./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs --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 92fce7e8733fef6ba8e1d7d5b12f8bb98a90f9164efa69e5285fd66b003407a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:51:10,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:51:10,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:51:10,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:51:10,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:51:10,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:51:10,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:51:10,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:51:10,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:51:10,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:51:10,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:51:10,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:51:10,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:51:10,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:51:10,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:51:10,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:51:10,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:51:10,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:51:10,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:51:10,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:51:10,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:51:10,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:51:10,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:51:10,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:51:10,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:51:10,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:51:10,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:51:10,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:51:10,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:51:10,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:51:10,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:51:10,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:51:10,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:51:10,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:51:10,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:51:10,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:51:10,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:51:10,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:51:10,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:51:10,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:51:10,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:51:10,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:51:10,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:51:10,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:51:10,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:51:10,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:51:10,971 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:51:10,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:51:10,972 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:51:10,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:51:10,972 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:51:10,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:51:10,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:51:10,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:51:10,973 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:51:10,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:51:10,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:51:10,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:51:10,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:51:10,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:51:10,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:51:10,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:51:10,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:51:10,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:51:10,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:51:10,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:51:10,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:51:10,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:51:10,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:51:10,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:51:10,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:10,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:51:10,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:51:10,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:51:10,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:51:10,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:51:10,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:51:10,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:51:10,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:51:10,980 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92fce7e8733fef6ba8e1d7d5b12f8bb98a90f9164efa69e5285fd66b003407a0 [2021-11-19 15:51:11,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:51:11,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:51:11,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:51:11,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:51:11,351 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:51:11,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i [2021-11-19 15:51:11,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/a1da357e1/0a22d3681a044ce2b9441e2199592698/FLAG690daa39e [2021-11-19 15:51:12,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:51:12,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i [2021-11-19 15:51:13,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/a1da357e1/0a22d3681a044ce2b9441e2199592698/FLAG690daa39e [2021-11-19 15:51:13,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/a1da357e1/0a22d3681a044ce2b9441e2199592698 [2021-11-19 15:51:13,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:51:13,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:51:13,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:13,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:51:13,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:51:13,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:13" (1/1) ... [2021-11-19 15:51:13,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55831bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:13, skipping insertion in model container [2021-11-19 15:51:13,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:13" (1/1) ... [2021-11-19 15:51:13,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:51:13,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:17,056 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,074 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,197 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,199 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,211 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,213 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,399 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,565 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:17,566 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:19,901 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,142 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,144 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,378 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,468 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,469 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,516 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,517 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,539 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,563 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:21,591 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 15:51:23,247 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622479,622492] [2021-11-19 15:51:23,250 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622648,622661] [2021-11-19 15:51:23,251 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622815,622828] [2021-11-19 15:51:23,252 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622983,622996] [2021-11-19 15:51:23,309 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:23,416 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:51:23,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@748e9d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:23, skipping insertion in model container [2021-11-19 15:51:23,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:23,418 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:51:23,421 INFO L158 Benchmark]: Toolchain (without parser) took 10053.01ms. Allocated memory was 98.6MB in the beginning and 220.2MB in the end (delta: 121.6MB). Free memory was 53.2MB in the beginning and 126.9MB in the end (delta: -73.7MB). Peak memory consumption was 88.8MB. Max. memory is 16.1GB. [2021-11-19 15:51:23,422 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 73.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:51:23,424 INFO L158 Benchmark]: CACSL2BoogieTranslator took 10049.18ms. Allocated memory was 98.6MB in the beginning and 220.2MB in the end (delta: 121.6MB). Free memory was 52.9MB in the beginning and 126.9MB in the end (delta: -74.0MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. [2021-11-19 15:51:23,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 73.7MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 10049.18ms. Allocated memory was 98.6MB in the beginning and 220.2MB in the end (delta: 121.6MB). Free memory was 52.9MB in the beginning and 126.9MB in the end (delta: -74.0MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7279]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs --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 92fce7e8733fef6ba8e1d7d5b12f8bb98a90f9164efa69e5285fd66b003407a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:51:26,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:51:26,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:51:26,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:51:26,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:51:26,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:51:26,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:51:26,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:51:26,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:51:26,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:51:26,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:51:26,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:51:26,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:51:26,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:51:26,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:51:26,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:51:26,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:51:26,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:51:26,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:51:26,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:51:26,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:51:26,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:51:26,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:51:26,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:51:26,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:51:26,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:51:26,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:51:26,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:51:26,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:51:26,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:51:26,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:51:26,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:51:26,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:51:26,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:51:26,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:51:26,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:51:26,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:51:26,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:51:26,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:51:26,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:51:26,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:51:26,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:51:26,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:51:26,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:51:26,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:51:26,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:51:26,395 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:51:26,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:51:26,396 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:51:26,396 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:51:26,397 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:51:26,397 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:51:26,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:51:26,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:51:26,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:51:26,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:51:26,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:51:26,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:51:26,401 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:51:26,401 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:51:26,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:51:26,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:51:26,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:51:26,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:51:26,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:51:26,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:51:26,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:26,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:51:26,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:51:26,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:51:26,405 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:51:26,405 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:26,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:51:26,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:51:26,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:51:26,407 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92fce7e8733fef6ba8e1d7d5b12f8bb98a90f9164efa69e5285fd66b003407a0 [2021-11-19 15:51:26,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:51:26,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:51:26,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:51:26,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:51:26,925 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:51:26,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i [2021-11-19 15:51:27,039 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/22dc540ca/13379f3c01f9460e8b37c2064fe64297/FLAG48eef09bf [2021-11-19 15:51:28,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:51:28,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i [2021-11-19 15:51:28,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/22dc540ca/13379f3c01f9460e8b37c2064fe64297/FLAG48eef09bf [2021-11-19 15:51:29,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/data/22dc540ca/13379f3c01f9460e8b37c2064fe64297 [2021-11-19 15:51:29,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:51:29,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:51:29,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:29,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:51:29,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:51:29,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:29" (1/1) ... [2021-11-19 15:51:29,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732a243b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:29, skipping insertion in model container [2021-11-19 15:51:29,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:51:29" (1/1) ... [2021-11-19 15:51:29,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:51:29,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:38,775 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622479,622492] [2021-11-19 15:51:38,779 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622648,622661] [2021-11-19 15:51:38,780 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622815,622828] [2021-11-19 15:51:38,781 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622983,622996] [2021-11-19 15:51:38,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:39,005 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:51:39,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:51:40,043 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622479,622492] [2021-11-19 15:51:40,044 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622648,622661] [2021-11-19 15:51:40,044 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622815,622828] [2021-11-19 15:51:40,045 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622983,622996] [2021-11-19 15:51:40,058 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:40,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:51:41,186 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622479,622492] [2021-11-19 15:51:41,187 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622648,622661] [2021-11-19 15:51:41,188 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622815,622828] [2021-11-19 15:51:41,194 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_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i[622983,622996] [2021-11-19 15:51:41,210 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:51:41,944 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:51:41,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41 WrapperNode [2021-11-19 15:51:41,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:51:41,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:51:41,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:51:41,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:51:41,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:42,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:42,953 INFO L137 Inliner]: procedures = 795, calls = 5890, calls flagged for inlining = 431, calls inlined = 378, statements flattened = 13898 [2021-11-19 15:51:42,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:51:42,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:51:42,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:51:42,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:51:42,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:42,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:51:43,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:51:43,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:51:43,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:51:43,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (1/1) ... [2021-11-19 15:51:43,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:51:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:51:43,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:51:43,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:51:43,963 