivial. 0 not checked. [2021-11-25 17:59:24,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235317621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:24,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:59:24,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-25 17:59:24,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432760334] [2021-11-25 17:59:24,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:24,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:24,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:59:24,306 INFO L87 Difference]: Start difference. First operand 55695 states and 74717 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-25 17:59:28,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:30,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:30,921 INFO L93 Difference]: Finished difference Result 111349 states and 149403 transitions. [2021-11-25 17:59:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (54), 2 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 507 [2021-11-25 17:59:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:31,287 INFO L225 Difference]: With dead ends: 111349 [2021-11-25 17:59:31,288 INFO L226 Difference]: Without dead ends: 55910 [2021-11-25 17:59:31,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:59:31,379 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 3 mSDsluCounter, 3122 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3541 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:31,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3541 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 648 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 17:59:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55910 states.