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_sge_intr_msix [2021-11-19 15:51:43,964 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_sge_intr_msix [2021-11-19 15:51:43,964 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-19 15:51:43,964 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-19 15:51:43,964 INFO L130 BoogieDeclarations]: Found specification of procedure seq_putc [2021-11-19 15:51:43,965 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_putc [2021-11-19 15:51:43,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 15:51:43,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 15:51:43,965 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 15:51:43,965 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 15:51:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 15:51:43,966 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 15:51:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup_debugfs [2021-11-19 15:51:43,966 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup_debugfs [2021-11-19 15:51:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-19 15:51:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-19 15:51:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_sw_desc [2021-11-19 15:51:43,967 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_sw_desc [2021-11-19 15:51:43,967 INFO L130 BoogieDeclarations]: Found specification of procedure is_t4 [2021-11-19 15:51:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure is_t4 [2021-11-19 15:51:43,968 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-19 15:51:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-19 15:51:43,968 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-19 15:51:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-19 15:51:43,969 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-19 15:51:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-19 15:51:43,970 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_dir [2021-11-19 15:51:43,970 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_dir [2021-11-19 15:51:43,970 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-19 15:51:43,971 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-19 15:51:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure is_new_response [2021-11-19 15:51:43,971 INFO L138 BoogieDeclarations]: Found implementation of procedure is_new_response [2021-11-19 15:51:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure __napi_schedule [2021-11-19 15:51:43,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __napi_schedule [2021-11-19 15:51:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 15:51:43,972 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 15:51:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure qenable [2021-11-19 15:51:43,973 INFO L138 BoogieDeclarations]: Found implementation of procedure qenable [2021-11-19 15:51:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2021-11-19 15:51:43,973 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2021-11-19 15:51:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure is_10g_port [2021-11-19 15:51:43,974 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10g_port [2021-11-19 15:51:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 15:51:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 15:51:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure seq_open [2021-11-19 15:51:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_open [2021-11-19 15:51:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header_len [2021-11-19 15:51:43,977 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header_len [2021-11-19 15:51:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-19 15:51:43,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-19 15:51:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_get_port_stats [2021-11-19 15:51:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_get_port_stats [2021-11-19 15:51:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-19 15:51:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-19 15:51:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure free_tx_desc [2021-11-19 15:51:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tx_desc [2021-11-19 15:51:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_wr_mbox_core [2021-11-19 15:51:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_wr_mbox_core [2021-11-19 15:51:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_offset [2021-11-19 15:51:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_offset [2021-11-19 15:51:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure netdev2adap [2021-11-19 15:51:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev2adap [2021-11-19 15:51:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 15:51:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 15:51:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-19 15:51:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-19 15:51:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 15:51:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 15:51:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure core_ticks_to_us [2021-11-19 15:51:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure core_ticks_to_us [2021-11-19 15:51:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 15:51:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 15:51:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:51:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-19 15:51:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-19 15:51:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-19 15:51:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-19 15:51:43,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_3 [2021-11-19 15:51:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_3 [2021-11-19 15:51:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-19 15:51:43,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-19 15:51:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-19 15:51:43,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-19 15:51:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:51:43,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 15:51:43,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 15:51:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:51:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 15:51:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-19 15:51:43,990 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-19 15:51:43,990 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_change_mac [2021-11-19 15:51:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_change_mac [2021-11-19 15:51:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure fl_starving [2021-11-19 15:51:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure fl_starving [2021-11-19 15:51:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure adapter_down [2021-11-19 15:51:43,992 INFO L138 BoogieDeclarations]: Found implementation of procedure adapter_down [2021-11-19 15:51:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-19 15:51:43,992 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-19 15:51:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure netdev2pinfo [2021-11-19 15:51:43,993 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev2pinfo [2021-11-19 15:51:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_free_vi [2021-11-19 15:51:43,993 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_free_vi [2021-11-19 15:51:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-19 15:51:43,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-19 15:51:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_free_sge_resources [2021-11-19 15:51:43,999 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_free_sge_resources [2021-11-19 15:51:43,999 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-19 15:51:43,999 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-19 15:51:44,000 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 15:51:44,001 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 15:51:44,002 INFO L130 BoogieDeclarations]: Found specification of procedure t4_read_reg [2021-11-19 15:51:44,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t4_read_reg [2021-11-19 15:51:44,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 15:51:44,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 15:51:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 15:51:44,010 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 15:51:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule_prep [2021-11-19 15:51:44,010 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule_prep [2021-11-19 15:51:44,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:51:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:51:44,011 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-19 15:51:44,012 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-19 15:51:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure is_eth_imm [2021-11-19 15:51:44,012 INFO L138 BoogieDeclarations]: Found implementation of procedure is_eth_imm [2021-11-19 15:51:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 15:51:44,012 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-19 15:51:44,013 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-19 15:51:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-19 15:51:44,013 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-19 15:51:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure is_buf_mapped [2021-11-19 15:51:44,013 INFO L138 BoogieDeclarations]: Found implementation of procedure is_buf_mapped [2021-11-19 15:51:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-19 15:51:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-19 15:51:44,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-19 15:51:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 15:51:44,014 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 15:51:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-19 15:51:44,015 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-19 15:51:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure reg_block_dump [2021-11-19 15:51:44,015 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_block_dump [2021-11-19 15:51:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-19 15:51:44,016 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-19 15:51:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:51:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:51:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-19 15:51:44,016 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-19 15:51:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_pci_shutdown [2021-11-19 15:51:44,017 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_pci_shutdown [2021-11-19 15:51:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-19 15:51:44,017 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-19 15:51:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 15:51:44,018 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 15:51:44,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 15:51:44,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 15:51:44,018 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-19 15:51:44,018 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-19 15:51:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-19 15:51:44,019 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-19 15:51:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_set_rxmode [2021-11-19 15:51:44,019 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_set_rxmode [2021-11-19 15:51:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 15:51:44,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 15:51:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 15:51:44,020 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 15:51:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_held [2021-11-19 15:51:44,020 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_held [2021-11-19 15:51:44,021 INFO L130 BoogieDeclarations]: Found specification of procedure get_buf_addr [2021-11-19 15:51:44,021 INFO L138 BoogieDeclarations]: Found implementation of procedure get_buf_addr [2021-11-19 15:51:44,021 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_wr_mbox [2021-11-19 15:51:44,021 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_wr_mbox [2021-11-19 15:51:44,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 15:51:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 15:51:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 15:51:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 15:51:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 15:51:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 15:51:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure interfaces_get_idx [2021-11-19 15:51:44,023 INFO L138 BoogieDeclarations]: Found implementation of procedure interfaces_get_idx [2021-11-19 15:51:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_pci_remove [2021-11-19 15:51:44,023 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_pci_remove [2021-11-19 15:51:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-19 15:51:44,024 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-19 15:51:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_set_params [2021-11-19 15:51:44,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_set_params [2021-11-19 15:51:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 15:51:44,024 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 15:51:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 15:51:44,025 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 15:51:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-19 15:51:44,025 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-19 15:51:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_get_regs_len [2021-11-19 15:51:44,026 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_get_regs_len [2021-11-19 15:51:44,026 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_open [2021-11-19 15:51:44,026 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_open [2021-11-19 15:51:44,026 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-19 15:51:44,026 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-19 15:51:44,027 INFO L130 BoogieDeclarations]: Found specification of procedure refill_fl [2021-11-19 15:51:44,027 INFO L138 BoogieDeclarations]: Found implementation of procedure refill_fl [2021-11-19 15:51:44,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 15:51:44,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 15:51:44,027 INFO L130 BoogieDeclarations]: Found specification of procedure free_rx_bufs [2021-11-19 15:51:44,028 INFO L138 BoogieDeclarations]: Found implementation of procedure free_rx_bufs [2021-11-19 15:51:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 15:51:44,028 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 15:51:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2021-11-19 15:51:44,028 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2021-11-19 15:51:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-19 15:51:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-19 15:51:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_query_params [2021-11-19 15:51:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_query_params [2021-11-19 15:51:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 15:51:44,030 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 15:51:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 15:51:44,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 15:51:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure poison_buf [2021-11-19 15:51:44,030 INFO L138 BoogieDeclarations]: Found implementation of procedure poison_buf [2021-11-19 15:51:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 15:51:44,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 15:51:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-19 15:51:44,031 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-19 15:51:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 15:51:44,032 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 15:51:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 15:51:44,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 15:51:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:51:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 15:51:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:51:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 15:51:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove [2021-11-19 15:51:44,033 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove [2021-11-19 15:51:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 15:51:44,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-19 15:51:44,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-19 15:51:44,040 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 15:51:44,040 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 15:51:44,040 INFO L130 BoogieDeclarations]: Found specification of procedure sge_qstats_entries [2021-11-19 15:51:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure sge_qstats_entries [2021-11-19 15:51:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure fl_cap [2021-11-19 15:51:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure fl_cap [2021-11-19 15:51:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-19 15:51:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-19 15:51:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 15:51:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 15:51:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_ring [2021-11-19 15:51:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_ring [2021-11-19 15:51:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 15:51:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 15:51:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 15:51:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 15:51:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_alloc_mac_filt [2021-11-19 15:51:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_alloc_mac_filt [2021-11-19 15:51:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-19 15:51:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-19 15:51:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 15:51:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 15:51:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove_recursive [2021-11-19 15:51:44,048 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove_recursive [2021-11-19 15:51:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_set_rxmode [2021-11-19 15:51:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_set_rxmode [2021-11-19 15:51:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_cxgb4vf_module_exit_22_2 [2021-11-19 15:51:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_cxgb4vf_module_exit_22_2 [2021-11-19 15:51:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure init_rspq [2021-11-19 15:51:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure init_rspq [2021-11-19 15:51:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure adap2pinfo [2021-11-19 15:51:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure adap2pinfo [2021-11-19 15:51:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2021-11-19 15:51:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2021-11-19 15:51:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_stop [2021-11-19 15:51:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_stop [2021-11-19 15:51:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_seq_open [2021-11-19 15:51:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_seq_open [2021-11-19 15:51:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 15:51:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 15:51:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:51:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:51:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 15:51:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-19 15:51:44,053 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-19 15:51:44,053 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_enable_vi [2021-11-19 15:51:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_enable_vi [2021-11-19 15:51:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-19 15:51:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-19 15:51:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 15:51:44,054 INFO L130 BoogieDeclarations]: Found specification of procedure cxgb4vf_poll_controller [2021-11-19 15:51:44,054 INFO L138 BoogieDeclarations]: Found implementation of procedure cxgb4vf_poll_controller [2021-11-19 15:51:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-19 15:51:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-19 15:51:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:51:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 15:51:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:51:44,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 15:51:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 15:51:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 15:51:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 15:51:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure reclaimable [2021-11-19 15:51:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reclaimable [2021-11-19 15:51:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 15:51:44,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 15:51:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-19 15:51:44,057 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-19 15:51:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_intr_handler [2021-11-19 15:51:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_intr_handler [2021-11-19 15:51:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-19 15:51:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_try [2021-11-19 15:51:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2021-11-19 15:51:44,058 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2021-11-19 15:51:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_bits [2021-11-19 15:51:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_bits [2021-11-19 15:51:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-19 15:51:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-19 15:51:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure qtimer_val [2021-11-19 15:51:44,059 INFO L138 BoogieDeclarations]: Found implementation of procedure qtimer_val [2021-11-19 15:51:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msix [2021-11-19 15:51:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msix [2021-11-19 15:51:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2021-11-19 15:51:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2021-11-19 15:51:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 15:51:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 15:51:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure rspq_next [2021-11-19 15:51:44,061 INFO L138 BoogieDeclarations]: Found implementation of procedure rspq_next [2021-11-19 15:51:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure dump_mbox [2021-11-19 15:51:44,061 INFO L138 BoogieDeclarations]: Found implementation of procedure dump_mbox [2021-11-19 15:51:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure t4_write_reg [2021-11-19 15:51:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure t4_write_reg [2021-11-19 15:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure txq_stop [2021-11-19 15:51:44,062 INFO L138 BoogieDeclarations]: Found implementation of procedure txq_stop [2021-11-19 15:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 15:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 15:51:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 15:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-19 15:51:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-19 15:51:44,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-19 15:51:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-19 15:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 15:51:44,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 15:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-19 15:51:44,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-19 15:51:44,064 INFO L130 BoogieDeclarations]: Found specification of procedure t4_read_reg64 [2021-11-19 15:51:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure t4_read_reg64 [2021-11-19 15:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_weight [2021-11-19 15:51:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_weight [2021-11-19 15:51:44,065 INFO L130 BoogieDeclarations]: Found specification of procedure free_rspq_fl [2021-11-19 15:51:44,065 INFO L138 BoogieDeclarations]: Found implementation of procedure free_rspq_fl [2021-11-19 15:51:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 15:51:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 15:51:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 15:51:44,066 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 15:51:44,066 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-19 15:51:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-19 15:51:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 15:51:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 15:51:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-19 15:51:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-19 15:51:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure sge_queue_entries [2021-11-19 15:51:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure sge_queue_entries [2021-11-19 15:51:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure seq_release [2021-11-19 15:51:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_release [2021-11-19 15:51:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure get_buf_size [2021-11-19 15:51:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure get_buf_size [2021-11-19 15:51:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-19 15:51:44,069 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-19 15:51:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure __ilog2_u32 [2021-11-19 15:51:44,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __ilog2_u32 [2021-11-19 15:51:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-19 15:51:44,070 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-19 15:51:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab64 [2021-11-19 15:51:44,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab64 [2021-11-19 15:51:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 15:51:44,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 15:51:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-19 15:51:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-19 15:51:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure pci_clear_master [2021-11-19 15:51:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_clear_master [2021-11-19 15:51:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-19 15:51:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-19 15:51:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure t4vf_sge_alloc_rxq [2021-11-19 15:51:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure t4vf_sge_alloc_rxq [2021-11-19 15:51:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 15:51:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 15:51:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-19 15:51:44,074 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-19 15:51:46,326 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:51:46,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:51:46,658 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 15:53:16,170 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-19 15:53:16,289 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:53:16,342 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:53:16,342 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-19 15:53:16,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:53:16 BoogieIcfgContainer [2021-11-19 15:53:16,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:53:16,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:53:16,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:53:16,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:53:16,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:51:29" (1/3) ... [2021-11-19 15:53:16,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46189497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:53:16, skipping insertion in model container [2021-11-19 15:53:16,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:51:41" (2/3) ... [2021-11-19 15:53:16,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46189497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:53:16, skipping insertion in model container [2021-11-19 15:53:16,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:53:16" (3/3) ... [2021-11-19 15:53:16,369 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-chelsio-cxgb4vf-cxgb4vf.cil.i [2021-11-19 15:53:16,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:53:16,376 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 15:53:16,480 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:53:16,496 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 [2021-11-19 15:53:16,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 15:53:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 4120 states, 2895 states have (on average 1.2860103626943005) internal successors, (3723), 2933 states have internal predecessors, (3723), 1047 states have call successors, (1047), 175 states have call predecessors, (1047), 174 states have return successors, (1038), 1033 states have call predecessors, (1038), 1038 states have call successors, (1038) [2021-11-19 15:53:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-19 15:53:16,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:53:16,693 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:53:16,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:53:16,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1924095574, now seen corresponding path program 1 times [2021-11-19 15:53:16,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:16,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340311487] [2021-11-19 15:53:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:16,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:16,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:16,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:16,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:53:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 5255 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:53:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 14877 trivial. 0 not checked. [2021-11-19 15:53:25,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15051 trivial. 0 not checked. [2021-11-19 15:53:27,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:27,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340311487] [2021-11-19 15:53:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340311487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:53:27,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:53:27,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:53:27,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068990363] [2021-11-19 15:53:27,234 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:27,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:53:27,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:53:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:53:27,309 INFO L87 Difference]: Start difference. First operand has 4120 states, 2895 states have (on average 1.2860103626943005) internal successors, (3723), 2933 states have internal predecessors, (3723), 1047 states have call successors, (1047), 175 states have call predecessors, (1047), 174 states have return successors, (1038), 1033 states have call predecessors, (1038), 1038 states have call successors, (1038) Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) [2021-11-19 15:53:29,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:53:43,313 INFO L93 Difference]: Finished difference Result 15760 states and 22399 transitions. [2021-11-19 15:53:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:53:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) Word has length 667 [2021-11-19 15:53:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:53:43,475 INFO L225 Difference]: With dead ends: 15760 [2021-11-19 15:53:43,475 INFO L226 Difference]: Without dead ends: 11737 [2021-11-19 15:53:43,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:53:43,522 INFO L933 BasicCegarLoop]: 7594 mSDtfsCounter, 10834 mSDsluCounter, 10216 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10834 SdHoareTripleChecker+Valid, 17810 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:53:43,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10834 Valid, 17810 Invalid, 2010 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 1987 Invalid, 1 Unknown, 0 Unchecked, 14.6s Time] [2021-11-19 15:53:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-11-19 15:53:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 11703. [2021-11-19 15:53:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11703 states, 8271 states have (on average 1.2721557248216662) internal successors, (10522), 8374 states have internal predecessors, (10522), 2914 states have call successors, (2914), 515 states have call predecessors, (2914), 514 states have return successors, (2910), 2895 states have call predecessors, (2910), 2910 states have call successors, (2910) [2021-11-19 15:53:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11703 states to 11703 states and 16346 transitions. [2021-11-19 15:53:44,553 INFO L78 Accepts]: Start accepts. Automaton has 11703 states and 16346 transitions. Word has length 667 [2021-11-19 15:53:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:53:44,557 INFO L470 AbstractCegarLoop]: Abstraction has 11703 states and 16346 transitions. [2021-11-19 15:53:44,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 4 states have call successors, (65), 3 states have call predecessors, (65), 3 states have return successors, (63), 4 states have call predecessors, (63), 4 states have call successors, (63) [2021-11-19 15:53:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11703 states and 16346 transitions. [2021-11-19 15:53:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-11-19 15:53:44,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:53:44,591 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:53:44,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:53:44,805 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:53:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -159743776, now seen corresponding path program 1 times [2021-11-19 15:53:44,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:44,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261969592] [2021-11-19 15:53:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:44,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:44,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:44,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:44,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:53:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 5330 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:53:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 14877 trivial. 0 not checked. [2021-11-19 15:53:52,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15051 trivial. 0 not checked. [2021-11-19 15:53:54,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:54,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261969592] [2021-11-19 15:53:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261969592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:53:54,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:53:54,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:53:54,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663025824] [2021-11-19 15:53:54,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:53:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:53:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:53:54,505 INFO L87 Difference]: Start difference. First operand 11703 states and 16346 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) [2021-11-19 15:53:56,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:02,964 INFO L93 Difference]: Finished difference Result 23040 states and 32159 transitions. [2021-11-19 15:54:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:54:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) Word has length 688 [2021-11-19 15:54:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:03,081 INFO L225 Difference]: With dead ends: 23040 [2021-11-19 15:54:03,082 INFO L226 Difference]: Without dead ends: 11458 [2021-11-19 15:54:03,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1374 GetRequests, 1372 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:54:03,142 INFO L933 BasicCegarLoop]: 5564 mSDtfsCounter, 8969 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8969 SdHoareTripleChecker+Valid, 5639 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8969 Valid, 5639 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1911 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-19 15:54:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11458 states. [2021-11-19 15:54:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11458 to 11458. [2021-11-19 15:54:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 8085 states have (on average 1.2714904143475572) internal successors, (10280), 8184 states have internal predecessors, (10280), 2855 states have call successors, (2855), 516 states have call predecessors, (2855), 515 states have return successors, (2851), 2836 states have call predecessors, (2851), 2851 states have call successors, (2851) [2021-11-19 15:54:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 15986 transitions. [2021-11-19 15:54:03,982 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 15986 transitions. Word has length 688 [2021-11-19 15:54:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:03,985 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 15986 transitions. [2021-11-19 15:54:03,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (68), 3 states have call predecessors, (68), 3 states have return successors, (67), 4 states have call predecessors, (67), 4 states have call successors, (67) [2021-11-19 15:54:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 15986 transitions. [2021-11-19 15:54:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-11-19 15:54:04,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:04,021 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:04,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:04,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:04,243 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:54:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash -975242259, now seen corresponding path program 1 times [2021-11-19 15:54:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:04,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335915417] [2021-11-19 15:54:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:04,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:04,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:04,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:54:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 5319 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:54:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 14877 trivial. 0 not checked. [2021-11-19 15:54:11,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15051 trivial. 0 not checked. [2021-11-19 15:54:13,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:13,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335915417] [2021-11-19 15:54:13,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335915417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:54:13,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:54:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 15:54:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418530974] [2021-11-19 15:54:13,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:54:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:54:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:54:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:54:13,462 INFO L87 Difference]: Start difference. First operand 11458 states and 15986 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2021-11-19 15:54:15,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:17,301 INFO L93 Difference]: Finished difference Result 31245 states and 43576 transitions. [2021-11-19 15:54:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:54:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) Word has length 692 [2021-11-19 15:54:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:17,456 INFO L225 Difference]: With dead ends: 31245 [2021-11-19 15:54:17,456 INFO L226 Difference]: Without dead ends: 19929 [2021-11-19 15:54:17,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1381 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:54:17,515 INFO L933 BasicCegarLoop]: 6311 mSDtfsCounter, 4019 mSDsluCounter, 5442 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4019 SdHoareTripleChecker+Valid, 11753 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:17,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4019 Valid, 11753 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:54:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19929 states. [2021-11-19 15:54:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19929 to 19886. [2021-11-19 15:54:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19886 states, 14000 states have (on average 1.2722857142857142) internal successors, (17812), 14187 states have internal predecessors, (17812), 4951 states have call successors, (4951), 933 states have call predecessors, (4951), 932 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:54:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19886 states to 19886 states and 27719 transitions. [2021-11-19 15:54:18,997 INFO L78 Accepts]: Start accepts. Automaton has 19886 states and 27719 transitions. Word has length 692 [2021-11-19 15:54:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:19,000 INFO L470 AbstractCegarLoop]: Abstraction has 19886 states and 27719 transitions. [2021-11-19 15:54:19,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2021-11-19 15:54:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 19886 states and 27719 transitions. [2021-11-19 15:54:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2021-11-19 15:54:19,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:19,043 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 58, 58, 58, 58, 58, 58, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:19,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:19,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:19,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:54:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1859408396, now seen corresponding path program 1 times [2021-11-19 15:54:19,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:19,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120862598] [2021-11-19 15:54:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:19,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:19,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:54:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 5322 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:54:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15431 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 15058 trivial. 0 not checked. [2021-11-19 15:54:30,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15431 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-19 15:54:33,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:33,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120862598] [2021-11-19 15:54:33,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120862598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:54:33,542 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:54:33,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 15:54:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299912234] [2021-11-19 15:54:33,543 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:54:33,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:54:33,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:54:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:54:33,547 INFO L87 Difference]: Start difference. First operand 19886 states and 27719 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 4 states have call successors, (134), 3 states have call predecessors, (134), 3 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) [2021-11-19 15:54:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:38,240 INFO L93 Difference]: Finished difference Result 39630 states and 55237 transitions. [2021-11-19 15:54:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:54:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 4 states have call successors, (134), 3 states have call predecessors, (134), 3 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) Word has length 710 [2021-11-19 15:54:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:38,367 INFO L225 Difference]: With dead ends: 39630 [2021-11-19 15:54:38,367 INFO L226 Difference]: Without dead ends: 19886 [2021-11-19 15:54:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1416 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:54:38,447 INFO L933 BasicCegarLoop]: 5538 mSDtfsCounter, 8771 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8771 SdHoareTripleChecker+Valid, 5538 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1972 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:38,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8771 Valid, 5538 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1972 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-19 15:54:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19886 states. [2021-11-19 15:54:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19886 to 19886. [2021-11-19 15:54:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19886 states, 14000 states have (on average 1.2712857142857144) internal successors, (17798), 14187 states have internal predecessors, (17798), 4951 states have call successors, (4951), 933 states have call predecessors, (4951), 932 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:54:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19886 states to 19886 states and 27705 transitions. [2021-11-19 15:54:39,958 INFO L78 Accepts]: Start accepts. Automaton has 19886 states and 27705 transitions. Word has length 710 [2021-11-19 15:54:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:39,960 INFO L470 AbstractCegarLoop]: Abstraction has 19886 states and 27705 transitions. [2021-11-19 15:54:39,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 4 states have call successors, (134), 3 states have call predecessors, (134), 3 states have return successors, (132), 4 states have call predecessors, (132), 4 states have call successors, (132) [2021-11-19 15:54:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand 19886 states and 27705 transitions. [2021-11-19 15:54:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-11-19 15:54:39,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:39,987 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:40,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:40,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:40,202 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:54:40,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash 409005650, now seen corresponding path program 1 times [2021-11-19 15:54:40,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:40,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482853440] [2021-11-19 15:54:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:40,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:40,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:40,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:54:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 5441 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:54:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16160 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 15765 trivial. 0 not checked. [2021-11-19 15:54:48,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16160 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2021-11-19 15:54:51,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:51,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482853440] [2021-11-19 15:54:51,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482853440] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:54:51,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:54:51,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 16 [2021-11-19 15:54:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146736138] [2021-11-19 15:54:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:54:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:54:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:54:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:54:51,560 INFO L87 Difference]: Start difference. First operand 19886 states and 27705 transitions. Second operand has 14 states, 12 states have (on average 11.333333333333334) internal successors, (136), 13 states have internal predecessors, (136), 4 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (71), 4 states have call predecessors, (71), 4 states have call successors, (71) [2021-11-19 15:55:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:07,775 INFO L93 Difference]: Finished difference Result 45479 states and 64908 transitions. [2021-11-19 15:55:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:55:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 11.333333333333334) internal successors, (136), 13 states have internal predecessors, (136), 4 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (71), 4 states have call predecessors, (71), 4 states have call successors, (71) Word has length 753 [2021-11-19 15:55:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:07,990 INFO L225 Difference]: With dead ends: 45479 [2021-11-19 15:55:07,991 INFO L226 Difference]: Without dead ends: 32162 [2021-11-19 15:55:08,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1491 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:55:08,047 INFO L933 BasicCegarLoop]: 8665 mSDtfsCounter, 8937 mSDsluCounter, 92769 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 1987 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9433 SdHoareTripleChecker+Valid, 101434 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1987 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:08,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9433 Valid, 101434 Invalid, 4988 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1987 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2021-11-19 15:55:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32162 states. [2021-11-19 15:55:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32162 to 19892. [2021-11-19 15:55:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19892 states, 14006 states have (on average 1.2711694987862345) internal successors, (17804), 14193 states have internal predecessors, (17804), 4951 states have call successors, (4951), 933 states have call predecessors, (4951), 932 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:55:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19892 states to 19892 states and 27711 transitions. [2021-11-19 15:55:10,309 INFO L78 Accepts]: Start accepts. Automaton has 19892 states and 27711 transitions. Word has length 753 [2021-11-19 15:55:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 19892 states and 27711 transitions. [2021-11-19 15:55:10,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 11.333333333333334) internal successors, (136), 13 states have internal predecessors, (136), 4 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (71), 4 states have call predecessors, (71), 4 states have call successors, (71) [2021-11-19 15:55:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 19892 states and 27711 transitions. [2021-11-19 15:55:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2021-11-19 15:55:10,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:10,344 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:55:10,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:10,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:55:10,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:55:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash -148667292, now seen corresponding path program 1 times [2021-11-19 15:55:10,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:10,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741742411] [2021-11-19 15:55:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:10,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:10,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:55:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 5458 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:55:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16176 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15774 trivial. 0 not checked. [2021-11-19 15:55:20,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16176 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 16144 trivial. 0 not checked. [2021-11-19 15:55:23,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741742411] [2021-11-19 15:55:23,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741742411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:55:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044511875] [2021-11-19 15:55:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:55:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:55:23,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:55:23,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 15:55:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 5458 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:55:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16176 trivial. 0 not checked. [2021-11-19 15:55:32,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16176 trivial. 0 not checked. [2021-11-19 15:55:35,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044511875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:55:35,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:55:35,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [18, 18] total 28 [2021-11-19 15:55:35,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864918196] [2021-11-19 15:55:35,260 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:55:35,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:55:35,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:55:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:55:35,264 INFO L87 Difference]: Start difference. First operand 19892 states and 27711 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (145), 4 states have call predecessors, (145), 2 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2021-11-19 15:55:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:36,627 INFO L93 Difference]: Finished difference Result 19898 states and 27716 transitions. [2021-11-19 15:55:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:55:36,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (145), 4 states have call predecessors, (145), 2 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) Word has length 761 [2021-11-19 15:55:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:36,742 INFO L225 Difference]: With dead ends: 19898 [2021-11-19 15:55:36,742 INFO L226 Difference]: Without dead ends: 19896 [2021-11-19 15:55:36,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3043 GetRequests, 3014 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:55:36,756 INFO L933 BasicCegarLoop]: 5538 mSDtfsCounter, 5278 mSDsluCounter, 11060 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5293 SdHoareTripleChecker+Valid, 16598 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:36,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5293 Valid, 16598 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:55:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19896 states. [2021-11-19 15:55:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19896 to 19896. [2021-11-19 15:55:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19896 states, 14009 states have (on average 1.271111428367478) internal successors, (17807), 14196 states have internal predecessors, (17807), 4951 states have call successors, (4951), 934 states have call predecessors, (4951), 933 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:55:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19896 states to 19896 states and 27714 transitions. [2021-11-19 15:55:38,911 INFO L78 Accepts]: Start accepts. Automaton has 19896 states and 27714 transitions. Word has length 761 [2021-11-19 15:55:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:38,913 INFO L470 AbstractCegarLoop]: Abstraction has 19896 states and 27714 transitions. [2021-11-19 15:55:38,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (145), 4 states have call predecessors, (145), 2 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2021-11-19 15:55:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 19896 states and 27714 transitions. [2021-11-19 15:55:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2021-11-19 15:55:38,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:38,950 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:55:39,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:39,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:39,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:55:39,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:55:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash -603315963, now seen corresponding path program 1 times [2021-11-19 15:55:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:39,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671915388] [2021-11-19 15:55:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:39,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:39,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:39,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:55:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 5465 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:55:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16178 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15776 trivial. 0 not checked. [2021-11-19 15:55:48,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16178 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 16144 trivial. 0 not checked. [2021-11-19 15:55:51,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:51,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671915388] [2021-11-19 15:55:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671915388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:55:51,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590207165] [2021-11-19 15:55:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:51,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:55:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:55:51,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:55:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:55:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 5465 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:55:55,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16178 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16176 trivial. 0 not checked. [2021-11-19 15:56:01,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16178 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16176 trivial. 0 not checked. [2021-11-19 15:56:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [590207165] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:56:04,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:56:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:56:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476539355] [2021-11-19 15:56:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:56:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:56:04,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:56:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:56:04,683 INFO L87 Difference]: Start difference. First operand 19896 states and 27714 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (74), 3 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-19 15:56:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:05,927 INFO L93 Difference]: Finished difference Result 19902 states and 27719 transitions. [2021-11-19 15:56:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:56:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (74), 3 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 766 [2021-11-19 15:56:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:06,032 INFO L225 Difference]: With dead ends: 19902 [2021-11-19 15:56:06,033 INFO L226 Difference]: Without dead ends: 19900 [2021-11-19 15:56:06,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3063 GetRequests, 3034 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:56:06,045 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5376 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:06,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5376 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:56:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19900 states. [2021-11-19 15:56:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19900 to 19900. [2021-11-19 15:56:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19900 states, 14012 states have (on average 1.2710533828147301) internal successors, (17810), 14199 states have internal predecessors, (17810), 4951 states have call successors, (4951), 935 states have call predecessors, (4951), 934 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:56:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19900 states to 19900 states and 27717 transitions. [2021-11-19 15:56:07,696 INFO L78 Accepts]: Start accepts. Automaton has 19900 states and 27717 transitions. Word has length 766 [2021-11-19 15:56:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:07,698 INFO L470 AbstractCegarLoop]: Abstraction has 19900 states and 27717 transitions. [2021-11-19 15:56:07,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (74), 3 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-19 15:56:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 19900 states and 27717 transitions. [2021-11-19 15:56:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-11-19 15:56:07,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:07,729 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:56:07,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:07,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:08,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:08,153 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:56:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1572755652, now seen corresponding path program 1 times [2021-11-19 15:56:08,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:08,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770429401] [2021-11-19 15:56:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:08,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:08,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:08,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:56:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 5472 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:56:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15782 trivial. 0 not checked. [2021-11-19 15:56:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 16148 trivial. 0 not checked. [2021-11-19 15:56:20,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:20,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770429401] [2021-11-19 15:56:20,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770429401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:20,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778845382] [2021-11-19 15:56:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:20,381 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:56:20,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:56:20,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 15:56:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 5472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:56:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16180 trivial. 0 not checked. [2021-11-19 15:56:30,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16180 trivial. 0 not checked. [2021-11-19 15:56:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778845382] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:56:33,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:56:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:56:33,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433397881] [2021-11-19 15:56:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:56:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:56:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:56:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:56:33,858 INFO L87 Difference]: Start difference. First operand 19900 states and 27717 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (75), 3 states have call predecessors, (75), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 15:56:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:35,303 INFO L93 Difference]: Finished difference Result 19906 states and 27722 transitions. [2021-11-19 15:56:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:56:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (75), 3 states have call predecessors, (75), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 771 [2021-11-19 15:56:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:35,410 INFO L225 Difference]: With dead ends: 19906 [2021-11-19 15:56:35,410 INFO L226 Difference]: Without dead ends: 19904 [2021-11-19 15:56:35,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3083 GetRequests, 3054 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:56:35,422 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5375 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:35,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5375 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:56:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19904 states. [2021-11-19 15:56:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19904 to 19904. [2021-11-19 15:56:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19904 states, 14015 states have (on average 1.270995362112023) internal successors, (17813), 14202 states have internal predecessors, (17813), 4951 states have call successors, (4951), 936 states have call predecessors, (4951), 935 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:56:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19904 states to 19904 states and 27720 transitions. [2021-11-19 15:56:37,120 INFO L78 Accepts]: Start accepts. Automaton has 19904 states and 27720 transitions. Word has length 771 [2021-11-19 15:56:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:37,122 INFO L470 AbstractCegarLoop]: Abstraction has 19904 states and 27720 transitions. [2021-11-19 15:56:37,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (75), 3 states have call predecessors, (75), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 15:56:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19904 states and 27720 transitions. [2021-11-19 15:56:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2021-11-19 15:56:37,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:37,164 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:56:37,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:37,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:37,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:56:37,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:56:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -316721115, now seen corresponding path program 1 times [2021-11-19 15:56:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:37,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379237437] [2021-11-19 15:56:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:37,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:37,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:37,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:56:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 5479 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:56:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16194 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15792 trivial. 0 not checked. [2021-11-19 15:56:46,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16194 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 16156 trivial. 0 not checked. [2021-11-19 15:56:49,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:49,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379237437] [2021-11-19 15:56:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379237437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:56:49,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703600297] [2021-11-19 15:56:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:49,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:56:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:56:49,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:56:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 15:56:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 5479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:56:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16194 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16188 trivial. 0 not checked. [2021-11-19 15:56:59,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:57:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16194 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16188 trivial. 0 not checked. [2021-11-19 15:57:02,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1703600297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:57:02,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:57:02,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:57:02,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861540162] [2021-11-19 15:57:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:57:02,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:57:02,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:57:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:57:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:57:02,318 INFO L87 Difference]: Start difference. First operand 19904 states and 27720 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-19 15:57:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:57:03,997 INFO L93 Difference]: Finished difference Result 19910 states and 27725 transitions. [2021-11-19 15:57:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:57:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 776 [2021-11-19 15:57:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:57:04,091 INFO L225 Difference]: With dead ends: 19910 [2021-11-19 15:57:04,091 INFO L226 Difference]: Without dead ends: 19908 [2021-11-19 15:57:04,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3103 GetRequests, 3074 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:57:04,105 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5374 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:57:04,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5374 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:57:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19908 states. [2021-11-19 15:57:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19908 to 19908. [2021-11-19 15:57:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19908 states, 14018 states have (on average 1.2709373662434014) internal successors, (17816), 14205 states have internal predecessors, (17816), 4951 states have call successors, (4951), 937 states have call predecessors, (4951), 936 states have return successors, (4956), 4914 states have call predecessors, (4956), 4947 states have call successors, (4956) [2021-11-19 15:57:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19908 states to 19908 states and 27723 transitions. [2021-11-19 15:57:05,733 INFO L78 Accepts]: Start accepts. Automaton has 19908 states and 27723 transitions. Word has length 776 [2021-11-19 15:57:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:57:05,734 INFO L470 AbstractCegarLoop]: Abstraction has 19908 states and 27723 transitions. [2021-11-19 15:57:05,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-19 15:57:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 19908 states and 27723 transitions. [2021-11-19 15:57:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2021-11-19 15:57:05,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:57:05,767 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:57:05,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:57:06,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:57:06,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:57:06,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:57:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:57:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1522453119, now seen corresponding path program 1 times [2021-11-19 15:57:06,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:57:06,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950593132] [2021-11-19 15:57:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:57:06,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:57:06,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:57:06,203 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:57:06,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:57:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:57:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 5540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:57:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:57:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16222 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 15999 trivial. 0 not checked. [2021-11-19 15:57:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:57:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16222 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 16209 trivial. 0 not checked. [2021-11-19 15:57:15,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:57:15,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950593132] [2021-11-19 15:57:15,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950593132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:57:15,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:57:15,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:57:15,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173512649] [2021-11-19 15:57:15,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:57:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:57:15,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:57:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:57:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:57:15,546 INFO L87 Difference]: Start difference. First operand 19908 states and 27723 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 3 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2021-11-19 15:57:17,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:57:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:57:30,408 INFO L93 Difference]: Finished difference Result 46331 states and 64484 transitions. [2021-11-19 15:57:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:57:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 3 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) Word has length 795 [2021-11-19 15:57:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:57:30,596 INFO L225 Difference]: With dead ends: 46331 [2021-11-19 15:57:30,597 INFO L226 Difference]: Without dead ends: 33000 [2021-11-19 15:57:30,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1586 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:57:30,650 INFO L933 BasicCegarLoop]: 11658 mSDtfsCounter, 10717 mSDsluCounter, 9679 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10717 SdHoareTripleChecker+Valid, 21337 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:57:30,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10717 Valid, 21337 Invalid, 2080 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 2065 Invalid, 1 Unknown, 0 Unchecked, 12.5s Time] [2021-11-19 15:57:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33000 states. [2021-11-19 15:57:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33000 to 32954. [2021-11-19 15:57:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32954 states, 23226 states have (on average 1.27124773960217) internal successors, (29526), 23531 states have internal predecessors, (29526), 8171 states have call successors, (8171), 1555 states have call predecessors, (8171), 1554 states have return successors, (8182), 8114 states have call predecessors, (8182), 8167 states have call successors, (8182) [2021-11-19 15:57:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32954 states to 32954 states and 45879 transitions. [2021-11-19 15:57:33,456 INFO L78 Accepts]: Start accepts. Automaton has 32954 states and 45879 transitions. Word has length 795 [2021-11-19 15:57:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:57:33,457 INFO L470 AbstractCegarLoop]: Abstraction has 32954 states and 45879 transitions. [2021-11-19 15:57:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 4 states have call successors, (90), 3 states have call predecessors, (90), 3 states have return successors, (88), 4 states have call predecessors, (88), 4 states have call successors, (88) [2021-11-19 15:57:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 32954 states and 45879 transitions. [2021-11-19 15:57:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-11-19 15:57:33,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:57:33,492 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:57:33,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:57:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:57:33,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:57:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:57:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash 672458020, now seen corresponding path program 1 times [2021-11-19 15:57:33,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:57:33,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508943491] [2021-11-19 15:57:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:57:33,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:57:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:57:33,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:57:33,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:57:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:57:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 5486 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:57:39,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:57:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16208 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2021-11-19 15:57:42,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:57:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16208 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 16168 trivial. 0 not checked. [2021-11-19 15:57:45,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:57:45,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508943491] [2021-11-19 15:57:45,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508943491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:57:45,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1480868184] [2021-11-19 15:57:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:57:45,501 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:57:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:57:45,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:57:45,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 15:57:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:57:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 5486 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:57:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:57:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16208 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2021-11-19 15:57:55,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:57:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16208 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2021-11-19 15:57:58,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1480868184] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:57:58,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:57:58,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:57:58,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761801598] [2021-11-19 15:57:58,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:57:58,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:57:58,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:57:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:57:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:57:58,584 INFO L87 Difference]: Start difference. First operand 32954 states and 45879 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (77), 3 states have call predecessors, (77), 1 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2021-11-19 15:58:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:58:00,867 INFO L93 Difference]: Finished difference Result 33212 states and 46125 transitions. [2021-11-19 15:58:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:58:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (77), 3 states have call predecessors, (77), 1 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) Word has length 781 [2021-11-19 15:58:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:58:01,016 INFO L225 Difference]: With dead ends: 33212 [2021-11-19 15:58:01,016 INFO L226 Difference]: Without dead ends: 33210 [2021-11-19 15:58:01,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3123 GetRequests, 3094 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:58:01,037 INFO L933 BasicCegarLoop]: 5550 mSDtfsCounter, 5303 mSDsluCounter, 11183 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5314 SdHoareTripleChecker+Valid, 16733 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:58:01,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5314 Valid, 16733 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:58:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33210 states. [2021-11-19 15:58:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 33208. [2021-11-19 15:58:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 23404 states have (on average 1.2702529482139806) internal successors, (29729), 23714 states have internal predecessors, (29729), 8191 states have call successors, (8191), 1611 states have call predecessors, (8191), 1610 states have return successors, (8202), 8134 states have call predecessors, (8202), 8187 states have call successors, (8202) [2021-11-19 15:58:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 46122 transitions. [2021-11-19 15:58:04,307 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 46122 transitions. Word has length 781 [2021-11-19 15:58:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:58:04,309 INFO L470 AbstractCegarLoop]: Abstraction has 33208 states and 46122 transitions. [2021-11-19 15:58:04,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (77), 3 states have call predecessors, (77), 1 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2021-11-19 15:58:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 46122 transitions. [2021-11-19 15:58:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2021-11-19 15:58:04,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:58:04,342 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:58:04,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:58:04,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:58:04,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:58:04,761 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:58:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:58:04,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1291086011, now seen corresponding path program 1 times [2021-11-19 15:58:04,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:58:04,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349914441] [2021-11-19 15:58:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:58:04,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:58:04,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:58:04,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:58:04,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:58:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:58:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 5493 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:58:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:58:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16226 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15824 trivial. 0 not checked. [2021-11-19 15:58:13,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:58:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16226 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 16184 trivial. 0 not checked. [2021-11-19 15:58:16,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:58:16,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349914441] [2021-11-19 15:58:16,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349914441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:58:16,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340637855] [2021-11-19 15:58:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:58:16,551 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:58:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:58:16,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:58:16,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:58:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:58:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 5493 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:58:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:58:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16226 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16216 trivial. 0 not checked. [2021-11-19 15:58:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:58:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16226 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16216 trivial. 0 not checked. [2021-11-19 15:58:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [340637855] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:58:29,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:58:29,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:58:29,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774422713] [2021-11-19 15:58:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:58:29,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:58:29,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:58:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:58:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:58:29,393 INFO L87 Difference]: Start difference. First operand 33208 states and 46122 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (78), 3 states have call predecessors, (78), 1 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-19 15:58:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:58:31,768 INFO L93 Difference]: Finished difference Result 33214 states and 46127 transitions. [2021-11-19 15:58:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:58:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (78), 3 states have call predecessors, (78), 1 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 786 [2021-11-19 15:58:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:58:31,893 INFO L225 Difference]: With dead ends: 33214 [2021-11-19 15:58:31,893 INFO L226 Difference]: Without dead ends: 33212 [2021-11-19 15:58:31,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3143 GetRequests, 3114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:58:31,910 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5372 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:58:31,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5372 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:58:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33212 states. [2021-11-19 15:58:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33212 to 33212. [2021-11-19 15:58:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33212 states, 23407 states have (on average 1.270218310761738) internal successors, (29732), 23717 states have internal predecessors, (29732), 8191 states have call successors, (8191), 1612 states have call predecessors, (8191), 1611 states have return successors, (8202), 8134 states have call predecessors, (8202), 8187 states have call successors, (8202) [2021-11-19 15:58:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33212 states to 33212 states and 46125 transitions. [2021-11-19 15:58:35,105 INFO L78 Accepts]: Start accepts. Automaton has 33212 states and 46125 transitions. Word has length 786 [2021-11-19 15:58:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:58:35,106 INFO L470 AbstractCegarLoop]: Abstraction has 33212 states and 46125 transitions. [2021-11-19 15:58:35,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (78), 3 states have call predecessors, (78), 1 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-19 15:58:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 33212 states and 46125 transitions. [2021-11-19 15:58:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2021-11-19 15:58:35,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:58:35,136 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:58:35,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:58:35,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 15:58:35,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:58:35,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:58:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:58:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1736232788, now seen corresponding path program 1 times [2021-11-19 15:58:35,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:58:35,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698504042] [2021-11-19 15:58:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:58:35,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:58:35,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:58:35,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:58:35,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:58:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:58:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 5555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:58:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:58:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16263 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 16039 trivial. 0 not checked. [2021-11-19 15:58:43,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:58:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16263 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16245 trivial. 0 not checked. [2021-11-19 15:58:45,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:58:45,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698504042] [2021-11-19 15:58:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698504042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:58:45,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:58:45,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:58:45,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617135670] [2021-11-19 15:58:45,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:58:45,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:58:45,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:58:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:58:45,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:58:45,062 INFO L87 Difference]: Start difference. First operand 33212 states and 46125 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 4 states have call successors, (94), 3 states have call predecessors, (94), 3 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2021-11-19 15:58:47,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:59:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:59:03,872 INFO L93 Difference]: Finished difference Result 66452 states and 92239 transitions. [2021-11-19 15:59:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:59:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 4 states have call successors, (94), 3 states have call predecessors, (94), 3 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 806 [2021-11-19 15:59:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:59:04,156 INFO L225 Difference]: With dead ends: 66452 [2021-11-19 15:59:04,156 INFO L226 Difference]: Without dead ends: 39867 [2021-11-19 15:59:04,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1608 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:59:04,220 INFO L933 BasicCegarLoop]: 11685 mSDtfsCounter, 10758 mSDsluCounter, 8741 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 963 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10758 SdHoareTripleChecker+Valid, 20426 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:59:04,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10758 Valid, 20426 Invalid, 3030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [963 Valid, 2066 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2021-11-19 15:59:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39867 states. [2021-11-19 15:59:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39867 to 39767. [2021-11-19 15:59:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39767 states, 28032 states have (on average 1.2700485159817352) internal successors, (35602), 28402 states have internal predecessors, (35602), 9803 states have call successors, (9803), 1930 states have call predecessors, (9803), 1929 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 15:59:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39767 states to 39767 states and 55222 transitions. [2021-11-19 15:59:07,759 INFO L78 Accepts]: Start accepts. Automaton has 39767 states and 55222 transitions. Word has length 806 [2021-11-19 15:59:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:59:07,760 INFO L470 AbstractCegarLoop]: Abstraction has 39767 states and 55222 transitions. [2021-11-19 15:59:07,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 4 states have call successors, (94), 3 states have call predecessors, (94), 3 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2021-11-19 15:59:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39767 states and 55222 transitions. [2021-11-19 15:59:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2021-11-19 15:59:07,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:59:07,779 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 7, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:59:07,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:59:07,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:59:07,980 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:59:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:59:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1998509692, now seen corresponding path program 1 times [2021-11-19 15:59:07,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:59:07,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451868296] [2021-11-19 15:59:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:59:07,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:59:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:59:07,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:59:07,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:59:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:59:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 5500 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:59:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:59:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16248 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15846 trivial. 0 not checked. [2021-11-19 15:59:17,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:59:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16248 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 16204 trivial. 0 not checked. [2021-11-19 15:59:19,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:59:19,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451868296] [2021-11-19 15:59:19,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451868296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:59:19,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038339863] [2021-11-19 15:59:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:59:19,548 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:59:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:59:19,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:59:19,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:59:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:59:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 5500 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:59:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:59:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16248 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16236 trivial. 0 not checked. [2021-11-19 15:59:28,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:59:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16248 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16236 trivial. 0 not checked. [2021-11-19 15:59:31,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1038339863] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:59:31,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:59:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 15:59:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104185852] [2021-11-19 15:59:31,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:59:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:59:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:59:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:59:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:59:31,908 INFO L87 Difference]: Start difference. First operand 39767 states and 55222 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2021-11-19 15:59:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:59:35,069 INFO L93 Difference]: Finished difference Result 39773 states and 55227 transitions. [2021-11-19 15:59:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:59:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 791 [2021-11-19 15:59:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:59:35,223 INFO L225 Difference]: With dead ends: 39773 [2021-11-19 15:59:35,223 INFO L226 Difference]: Without dead ends: 39771 [2021-11-19 15:59:35,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3163 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 15:59:35,243 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5371 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:59:35,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5371 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:59:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39771 states. [2021-11-19 15:59:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39771 to 39771. [2021-11-19 15:59:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39771 states, 28035 states have (on average 1.2700196183342252) internal successors, (35605), 28405 states have internal predecessors, (35605), 9803 states have call successors, (9803), 1931 states have call predecessors, (9803), 1930 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 15:59:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39771 states to 39771 states and 55225 transitions. [2021-11-19 15:59:38,449 INFO L78 Accepts]: Start accepts. Automaton has 39771 states and 55225 transitions. Word has length 791 [2021-11-19 15:59:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:59:38,450 INFO L470 AbstractCegarLoop]: Abstraction has 39771 states and 55225 transitions. [2021-11-19 15:59:38,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (79), 3 states have call predecessors, (79), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2021-11-19 15:59:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39771 states and 55225 transitions. [2021-11-19 15:59:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2021-11-19 15:59:38,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:59:38,477 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 8, 7, 7, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:59:38,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:59:38,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:59:38,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:59:38,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 15:59:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:59:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1621803419, now seen corresponding path program 1 times [2021-11-19 15:59:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:59:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023370689] [2021-11-19 15:59:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:59:38,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:59:38,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:59:38,903 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:59:38,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:59:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:59:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 5507 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 15:59:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:59:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15872 trivial. 0 not checked. [2021-11-19 15:59:47,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:59:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 16228 trivial. 0 not checked. [2021-11-19 15:59:50,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:59:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023370689] [2021-11-19 15:59:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023370689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:59:50,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [128660183] [2021-11-19 15:59:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:59:50,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:59:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:59:50,942 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:59:50,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 15:59:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:59:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 5507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:59:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16260 trivial. 0 not checked. [2021-11-19 16:00:00,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16274 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16260 trivial. 0 not checked. [2021-11-19 16:00:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [128660183] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:00:04,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 16:00:04,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 16:00:04,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723404810] [2021-11-19 16:00:04,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:00:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:00:04,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:00:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:00:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 16:00:04,020 INFO L87 Difference]: Start difference. First operand 39771 states and 55225 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (80), 3 states have call predecessors, (80), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-19 16:00:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:00:07,338 INFO L93 Difference]: Finished difference Result 39777 states and 55230 transitions. [2021-11-19 16:00:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 16:00:07,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (80), 3 states have call predecessors, (80), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) Word has length 796 [2021-11-19 16:00:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:00:07,466 INFO L225 Difference]: With dead ends: 39777 [2021-11-19 16:00:07,466 INFO L226 Difference]: Without dead ends: 39775 [2021-11-19 16:00:07,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3183 GetRequests, 3154 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 16:00:07,480 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5370 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 16:00:07,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5370 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 16:00:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39775 states. [2021-11-19 16:00:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39775 to 39775. [2021-11-19 16:00:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39775 states, 28038 states have (on average 1.2699907268706756) internal successors, (35608), 28408 states have internal predecessors, (35608), 9803 states have call successors, (9803), 1932 states have call predecessors, (9803), 1931 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 16:00:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39775 states to 39775 states and 55228 transitions. [2021-11-19 16:00:11,304 INFO L78 Accepts]: Start accepts. Automaton has 39775 states and 55228 transitions. Word has length 796 [2021-11-19 16:00:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:00:11,305 INFO L470 AbstractCegarLoop]: Abstraction has 39775 states and 55228 transitions. [2021-11-19 16:00:11,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (80), 3 states have call predecessors, (80), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-19 16:00:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 39775 states and 55228 transitions. [2021-11-19 16:00:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-19 16:00:11,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:00:11,336 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 9, 8, 8, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:00:11,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:11,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:11,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 16:00:11,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 16:00:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:00:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash 308094436, now seen corresponding path program 1 times [2021-11-19 16:00:11,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:00:11,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845464000] [2021-11-19 16:00:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:00:11,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:00:11,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:00:11,756 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:00:11,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 16:00:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 5514 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 16:00:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16304 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15902 trivial. 0 not checked. [2021-11-19 16:00:20,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16304 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 16256 trivial. 0 not checked. [2021-11-19 16:00:23,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:00:23,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845464000] [2021-11-19 16:00:23,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845464000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:00:23,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590446020] [2021-11-19 16:00:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:00:23,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:00:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:00:23,562 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:00:23,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 16:00:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 5514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 16:00:26,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16304 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16288 trivial. 0 not checked. [2021-11-19 16:00:33,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16304 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16288 trivial. 0 not checked. [2021-11-19 16:00:36,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [590446020] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:00:36,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 16:00:36,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 16:00:36,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868897837] [2021-11-19 16:00:36,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:00:36,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:00:36,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:00:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:00:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 16:00:36,803 INFO L87 Difference]: Start difference. First operand 39775 states and 55228 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (81), 3 states have call predecessors, (81), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-19 16:00:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:00:40,106 INFO L93 Difference]: Finished difference Result 39781 states and 55233 transitions. [2021-11-19 16:00:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 16:00:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (81), 3 states have call predecessors, (81), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 801 [2021-11-19 16:00:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:00:40,234 INFO L225 Difference]: With dead ends: 39781 [2021-11-19 16:00:40,234 INFO L226 Difference]: Without dead ends: 39779 [2021-11-19 16:00:40,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3203 GetRequests, 3174 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 16:00:40,251 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5369 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 16:00:40,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5369 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 16:00:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-11-19 16:00:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 39779. [2021-11-19 16:00:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39779 states, 28041 states have (on average 1.2699618415891016) internal successors, (35611), 28411 states have internal predecessors, (35611), 9803 states have call successors, (9803), 1933 states have call predecessors, (9803), 1932 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 16:00:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39779 states to 39779 states and 55231 transitions. [2021-11-19 16:00:44,240 INFO L78 Accepts]: Start accepts. Automaton has 39779 states and 55231 transitions. Word has length 801 [2021-11-19 16:00:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:00:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 39779 states and 55231 transitions. [2021-11-19 16:00:44,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (81), 3 states have call predecessors, (81), 1 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-19 16:00:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 39779 states and 55231 transitions. [2021-11-19 16:00:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2021-11-19 16:00:44,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:00:44,264 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 10, 9, 9, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:00:44,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:44,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 16:00:44,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 16:00:44,666 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 16:00:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:00:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1946299781, now seen corresponding path program 1 times [2021-11-19 16:00:44,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:00:44,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953946543] [2021-11-19 16:00:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:00:44,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:00:44,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:00:44,673 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:00:44,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 16:00:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:00:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 5521 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 16:00:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:00:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16338 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15936 trivial. 0 not checked. [2021-11-19 16:00:53,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:00:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16338 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 16288 trivial. 0 not checked. [2021-11-19 16:00:56,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:00:56,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953946543] [2021-11-19 16:00:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953946543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:00:56,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331469869] [2021-11-19 16:00:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:00:56,420 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:00:56,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:00:56,430 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:00:56,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 16:00:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:01:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 5521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 16:01:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:01:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16338 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16320 trivial. 0 not checked. [2021-11-19 16:01:06,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:01:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16338 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16320 trivial. 0 not checked. [2021-11-19 16:01:09,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331469869] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:01:09,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 16:01:09,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 16:01:09,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226842372] [2021-11-19 16:01:09,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:01:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:01:09,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:01:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:01:09,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 16:01:09,681 INFO L87 Difference]: Start difference. First operand 39779 states and 55231 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-19 16:01:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:01:13,310 INFO L93 Difference]: Finished difference Result 39785 states and 55236 transitions. [2021-11-19 16:01:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 16:01:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 806 [2021-11-19 16:01:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:01:13,442 INFO L225 Difference]: With dead ends: 39785 [2021-11-19 16:01:13,442 INFO L226 Difference]: Without dead ends: 39783 [2021-11-19 16:01:13,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3223 GetRequests, 3194 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 16:01:13,459 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5368 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 16:01:13,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5368 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 16:01:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-11-19 16:01:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 39783. [2021-11-19 16:01:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39783 states, 28044 states have (on average 1.2699329624875195) internal successors, (35614), 28414 states have internal predecessors, (35614), 9803 states have call successors, (9803), 1934 states have call predecessors, (9803), 1933 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 16:01:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39783 states to 39783 states and 55234 transitions. [2021-11-19 16:01:17,569 INFO L78 Accepts]: Start accepts. Automaton has 39783 states and 55234 transitions. Word has length 806 [2021-11-19 16:01:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:01:17,570 INFO L470 AbstractCegarLoop]: Abstraction has 39783 states and 55234 transitions. [2021-11-19 16:01:17,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (82), 3 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-19 16:01:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 39783 states and 55234 transitions. [2021-11-19 16:01:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-11-19 16:01:17,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:01:17,596 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 11, 10, 10, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:01:17,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 16:01:17,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 16:01:18,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 16:01:18,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 16:01:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:01:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1447221828, now seen corresponding path program 1 times [2021-11-19 16:01:18,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:01:18,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695453613] [2021-11-19 16:01:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:01:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:01:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:01:18,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:01:18,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 16:01:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:01:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 5528 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 16:01:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:01:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 15974 trivial. 0 not checked. [2021-11-19 16:01:27,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:01:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 16324 trivial. 0 not checked. [2021-11-19 16:01:29,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:01:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695453613] [2021-11-19 16:01:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695453613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:01:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974092765] [2021-11-19 16:01:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:01:29,990 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:01:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:01:29,990 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:01:29,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 16:01:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:01:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 5528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 16:01:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:01:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16356 trivial. 0 not checked. [2021-11-19 16:01:39,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:01:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16376 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16356 trivial. 0 not checked. [2021-11-19 16:01:42,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [974092765] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:01:42,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 16:01:42,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 16:01:42,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324868091] [2021-11-19 16:01:42,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:01:42,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:01:42,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:01:42,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:01:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 16:01:42,532 INFO L87 Difference]: Start difference. First operand 39783 states and 55234 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (83), 3 states have call predecessors, (83), 1 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-19 16:01:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:01:45,755 INFO L93 Difference]: Finished difference Result 39789 states and 55239 transitions. [2021-11-19 16:01:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 16:01:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (83), 3 states have call predecessors, (83), 1 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 811 [2021-11-19 16:01:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:01:45,884 INFO L225 Difference]: With dead ends: 39789 [2021-11-19 16:01:45,884 INFO L226 Difference]: Without dead ends: 39787 [2021-11-19 16:01:45,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3243 GetRequests, 3214 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 16:01:45,901 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5367 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 16:01:45,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5367 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 16:01:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39787 states. [2021-11-19 16:01:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39787 to 39787. [2021-11-19 16:01:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39787 states, 28047 states have (on average 1.2699040895639462) internal successors, (35617), 28417 states have internal predecessors, (35617), 9803 states have call successors, (9803), 1935 states have call predecessors, (9803), 1934 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 16:01:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39787 states to 39787 states and 55237 transitions. [2021-11-19 16:01:50,656 INFO L78 Accepts]: Start accepts. Automaton has 39787 states and 55237 transitions. Word has length 811 [2021-11-19 16:01:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:01:50,657 INFO L470 AbstractCegarLoop]: Abstraction has 39787 states and 55237 transitions. [2021-11-19 16:01:50,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (83), 3 states have call predecessors, (83), 1 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-19 16:01:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 39787 states and 55237 transitions. [2021-11-19 16:01:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2021-11-19 16:01:50,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:01:50,683 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 59, 59, 59, 59, 59, 59, 12, 11, 11, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:01:50,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 16:01:50,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 16:01:51,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 16:01:51,084 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 16:01:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:01:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1550293851, now seen corresponding path program 1 times [2021-11-19 16:01:51,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:01:51,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96179099] [2021-11-19 16:01:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:01:51,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:01:51,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:01:51,090 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:01:51,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 16:01:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:01:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 5535 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 16:01:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:01:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16418 backedges. 396 proven. 6 refuted. 0 times theorem prover too weak. 16016 trivial. 0 not checked. [2021-11-19 16:01:59,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:02:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16418 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 16364 trivial. 0 not checked. [2021-11-19 16:02:02,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:02:02,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96179099] [2021-11-19 16:02:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96179099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 16:02:02,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1041662216] [2021-11-19 16:02:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:02:02,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 16:02:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 16:02:02,061 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 16:02:02,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 16:02:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:02:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 5535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 16:02:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:02:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16418 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16396 trivial. 0 not checked. [2021-11-19 16:02:11,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:02:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16418 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16396 trivial. 0 not checked. [2021-11-19 16:02:14,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1041662216] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:02:14,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 16:02:14,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18, 18, 4] total 28 [2021-11-19 16:02:14,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356470118] [2021-11-19 16:02:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:02:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:02:14,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:02:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:02:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-19 16:02:14,483 INFO L87 Difference]: Start difference. First operand 39787 states and 55237 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (84), 3 states have call predecessors, (84), 1 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2021-11-19 16:02:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 16:02:17,803 INFO L93 Difference]: Finished difference Result 39793 states and 55242 transitions. [2021-11-19 16:02:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 16:02:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (84), 3 states have call predecessors, (84), 1 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) Word has length 816 [2021-11-19 16:02:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 16:02:17,934 INFO L225 Difference]: With dead ends: 39793 [2021-11-19 16:02:17,934 INFO L226 Difference]: Without dead ends: 39791 [2021-11-19 16:02:17,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3263 GetRequests, 3234 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-11-19 16:02:17,950 INFO L933 BasicCegarLoop]: 5541 mSDtfsCounter, 5362 mSDsluCounter, 11059 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5366 SdHoareTripleChecker+Valid, 16600 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 16:02:17,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5366 Valid, 16600 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 16:02:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39791 states. [2021-11-19 16:02:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39791 to 39791. [2021-11-19 16:02:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39791 states, 28050 states have (on average 1.2698752228163992) internal successors, (35620), 28420 states have internal predecessors, (35620), 9803 states have call successors, (9803), 1936 states have call predecessors, (9803), 1935 states have return successors, (9817), 9736 states have call predecessors, (9817), 9799 states have call successors, (9817) [2021-11-19 16:02:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39791 states to 39791 states and 55240 transitions. [2021-11-19 16:02:21,798 INFO L78 Accepts]: Start accepts. Automaton has 39791 states and 55240 transitions. Word has length 816 [2021-11-19 16:02:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 16:02:21,800 INFO L470 AbstractCegarLoop]: Abstraction has 39791 states and 55240 transitions. [2021-11-19 16:02:21,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (84), 3 states have call predecessors, (84), 1 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2021-11-19 16:02:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 39791 states and 55240 transitions. [2021-11-19 16:02:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2021-11-19 16:02:21,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 16:02:21,841 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 59, 59, 59, 59, 59, 59, 13, 12, 12, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 16:02:21,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 16:02:22,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-19 16:02:22,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 16:02:22,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock_tryErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-19 16:02:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 16:02:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1561385533, now seen corresponding path program 1 times [2021-11-19 16:02:22,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 16:02:22,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341458271] [2021-11-19 16:02:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 16:02:22,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 16:02:22,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 16:02:22,264 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 16:02:22,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c83c3d3-fba7-473f-8b3f-c8940d51d2fb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 16:02:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 16:02:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 5634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 16:02:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 16:02:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16901 backedges. 814 proven. 0 refuted. 0 times theorem prover too weak. 16087 trivial. 0 not checked. [2021-11-19 16:02:30,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 16:02:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16901 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 16843 trivial. 0 not checked. [2021-11-19 16:02:32,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 16:02:32,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341458271] [2021-11-19 16:02:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341458271] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 16:02:32,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 16:02:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-19 16:02:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940082759] [2021-11-19 16:02:32,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 16:02:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 16:02:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 16:02:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 16:02:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 16:02:32,017 INFO L87 Difference]: Start difference. First operand 39791 states and 55240 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (91), 3 states have call predecessors, (91), 4 states have return successors, (89), 3 states have call predecessors, (89), 3 states have call successors, (89) [2021-11-19 16:02:34,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []