./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF --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 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:29,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:29,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:29,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:29,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:29,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:29,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:29,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:29,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:29,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:29,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:29,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:29,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:29,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:29,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:29,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:29,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:29,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:29,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:29,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:29,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:29,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:29,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:29,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:29,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:29,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:29,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:29,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:29,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:29,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:29,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:29,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:29,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:29,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:29,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:29,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:29,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:29,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:29,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:29,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:29,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:29,950 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:27:29,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:29,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:29,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:29,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:29,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:29,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:29,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:29,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:27:29,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:29,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:29,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:27:29,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:27:29,983 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:29,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:27:29,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:27:29,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:27:29,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:29,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:27:29,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:29,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:29,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:29,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:29,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:29,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:29,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:29,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:29,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:29,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:29,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:29,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:29,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:29,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:29,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:27:29,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:27:29,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:29,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:29,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:29,990 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd [2021-11-13 01:27:30,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:30,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:30,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:30,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:30,318 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:30,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-13 01:27:30,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/27b2895a8/699236ce72e847b29feeaa64fae8de07/FLAG320c242a7 [2021-11-13 01:27:31,581 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:31,582 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-13 01:27:31,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/27b2895a8/699236ce72e847b29feeaa64fae8de07/FLAG320c242a7 [2021-11-13 01:27:31,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/27b2895a8/699236ce72e847b29feeaa64fae8de07 [2021-11-13 01:27:31,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:31,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:31,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:31,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:31,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:31,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a07f15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:31, skipping insertion in model container [2021-11-13 01:27:31,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:32,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:34,542 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 01:27:34,566 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 01:27:34,569 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 01:27:35,948 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-13 01:27:35,951 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-13 01:27:35,952 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-13 01:27:35,953 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-13 01:27:35,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:36,061 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) [2021-11-13 01:27:36,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@798c31dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:36, skipping insertion in model container [2021-11-13 01:27:36,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:36,063 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:27:36,066 INFO L158 Benchmark]: Toolchain (without parser) took 4221.20ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 82.2MB in the beginning and 82.5MB in the end (delta: -209.1kB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2021-11-13 01:27:36,067 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 113.2MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:36,069 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4217.54ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 82.2MB in the beginning and 82.5MB in the end (delta: -285.9kB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2021-11-13 01:27:36,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 113.2MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4217.54ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 82.2MB in the beginning and 82.5MB in the end (delta: -285.9kB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6411]: 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF --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 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:38,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:38,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:38,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:38,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:38,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:38,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:38,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:38,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:38,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:38,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:38,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:38,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:38,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:38,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:38,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:38,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:38,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:38,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:38,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:38,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:38,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:38,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:38,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:38,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:38,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:38,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:38,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:38,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:38,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:38,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:38,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:38,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:38,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:38,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:38,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:38,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:38,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:38,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:38,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:38,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:38,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:27:38,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:38,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:38,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:38,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:38,919 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:38,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:38,920 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:38,920 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:38,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:38,920 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:38,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:38,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:38,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:38,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:38,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:38,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:38,925 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:27:38,925 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:27:38,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:38,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:38,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:38,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:38,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:27:38,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:38,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:38,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:38,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:38,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:38,928 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:27:38,928 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:27:38,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:38,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:38,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:38,929 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd [2021-11-13 01:27:39,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:39,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:39,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:39,433 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:39,434 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:39,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-13 01:27:39,525 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/6ca78ab59/7f6431fb253b447991fcf09afb09260a/FLAGd58d89adb [2021-11-13 01:27:40,863 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:40,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-13 01:27:40,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/6ca78ab59/7f6431fb253b447991fcf09afb09260a/FLAGd58d89adb [2021-11-13 01:27:41,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/data/6ca78ab59/7f6431fb253b447991fcf09afb09260a [2021-11-13 01:27:41,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:41,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:41,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:41,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:41,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:41,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:41" (1/1) ... [2021-11-13 01:27:41,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db8db0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:41, skipping insertion in model container [2021-11-13 01:27:41,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:41" (1/1) ... [2021-11-13 01:27:41,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:41,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:45,165 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-13 01:27:45,169 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-13 01:27:45,169 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-13 01:27:45,170 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-13 01:27:45,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:45,327 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:27:45,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:46,066 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-13 01:27:46,073 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-13 01:27:46,074 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-13 01:27:46,075 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-13 01:27:46,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:46,119 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:27:46,628 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-13 01:27:46,628 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-13 01:27:46,629 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-13 01:27:46,630 WARN L228 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_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-13 01:27:46,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:46,923 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:27:46,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46 WrapperNode [2021-11-13 01:27:46,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:46,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:46,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:27:46,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:27:46,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:47,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:27:47,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:27:47,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:27:47,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:27:47,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:27:47,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:27:47,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:27:47,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (1/1) ... [2021-11-13 01:27:47,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:47,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:27:47,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:27:48,020 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_resume [2021-11-13 01:27:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_resume [2021-11-13 01:27:48,021 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-13 01:27:48,021 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-13 01:27:48,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 01:27:48,022 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 01:27:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-13 01:27:48,022 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-13 01:27:48,022 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_write_reg [2021-11-13 01:27:48,022 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_write_reg [2021-11-13 01:27:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 01:27:48,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 01:27:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2021-11-13 01:27:48,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2021-11-13 01:27:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read8 [2021-11-13 01:27:48,024 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read8 [2021-11-13 01:27:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-13 01:27:48,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-13 01:27:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-13 01:27:48,024 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-13 01:27:48,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-13 01:27:48,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-13 01:27:48,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-13 01:27:48,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-13 01:27:48,026 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_read_and_clear_stats [2021-11-13 01:27:48,026 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_read_and_clear_stats [2021-11-13 01:27:48,026 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_sync [2021-11-13 01:27:48,027 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_sync [2021-11-13 01:27:48,027 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-13 01:27:48,027 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-13 01:27:48,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-13 01:27:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-13 01:27:48,028 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-13 01:27:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-13 01:27:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 01:27:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 01:27:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-13 01:27:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-13 01:27:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:27:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 01:27:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:27:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 01:27:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 01:27:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-13 01:27:48,033 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-13 01:27:48,033 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_lists [2021-11-13 01:27:48,033 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_lists [2021-11-13 01:27:48,033 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_close [2021-11-13 01:27:48,033 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_close [2021-11-13 01:27:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_65 [2021-11-13 01:27:48,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_65 [2021-11-13 01:27:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-13 01:27:48,034 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-13 01:27:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_print [2021-11-13 01:27:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_print [2021-11-13 01:27:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-13 01:27:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-13 01:27:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-13 01:27:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-13 01:27:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pci_unregister_driver [2021-11-13 01:27:48,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pci_unregister_driver [2021-11-13 01:27:48,037 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_probe1 [2021-11-13 01:27:48,038 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_probe1 [2021-11-13 01:27:48,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-13 01:27:48,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-13 01:27:48,038 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-13 01:27:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-13 01:27:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-13 01:27:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-13 01:27:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-13 01:27:48,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-13 01:27:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-13 01:27:48,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-13 01:27:48,040 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_timer [2021-11-13 01:27:48,040 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_timer [2021-11-13 01:27:48,041 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_timer [2021-11-13 01:27:48,042 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_timer [2021-11-13 01:27:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2021-11-13 01:27:48,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2021-11-13 01:27:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_stop [2021-11-13 01:27:48,043 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_stop [2021-11-13 01:27:48,043 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-13 01:27:48,044 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-13 01:27:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-13 01:27:48,044 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-13 01:27:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_remove_one [2021-11-13 01:27:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_remove_one [2021-11-13 01:27:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_get_skb [2021-11-13 01:27:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_get_skb [2021-11-13 01:27:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_byte [2021-11-13 01:27:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_byte [2021-11-13 01:27:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-13 01:27:48,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-13 01:27:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:27:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2021-11-13 01:27:48,046 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2021-11-13 01:27:48,047 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_poll [2021-11-13 01:27:48,047 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_poll [2021-11-13 01:27:48,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-13 01:27:48,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-13 01:27:48,048 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 01:27:48,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 01:27:48,048 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-13 01:27:48,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-13 01:27:48,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:27:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 01:27:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 01:27:48,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 01:27:48,054 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_free_lists [2021-11-13 01:27:48,055 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_free_lists [2021-11-13 01:27:48,055 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-13 01:27:48,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-13 01:27:48,056 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 01:27:48,057 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 01:27:48,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-13 01:27:48,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-13 01:27:48,064 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2021-11-13 01:27:48,064 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2021-11-13 01:27:48,064 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_store_skb [2021-11-13 01:27:48,064 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_store_skb [2021-11-13 01:27:48,065 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_tx_timeout [2021-11-13 01:27:48,065 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_tx_timeout [2021-11-13 01:27:48,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:27:48,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:27:48,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:27:48,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 01:27:48,066 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unregister_driver [2021-11-13 01:27:48,066 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unregister_driver [2021-11-13 01:27:48,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:27:48,067 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_up [2021-11-13 01:27:48,067 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_up [2021-11-13 01:27:48,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 01:27:48,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 01:27:48,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 01:27:48,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-13 01:27:48,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-13 01:27:48,068 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-13 01:27:48,068 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-13 01:27:48,068 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2021-11-13 01:27:48,068 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2021-11-13 01:27:48,069 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_handle_interrupt [2021-11-13 01:27:48,069 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_handle_interrupt [2021-11-13 01:27:48,069 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_start [2021-11-13 01:27:48,069 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_start [2021-11-13 01:27:48,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-13 01:27:48,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-13 01:27:48,070 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_finish_auto_neg [2021-11-13 01:27:48,070 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_finish_auto_neg [2021-11-13 01:27:48,070 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-13 01:27:48,070 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-13 01:27:48,070 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-13 01:27:48,071 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-13 01:27:48,071 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2021-11-13 01:27:48,071 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2021-11-13 01:27:48,071 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_start_link [2021-11-13 01:27:48,071 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_start_link [2021-11-13 01:27:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:27:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_multicast_list [2021-11-13 01:27:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_multicast_list [2021-11-13 01:27:48,072 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-13 01:27:48,072 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-13 01:27:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:27:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-13 01:27:48,073 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-13 01:27:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2021-11-13 01:27:48,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2021-11-13 01:27:48,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 01:27:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 01:27:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 01:27:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:27:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:27:48,074 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_print_list [2021-11-13 01:27:48,075 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_print_list [2021-11-13 01:27:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write16 [2021-11-13 01:27:48,075 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write16 [2021-11-13 01:27:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-13 01:27:48,075 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-13 01:27:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-13 01:27:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-13 01:27:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-13 01:27:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-13 01:27:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-13 01:27:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-13 01:27:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-13 01:27:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-13 01:27:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_finish_reset [2021-11-13 01:27:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_finish_reset [2021-11-13 01:27:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write32 [2021-11-13 01:27:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write32 [2021-11-13 01:27:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-13 01:27:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-13 01:27:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-13 01:27:48,078 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-13 01:27:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_mac [2021-11-13 01:27:48,079 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_mac [2021-11-13 01:27:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-13 01:27:48,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-13 01:27:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_start [2021-11-13 01:27:48,079 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_start [2021-11-13 01:27:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read32 [2021-11-13 01:27:48,080 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read32 [2021-11-13 01:27:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write8 [2021-11-13 01:27:48,080 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write8 [2021-11-13 01:27:48,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 01:27:48,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 01:27:48,081 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_down [2021-11-13 01:27:48,081 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_down [2021-11-13 01:27:48,081 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-13 01:27:48,081 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-13 01:27:48,081 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_adapter [2021-11-13 01:27:48,082 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_adapter [2021-11-13 01:27:48,082 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_send_data [2021-11-13 01:27:48,082 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_send_data [2021-11-13 01:27:48,082 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_reset [2021-11-13 01:27:48,082 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_reset [2021-11-13 01:27:48,082 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_read_reg [2021-11-13 01:27:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_read_reg [2021-11-13 01:27:48,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-13 01:27:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-13 01:27:48,083 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_open [2021-11-13 01:27:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_open [2021-11-13 01:27:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-13 01:27:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-13 01:27:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-13 01:27:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-13 01:27:48,084 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-13 01:27:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-13 01:27:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-13 01:27:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-13 01:27:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-13 01:27:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-13 01:27:48,087 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-13 01:27:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-13 01:27:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-13 01:27:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-13 01:27:48,092 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-13 01:27:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-13 01:27:48,092 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-13 01:28:01,439 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 01:28:35,094 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume 0bv64 == ~bvadd64(tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset); [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume !(0bv64 == ~bvadd64(tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset)); [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume ~bvsle64(tlan_eisa_probe_~ioaddr~0#1, 36863bv64); [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume !~bvsle64(tlan_eisa_probe_~ioaddr~0#1, 36863bv64); [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976-2: SUMMARY for call tlan_eisa_probe_#t~ret386#1 := inb(~bvadd32(3264bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet384#1; [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume !(16bv32 == ~debug~0); [2021-11-13 01:28:35,095 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume 0bv32 != ~bvand32(16bv32, ~debug~0); [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947-1: tlan_eisa_probe_~tmp___2~2#1 := tlan_eisa_probe_#t~ret381#1;havoc tlan_eisa_probe_#t~ret381#1; [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947: SUMMARY for call tlan_eisa_probe_#t~ret381#1 := inw(~bvadd32(3200bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7014: SUMMARY for call tlan_eisa_probe_#t~ret387#1 := tlan_probe1(0bv64, 0bv64, tlan_eisa_probe_~ioaddr~0#1, tlan_eisa_probe_~irq~0#1, 12bv32, 0bv64, 0bv64); srcloc: null [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume 4366bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~tmp___2~2#1); [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume !(4366bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~tmp___2~2#1)); [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6983: tlan_eisa_probe_~tmp___4~0#1 := tlan_eisa_probe_#t~ret386#1;havoc tlan_eisa_probe_#t~ret386#1; [2021-11-13 01:28:35,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6951: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume 0bv32 != ~bvand32(16bv32, ~debug~0); [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume 16bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume !(16bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920-1: tlan_eisa_probe_~tmp~35#1 := tlan_eisa_probe_#t~ret372#1;havoc tlan_eisa_probe_#t~ret372#1;havoc tlan_eisa_probe_#t~nondet373#1; [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920: SUMMARY for call tlan_eisa_probe_#t~ret372#1 := inw(~bvadd32(3200bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6987: tlan_eisa_probe_~irq~0#1 := 5bv32; [2021-11-13 01:28:35,097 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7021: tlan_eisa_probe_~rc~2#1 := tlan_eisa_probe_#t~ret387#1;havoc tlan_eisa_probe_#t~ret387#1; [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume 32bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume !(32bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957-1: tlan_eisa_probe_~device_id~1#1 := tlan_eisa_probe_#t~ret382#1;havoc tlan_eisa_probe_#t~ret382#1; [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957: SUMMARY for call tlan_eisa_probe_#t~ret382#1 := inw(~bvadd32(3202bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6991: tlan_eisa_probe_~irq~0#1 := 9bv32; [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume 0bv32 != ~bvand32(16bv32, ~debug~0);havoc tlan_eisa_probe_#t~nondet378#1; [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-13 01:28:35,098 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume 8433bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1) && 16625bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1); [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume !(8433bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1) && 16625bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1)); [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927-1: tlan_eisa_probe_~tmp___0~12#1 := tlan_eisa_probe_#t~ret375#1;havoc tlan_eisa_probe_#t~ret375#1;havoc tlan_eisa_probe_#t~nondet376#1; [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927: SUMMARY for call tlan_eisa_probe_#t~ret375#1 := inw(~bvadd32(3202bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume 64bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume !(64bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6961: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6995: tlan_eisa_probe_~irq~0#1 := 10bv32; [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume 128bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-13 01:28:35,099 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume !(128bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6932-1: call tlan_eisa_probe_#t~ret380#1.base, tlan_eisa_probe_#t~ret380#1.offset := __request_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64, ~#tlan_signature~0.base, ~#tlan_signature~0.offset, 0bv32);tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset := tlan_eisa_probe_#t~ret380#1.base, tlan_eisa_probe_#t~ret380#1.offset;havoc tlan_eisa_probe_#t~ret380#1.base, tlan_eisa_probe_#t~ret380#1.offset; [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6999: tlan_eisa_probe_~irq~0#1 := 11bv32; [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967-1: tlan_eisa_probe_~tmp___3~1#1 := tlan_eisa_probe_#t~ret383#1;havoc tlan_eisa_probe_#t~ret383#1; [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967: SUMMARY for call tlan_eisa_probe_#t~ret383#1 := inb(~bvadd32(3204bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7033-1: tlan_eisa_probe_~ioaddr~0#1 := ~bvadd64(4096bv64, tlan_eisa_probe_~ioaddr~0#1); [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet388#1; [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume !(16bv32 == ~debug~0); [2021-11-13 01:28:35,100 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume 1bv32 != ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___3~1#1); [2021-11-13 01:28:35,101 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume !(1bv32 != ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___3~1#1)); [2021-11-13 01:28:35,101 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet390#1; [2021-11-13 01:28:35,101 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume !(16bv32 == ~debug~0); [2021-11-13 01:28:35,105 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-13 01:28:35,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:28:35,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:28:35,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:28:35 BoogieIcfgContainer [2021-11-13 01:28:35,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:28:35,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:28:35,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:28:35,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:28:35,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:27:41" (1/3) ... [2021-11-13 01:28:35,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d5e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:28:35, skipping insertion in model container [2021-11-13 01:28:35,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:46" (2/3) ... [2021-11-13 01:28:35,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d5e82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:28:35, skipping insertion in model container [2021-11-13 01:28:35,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:28:35" (3/3) ... [2021-11-13 01:28:35,275 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-13 01:28:35,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:28:35,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-13 01:28:35,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:28:35,393 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 [2021-11-13 01:28:35,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-13 01:28:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 1990 states, 1278 states have (on average 1.2519561815336464) internal successors, (1600), 1334 states have internal predecessors, (1600), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) [2021-11-13 01:28:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 01:28:35,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:35,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-13 01:28:35,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:28:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1354900798, now seen corresponding path program 1 times [2021-11-13 01:28:35,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:35,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060711127] [2021-11-13 01:28:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:35,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:35,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:35,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:28:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:38,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:39,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:39,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060711127] [2021-11-13 01:28:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060711127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:39,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:39,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 01:28:39,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107699700] [2021-11-13 01:28:39,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:39,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:28:39,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:28:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:39,242 INFO L87 Difference]: Start difference. First operand has 1990 states, 1278 states have (on average 1.2519561815336464) internal successors, (1600), 1334 states have internal predecessors, (1600), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:28:41,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:28:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:46,762 INFO L93 Difference]: Finished difference Result 6718 states and 9818 transitions. [2021-11-13 01:28:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:28:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 52 [2021-11-13 01:28:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:46,829 INFO L225 Difference]: With dead ends: 6718 [2021-11-13 01:28:46,829 INFO L226 Difference]: Without dead ends: 4715 [2021-11-13 01:28:46,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:46,877 INFO L933 BasicCegarLoop]: 4234 mSDtfsCounter, 3814 mSDsluCounter, 6070 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6429.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3814 SdHoareTripleChecker+Valid, 10304 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 77.03ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6857.62ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:46,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3814 Valid, 10304 Invalid, 856 Unknown, 0 Unchecked, 77.03ms Time], IncrementalHoareTripleChecker [33 Valid, 822 Invalid, 1 Unknown, 0 Unchecked, 6857.62ms Time] [2021-11-13 01:28:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-13 01:28:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4646. [2021-11-13 01:28:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 2973 states have (on average 1.229061553985873) internal successors, (3654), 3100 states have internal predecessors, (3654), 1393 states have call successors, (1393), 278 states have call predecessors, (1393), 277 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:28:47,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6446 transitions. [2021-11-13 01:28:47,353 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6446 transitions. Word has length 52 [2021-11-13 01:28:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:47,354 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 6446 transitions. [2021-11-13 01:28:47,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:28:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6446 transitions. [2021-11-13 01:28:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 01:28:47,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:47,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-13 01:28:47,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:47,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:47,581 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:28:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1370419516, now seen corresponding path program 1 times [2021-11-13 01:28:47,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:47,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488505092] [2021-11-13 01:28:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:47,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:47,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:47,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:28:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:51,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:51,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488505092] [2021-11-13 01:28:51,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488505092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:51,510 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:51,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:28:51,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735635751] [2021-11-13 01:28:51,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:51,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:51,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:51,514 INFO L87 Difference]: Start difference. First operand 4646 states and 6446 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:28:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:52,063 INFO L93 Difference]: Finished difference Result 4652 states and 6451 transitions. [2021-11-13 01:28:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 52 [2021-11-13 01:28:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:52,106 INFO L225 Difference]: With dead ends: 4652 [2021-11-13 01:28:52,107 INFO L226 Difference]: Without dead ends: 4650 [2021-11-13 01:28:52,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:28:52,111 INFO L933 BasicCegarLoop]: 2765 mSDtfsCounter, 2731 mSDsluCounter, 5518 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 8283 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.18ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.06ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:52,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2742 Valid, 8283 Invalid, 21 Unknown, 0 Unchecked, 40.18ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 102.06ms Time] [2021-11-13 01:28:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-13 01:28:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 4650. [2021-11-13 01:28:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 2976 states have (on average 1.2288306451612903) internal successors, (3657), 3103 states have internal predecessors, (3657), 1393 states have call successors, (1393), 279 states have call predecessors, (1393), 278 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:28:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6449 transitions. [2021-11-13 01:28:52,641 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6449 transitions. Word has length 52 [2021-11-13 01:28:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:52,642 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 6449 transitions. [2021-11-13 01:28:52,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:28:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6449 transitions. [2021-11-13 01:28:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 01:28:52,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:52,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-13 01:28:52,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:52,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:52,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:28:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1181643244, now seen corresponding path program 1 times [2021-11-13 01:28:52,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:52,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535508696] [2021-11-13 01:28:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:52,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:52,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:52,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:28:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:56,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:56,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:28:57,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:57,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535508696] [2021-11-13 01:28:57,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535508696] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:57,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:28:57,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:28:57,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904040727] [2021-11-13 01:28:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:57,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:28:57,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:28:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:57,163 INFO L87 Difference]: Start difference. First operand 4650 states and 6449 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:57,719 INFO L93 Difference]: Finished difference Result 4656 states and 6454 transitions. [2021-11-13 01:28:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-11-13 01:28:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:57,770 INFO L225 Difference]: With dead ends: 4656 [2021-11-13 01:28:57,771 INFO L226 Difference]: Without dead ends: 4654 [2021-11-13 01:28:57,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:28:57,790 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:57,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2746 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 30.70ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 100.73ms Time] [2021-11-13 01:28:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-11-13 01:28:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2021-11-13 01:28:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 2979 states have (on average 1.2286002014098691) internal successors, (3660), 3106 states have internal predecessors, (3660), 1393 states have call successors, (1393), 280 states have call predecessors, (1393), 279 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:28:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 6452 transitions. [2021-11-13 01:28:58,198 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 6452 transitions. Word has length 57 [2021-11-13 01:28:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:58,201 INFO L470 AbstractCegarLoop]: Abstraction has 4654 states and 6452 transitions. [2021-11-13 01:28:58,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 6452 transitions. [2021-11-13 01:28:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 01:28:58,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:58,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-13 01:28:58,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:58,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:58,429 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_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:28:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash -160876412, now seen corresponding path program 1 times [2021-11-13 01:28:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:58,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974579552] [2021-11-13 01:28:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:58,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:58,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:58,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:29:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:29:02,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:29:02,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:02,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974579552] [2021-11-13 01:29:02,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974579552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:02,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:02,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:29:02,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965469871] [2021-11-13 01:29:02,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:02,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:02,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:02,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:02,649 INFO L87 Difference]: Start difference. First operand 4654 states and 6452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 01:29:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:03,141 INFO L93 Difference]: Finished difference Result 4660 states and 6457 transitions. [2021-11-13 01:29:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-11-13 01:29:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:03,178 INFO L225 Difference]: With dead ends: 4660 [2021-11-13 01:29:03,178 INFO L226 Difference]: Without dead ends: 4658 [2021-11-13 01:29:03,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:03,184 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:03,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 23.33ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 88.56ms Time] [2021-11-13 01:29:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2021-11-13 01:29:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4658. [2021-11-13 01:29:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 2982 states have (on average 1.228370221327968) internal successors, (3663), 3109 states have internal predecessors, (3663), 1393 states have call successors, (1393), 281 states have call predecessors, (1393), 280 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:29:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6455 transitions. [2021-11-13 01:29:03,548 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6455 transitions. Word has length 62 [2021-11-13 01:29:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:03,548 INFO L470 AbstractCegarLoop]: Abstraction has 4658 states and 6455 transitions. [2021-11-13 01:29:03,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 01:29:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6455 transitions. [2021-11-13 01:29:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 01:29:03,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:03,551 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2021-11-13 01:29:03,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:03,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:03,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash -16274476, now seen corresponding path program 1 times [2021-11-13 01:29:03,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:03,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465052443] [2021-11-13 01:29:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:03,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:03,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:03,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:29:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:29:07,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:29:07,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:07,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465052443] [2021-11-13 01:29:07,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465052443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:07,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:07,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:29:07,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926108109] [2021-11-13 01:29:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:07,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:07,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:07,718 INFO L87 Difference]: Start difference. First operand 4658 states and 6455 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 01:29:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:08,263 INFO L93 Difference]: Finished difference Result 4664 states and 6460 transitions. [2021-11-13 01:29:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:08,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2021-11-13 01:29:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:08,300 INFO L225 Difference]: With dead ends: 4664 [2021-11-13 01:29:08,301 INFO L226 Difference]: Without dead ends: 4662 [2021-11-13 01:29:08,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:08,307 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:08,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 21.49ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 108.25ms Time] [2021-11-13 01:29:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-11-13 01:29:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4662. [2021-11-13 01:29:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 2985 states have (on average 1.228140703517588) internal successors, (3666), 3112 states have internal predecessors, (3666), 1393 states have call successors, (1393), 282 states have call predecessors, (1393), 281 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:29:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 6458 transitions. [2021-11-13 01:29:08,646 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 6458 transitions. Word has length 67 [2021-11-13 01:29:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:08,647 INFO L470 AbstractCegarLoop]: Abstraction has 4662 states and 6458 transitions. [2021-11-13 01:29:08,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 01:29:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 6458 transitions. [2021-11-13 01:29:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 01:29:08,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:08,649 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-11-13 01:29:08,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:08,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:08,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1205869921, now seen corresponding path program 1 times [2021-11-13 01:29:08,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:08,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393408751] [2021-11-13 01:29:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:08,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:08,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:08,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:29:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:29:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 01:29:12,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:29:14,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:14,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393408751] [2021-11-13 01:29:14,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393408751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:14,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648584301] [2021-11-13 01:29:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:14,114 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:14,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:14,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:14,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 01:29:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:15,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:29:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:29:17,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648584301] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:17,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:29:17,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-13 01:29:17,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781441098] [2021-11-13 01:29:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:17,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:17,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:29:17,577 INFO L87 Difference]: Start difference. First operand 4662 states and 6458 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:29:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:18,313 INFO L93 Difference]: Finished difference Result 4668 states and 6463 transitions. [2021-11-13 01:29:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:18,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-13 01:29:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:18,363 INFO L225 Difference]: With dead ends: 4668 [2021-11-13 01:29:18,363 INFO L226 Difference]: Without dead ends: 4666 [2021-11-13 01:29:18,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:29:18,369 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2729 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.39ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.45ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:18,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 23.39ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 88.45ms Time] [2021-11-13 01:29:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-11-13 01:29:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4666. [2021-11-13 01:29:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 2988 states have (on average 1.2279116465863453) internal successors, (3669), 3115 states have internal predecessors, (3669), 1393 states have call successors, (1393), 283 states have call predecessors, (1393), 282 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:29:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 6461 transitions. [2021-11-13 01:29:18,776 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 6461 transitions. Word has length 86 [2021-11-13 01:29:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:18,777 INFO L470 AbstractCegarLoop]: Abstraction has 4666 states and 6461 transitions. [2021-11-13 01:29:18,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:29:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 6461 transitions. [2021-11-13 01:29:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 01:29:18,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:18,779 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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] [2021-11-13 01:29:18,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:19,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:19,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:19,193 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 523585940, now seen corresponding path program 1 times [2021-11-13 01:29:19,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:19,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757819457] [2021-11-13 01:29:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:19,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:19,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:19,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:29:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:22,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:29:23,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:23,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757819457] [2021-11-13 01:29:23,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757819457] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:23,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:23,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:29:23,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178083064] [2021-11-13 01:29:23,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:23,256 INFO L87 Difference]: Start difference. First operand 4666 states and 6461 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:29:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:23,858 INFO L93 Difference]: Finished difference Result 4672 states and 6466 transitions. [2021-11-13 01:29:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-11-13 01:29:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:23,887 INFO L225 Difference]: With dead ends: 4672 [2021-11-13 01:29:23,888 INFO L226 Difference]: Without dead ends: 4670 [2021-11-13 01:29:23,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:23,894 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.02ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.49ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:23,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2742 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 25.02ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 98.49ms Time] [2021-11-13 01:29:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2021-11-13 01:29:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 4670. [2021-11-13 01:29:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 2991 states have (on average 1.2276830491474424) internal successors, (3672), 3118 states have internal predecessors, (3672), 1393 states have call successors, (1393), 284 states have call predecessors, (1393), 283 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-13 01:29:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 6464 transitions. [2021-11-13 01:29:24,315 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 6464 transitions. Word has length 77 [2021-11-13 01:29:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:24,316 INFO L470 AbstractCegarLoop]: Abstraction has 4670 states and 6464 transitions. [2021-11-13 01:29:24,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:29:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 6464 transitions. [2021-11-13 01:29:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 01:29:24,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:24,324 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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] [2021-11-13 01:29:24,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:24,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:24,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1076086497, now seen corresponding path program 1 times [2021-11-13 01:29:24,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:24,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533822082] [2021-11-13 01:29:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:24,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:24,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:24,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:29:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:29:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 01:29:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 01:29:29,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:29,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533822082] [2021-11-13 01:29:29,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533822082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:29,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1632340195] [2021-11-13 01:29:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:29,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:29,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:29,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:29,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 01:29:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1717 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:29:32,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 01:29:32,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1632340195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:32,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:29:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-13 01:29:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820075195] [2021-11-13 01:29:32,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:32,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:29:32,893 INFO L87 Difference]: Start difference. First operand 4670 states and 6464 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:29:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:33,940 INFO L93 Difference]: Finished difference Result 8737 states and 12553 transitions. [2021-11-13 01:29:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:29:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 96 [2021-11-13 01:29:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:33,991 INFO L225 Difference]: With dead ends: 8737 [2021-11-13 01:29:33,991 INFO L226 Difference]: Without dead ends: 8735 [2021-11-13 01:29:33,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:29:33,999 INFO L933 BasicCegarLoop]: 3664 mSDtfsCounter, 2353 mSDsluCounter, 10091 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2358 SdHoareTripleChecker+Valid, 13755 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.67ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.87ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:34,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2358 Valid, 13755 Invalid, 24 Unknown, 0 Unchecked, 34.67ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 96.87ms Time] [2021-11-13 01:29:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-11-13 01:29:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 8719. [2021-11-13 01:29:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 5571 states have (on average 1.2256327409800754) internal successors, (6828), 5822 states have internal predecessors, (6828), 2598 states have call successors, (2598), 562 states have call predecessors, (2598), 547 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-13 01:29:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 12538 transitions. [2021-11-13 01:29:34,825 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 12538 transitions. Word has length 96 [2021-11-13 01:29:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:34,825 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 12538 transitions. [2021-11-13 01:29:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:29:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 12538 transitions. [2021-11-13 01:29:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 01:29:34,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:34,828 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 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] [2021-11-13 01:29:34,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:35,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:35,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:35,253 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1162188972, now seen corresponding path program 1 times [2021-11-13 01:29:35,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:35,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572506350] [2021-11-13 01:29:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:35,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:35,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:35,259 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:35,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:29:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:38,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 01:29:38,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 01:29:39,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:39,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572506350] [2021-11-13 01:29:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572506350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:39,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:29:39,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056415058] [2021-11-13 01:29:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:39,266 INFO L87 Difference]: Start difference. First operand 8719 states and 12538 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:29:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:40,111 INFO L93 Difference]: Finished difference Result 8729 states and 12547 transitions. [2021-11-13 01:29:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2021-11-13 01:29:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:40,153 INFO L225 Difference]: With dead ends: 8729 [2021-11-13 01:29:40,153 INFO L226 Difference]: Without dead ends: 8727 [2021-11-13 01:29:40,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:40,161 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.95ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:40,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2740 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 18.51ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 101.95ms Time] [2021-11-13 01:29:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2021-11-13 01:29:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 8727. [2021-11-13 01:29:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8727 states, 5577 states have (on average 1.2253899946207638) internal successors, (6834), 5828 states have internal predecessors, (6834), 2598 states have call successors, (2598), 564 states have call predecessors, (2598), 549 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-13 01:29:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8727 states to 8727 states and 12544 transitions. [2021-11-13 01:29:41,089 INFO L78 Accepts]: Start accepts. Automaton has 8727 states and 12544 transitions. Word has length 87 [2021-11-13 01:29:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:41,089 INFO L470 AbstractCegarLoop]: Abstraction has 8727 states and 12544 transitions. [2021-11-13 01:29:41,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:29:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8727 states and 12544 transitions. [2021-11-13 01:29:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 01:29:41,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:41,092 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2021-11-13 01:29:41,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:41,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:41,305 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash 667203012, now seen corresponding path program 1 times [2021-11-13 01:29:41,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:41,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214994513] [2021-11-13 01:29:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:41,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:41,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:41,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:29:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-13 01:29:44,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-13 01:29:45,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:45,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214994513] [2021-11-13 01:29:45,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214994513] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:45,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:29:45,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:29:45,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959943476] [2021-11-13 01:29:45,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:45,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:45,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:29:45,228 INFO L87 Difference]: Start difference. First operand 8727 states and 12544 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:29:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:46,005 INFO L93 Difference]: Finished difference Result 8737 states and 12553 transitions. [2021-11-13 01:29:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 92 [2021-11-13 01:29:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:46,049 INFO L225 Difference]: With dead ends: 8737 [2021-11-13 01:29:46,049 INFO L226 Difference]: Without dead ends: 8735 [2021-11-13 01:29:46,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:29:46,057 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:46,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2739 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 16.25ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 69.61ms Time] [2021-11-13 01:29:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-11-13 01:29:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 8735. [2021-11-13 01:29:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8735 states, 5583 states have (on average 1.2251477700161204) internal successors, (6840), 5834 states have internal predecessors, (6840), 2598 states have call successors, (2598), 566 states have call predecessors, (2598), 551 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-13 01:29:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 12550 transitions. [2021-11-13 01:29:46,901 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 12550 transitions. Word has length 92 [2021-11-13 01:29:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:46,901 INFO L470 AbstractCegarLoop]: Abstraction has 8735 states and 12550 transitions. [2021-11-13 01:29:46,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 01:29:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 12550 transitions. [2021-11-13 01:29:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:29:46,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:46,906 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 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] [2021-11-13 01:29:46,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:47,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:29:47,129 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash -403204969, now seen corresponding path program 1 times [2021-11-13 01:29:47,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:47,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181528329] [2021-11-13 01:29:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:47,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:47,132 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:47,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:29:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:29:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-13 01:29:51,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-13 01:29:52,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:29:52,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181528329] [2021-11-13 01:29:52,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181528329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:29:52,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1039917582] [2021-11-13 01:29:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:52,471 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:29:52,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:29:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-13 01:29:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:29:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:29:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:29:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 01:29:55,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:29:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 01:29:56,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1039917582] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:29:56,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:29:56,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-13 01:29:56,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761618467] [2021-11-13 01:29:56,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:29:56,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:29:56,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:29:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:29:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:29:56,188 INFO L87 Difference]: Start difference. First operand 8735 states and 12550 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 01:29:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:29:57,216 INFO L93 Difference]: Finished difference Result 8745 states and 12559 transitions. [2021-11-13 01:29:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:29:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2021-11-13 01:29:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:29:57,268 INFO L225 Difference]: With dead ends: 8745 [2021-11-13 01:29:57,269 INFO L226 Difference]: Without dead ends: 8743 [2021-11-13 01:29:57,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:29:57,277 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2729 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2731 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.46ms IncrementalHoareTripleChecker+Time [2021-11-13 01:29:57,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2731 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 14.38ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 84.46ms Time] [2021-11-13 01:29:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8743 states. [2021-11-13 01:29:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8743 to 8743. [2021-11-13 01:29:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8743 states, 5589 states have (on average 1.2249060654857757) internal successors, (6846), 5840 states have internal predecessors, (6846), 2598 states have call successors, (2598), 568 states have call predecessors, (2598), 553 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-13 01:29:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8743 states to 8743 states and 12556 transitions. [2021-11-13 01:29:58,338 INFO L78 Accepts]: Start accepts. Automaton has 8743 states and 12556 transitions. Word has length 111 [2021-11-13 01:29:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:29:58,339 INFO L470 AbstractCegarLoop]: Abstraction has 8743 states and 12556 transitions. [2021-11-13 01:29:58,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 01:29:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8743 states and 12556 transitions. [2021-11-13 01:29:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 01:29:58,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:29:58,342 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2021-11-13 01:29:58,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:58,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:29:58,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:29:58,766 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:29:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:29:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 914284420, now seen corresponding path program 1 times [2021-11-13 01:29:58,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:29:58,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526935020] [2021-11-13 01:29:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:29:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:29:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:29:58,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:29:58,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:30:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:01,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:30:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-13 01:30:02,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-13 01:30:03,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:03,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526935020] [2021-11-13 01:30:03,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526935020] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:03,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:03,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:30:03,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796554122] [2021-11-13 01:30:03,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:03,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:30:03,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:30:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:03,306 INFO L87 Difference]: Start difference. First operand 8743 states and 12556 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 01:30:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:04,061 INFO L93 Difference]: Finished difference Result 8753 states and 12565 transitions. [2021-11-13 01:30:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:04,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2021-11-13 01:30:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:04,109 INFO L225 Difference]: With dead ends: 8753 [2021-11-13 01:30:04,109 INFO L226 Difference]: Without dead ends: 8749 [2021-11-13 01:30:04,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:30:04,118 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:04,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 11.98ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 77.59ms Time] [2021-11-13 01:30:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-11-13 01:30:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 8749. [2021-11-13 01:30:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8749 states, 5594 states have (on average 1.2245262781551662) internal successors, (6850), 5844 states have internal predecessors, (6850), 2598 states have call successors, (2598), 570 states have call predecessors, (2598), 554 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-13 01:30:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 12560 transitions. [2021-11-13 01:30:05,085 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 12560 transitions. Word has length 102 [2021-11-13 01:30:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:05,086 INFO L470 AbstractCegarLoop]: Abstraction has 8749 states and 12560 transitions. [2021-11-13 01:30:05,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 01:30:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 12560 transitions. [2021-11-13 01:30:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 01:30:05,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:05,089 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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] [2021-11-13 01:30:05,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:05,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:05,313 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:30:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2118853332, now seen corresponding path program 1 times [2021-11-13 01:30:05,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:05,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600658621] [2021-11-13 01:30:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:05,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:05,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:05,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:30:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:08,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:30:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-13 01:30:09,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-13 01:30:10,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:10,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600658621] [2021-11-13 01:30:10,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600658621] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:10,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:30:10,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-13 01:30:10,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703859104] [2021-11-13 01:30:10,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:10,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:30:10,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:30:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:30:10,134 INFO L87 Difference]: Start difference. First operand 8749 states and 12560 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 01:30:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:11,020 INFO L93 Difference]: Finished difference Result 8755 states and 12565 transitions. [2021-11-13 01:30:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:11,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2021-11-13 01:30:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:11,069 INFO L225 Difference]: With dead ends: 8755 [2021-11-13 01:30:11,069 INFO L226 Difference]: Without dead ends: 8660 [2021-11-13 01:30:11,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:30:11,077 INFO L933 BasicCegarLoop]: 2769 mSDtfsCounter, 2736 mSDsluCounter, 5519 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 8288 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.20ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.90ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:11,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 8288 Invalid, 17 Unknown, 0 Unchecked, 12.20ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 64.90ms Time] [2021-11-13 01:30:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-11-13 01:30:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 8660. [2021-11-13 01:30:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 5543 states have (on average 1.2247880209272957) internal successors, (6789), 5789 states have internal predecessors, (6789), 2576 states have call successors, (2576), 553 states have call predecessors, (2576), 538 states have return successors, (3093), 2444 states have call predecessors, (3093), 2573 states have call successors, (3093) [2021-11-13 01:30:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 12458 transitions. [2021-11-13 01:30:12,268 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 12458 transitions. Word has length 107 [2021-11-13 01:30:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:12,268 INFO L470 AbstractCegarLoop]: Abstraction has 8660 states and 12458 transitions. [2021-11-13 01:30:12,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 01:30:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 12458 transitions. [2021-11-13 01:30:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 01:30:12,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:12,273 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:12,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:12,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:12,489 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:30:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash 360188657, now seen corresponding path program 1 times [2021-11-13 01:30:12,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:12,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651027871] [2021-11-13 01:30:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:12,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:12,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:12,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:30:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:30:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:30:16,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 01:30:17,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651027871] [2021-11-13 01:30:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651027871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:30:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044960191] [2021-11-13 01:30:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:17,949 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:30:17,950 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:30:17,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 01:30:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:22,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 01:30:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 01:30:23,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-13 01:30:24,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044960191] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:30:24,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:30:24,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-13 01:30:24,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165040966] [2021-11-13 01:30:24,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:24,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:30:24,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:24,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:30:24,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:30:24,186 INFO L87 Difference]: Start difference. First operand 8660 states and 12458 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:30:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:25,091 INFO L93 Difference]: Finished difference Result 17368 states and 24986 transitions. [2021-11-13 01:30:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:30:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 150 [2021-11-13 01:30:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:25,151 INFO L225 Difference]: With dead ends: 17368 [2021-11-13 01:30:25,151 INFO L226 Difference]: Without dead ends: 8725 [2021-11-13 01:30:25,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:30:25,256 INFO L933 BasicCegarLoop]: 2813 mSDtfsCounter, 112 mSDsluCounter, 11099 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 13912 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:25,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 13912 Invalid, 12 Unknown, 0 Unchecked, 16.89ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 70.30ms Time] [2021-11-13 01:30:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-11-13 01:30:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 8660. [2021-11-13 01:30:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 5543 states have (on average 1.2246076132058452) internal successors, (6788), 5788 states have internal predecessors, (6788), 2576 states have call successors, (2576), 553 states have call predecessors, (2576), 538 states have return successors, (3093), 2444 states have call predecessors, (3093), 2573 states have call successors, (3093) [2021-11-13 01:30:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 12457 transitions. [2021-11-13 01:30:26,446 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 12457 transitions. Word has length 150 [2021-11-13 01:30:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:26,446 INFO L470 AbstractCegarLoop]: Abstraction has 8660 states and 12457 transitions. [2021-11-13 01:30:26,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:30:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 12457 transitions. [2021-11-13 01:30:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 01:30:26,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:26,451 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:26,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:26,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:30:26,866 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:30:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1123620686, now seen corresponding path program 1 times [2021-11-13 01:30:26,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:26,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489784317] [2021-11-13 01:30:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:26,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:26,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:26,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:30:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:30:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-13 01:30:31,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-13 01:30:33,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:33,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489784317] [2021-11-13 01:30:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489784317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:33,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:33,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 17 [2021-11-13 01:30:33,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884490182] [2021-11-13 01:30:33,312 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:33,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:30:33,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:33,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:30:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:30:33,314 INFO L87 Difference]: Start difference. First operand 8660 states and 12457 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-13 01:30:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:39,192 INFO L93 Difference]: Finished difference Result 18027 states and 25961 transitions. [2021-11-13 01:30:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 01:30:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 154 [2021-11-13 01:30:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:39,242 INFO L225 Difference]: With dead ends: 18027 [2021-11-13 01:30:39,242 INFO L226 Difference]: Without dead ends: 9384 [2021-11-13 01:30:39,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:30:39,308 INFO L933 BasicCegarLoop]: 2878 mSDtfsCounter, 284 mSDsluCounter, 39758 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3231.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 42636 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 75.16ms SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3414.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:39,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 42636 Invalid, 909 Unknown, 0 Unchecked, 75.16ms Time], IncrementalHoareTripleChecker [127 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 3414.36ms Time] [2021-11-13 01:30:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-11-13 01:30:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 8704. [2021-11-13 01:30:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8704 states, 5575 states have (on average 1.223318385650224) internal successors, (6820), 5820 states have internal predecessors, (6820), 2584 states have call successors, (2584), 553 states have call predecessors, (2584), 542 states have return successors, (3105), 2456 states have call predecessors, (3105), 2581 states have call successors, (3105) [2021-11-13 01:30:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8704 states to 8704 states and 12509 transitions. [2021-11-13 01:30:40,653 INFO L78 Accepts]: Start accepts. Automaton has 8704 states and 12509 transitions. Word has length 154 [2021-11-13 01:30:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:40,654 INFO L470 AbstractCegarLoop]: Abstraction has 8704 states and 12509 transitions. [2021-11-13 01:30:40,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-13 01:30:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8704 states and 12509 transitions. [2021-11-13 01:30:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-13 01:30:40,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:40,658 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:40,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 01:30:40,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:40,873 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:30:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:40,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2006974356, now seen corresponding path program 1 times [2021-11-13 01:30:40,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:40,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499554751] [2021-11-13 01:30:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:40,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:40,883 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:40,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:30:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:30:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-13 01:30:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-13 01:30:45,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:45,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499554751] [2021-11-13 01:30:45,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499554751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:45,787 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:30:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795309365] [2021-11-13 01:30:45,787 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:45,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:30:45,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:30:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:30:45,789 INFO L87 Difference]: Start difference. First operand 8704 states and 12509 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 01:30:48,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:30:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:30:49,116 INFO L93 Difference]: Finished difference Result 17487 states and 25161 transitions. [2021-11-13 01:30:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:30:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 158 [2021-11-13 01:30:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:30:49,152 INFO L225 Difference]: With dead ends: 17487 [2021-11-13 01:30:49,153 INFO L226 Difference]: Without dead ends: 8804 [2021-11-13 01:30:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:30:49,200 INFO L933 BasicCegarLoop]: 2760 mSDtfsCounter, 33 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2205.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 5483 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.03ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2260.96ms IncrementalHoareTripleChecker+Time [2021-11-13 01:30:49,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 5483 Invalid, 24 Unknown, 0 Unchecked, 11.03ms Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2260.96ms Time] [2021-11-13 01:30:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8804 states. [2021-11-13 01:30:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8804 to 8788. [2021-11-13 01:30:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 5635 states have (on average 1.222360248447205) internal successors, (6888), 5880 states have internal predecessors, (6888), 2608 states have call successors, (2608), 553 states have call predecessors, (2608), 542 states have return successors, (3129), 2480 states have call predecessors, (3129), 2605 states have call successors, (3129) [2021-11-13 01:30:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 12625 transitions. [2021-11-13 01:30:50,308 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 12625 transitions. Word has length 158 [2021-11-13 01:30:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:30:50,308 INFO L470 AbstractCegarLoop]: Abstraction has 8788 states and 12625 transitions. [2021-11-13 01:30:50,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 01:30:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 12625 transitions. [2021-11-13 01:30:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-13 01:30:50,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:30:50,313 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:30:50,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:30:50,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:30:50,530 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:30:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:30:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -220279145, now seen corresponding path program 1 times [2021-11-13 01:30:50,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:30:50,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910194719] [2021-11-13 01:30:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:30:50,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:30:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:30:50,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:30:50,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:30:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:30:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:30:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:30:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-13 01:30:55,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:30:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-13 01:30:56,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:30:56,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910194719] [2021-11-13 01:30:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910194719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:30:56,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:30:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 18 [2021-11-13 01:30:56,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256802424] [2021-11-13 01:30:56,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:30:56,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 01:30:56,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:30:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 01:30:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:30:56,972 INFO L87 Difference]: Start difference. First operand 8788 states and 12625 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-13 01:31:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:02,345 INFO L93 Difference]: Finished difference Result 18490 states and 26635 transitions. [2021-11-13 01:31:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 01:31:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 162 [2021-11-13 01:31:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:02,398 INFO L225 Difference]: With dead ends: 18490 [2021-11-13 01:31:02,398 INFO L226 Difference]: Without dead ends: 9719 [2021-11-13 01:31:02,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-11-13 01:31:02,456 INFO L933 BasicCegarLoop]: 2958 mSDtfsCounter, 421 mSDsluCounter, 37897 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2897.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 40855 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.39ms SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3072.50ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:02,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 40855 Invalid, 857 Unknown, 0 Unchecked, 51.39ms Time], IncrementalHoareTripleChecker [136 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 3072.50ms Time] [2021-11-13 01:31:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9719 states. [2021-11-13 01:31:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9719 to 8796. [2021-11-13 01:31:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 5639 states have (on average 1.2222025181769818) internal successors, (6892), 5888 states have internal predecessors, (6892), 2608 states have call successors, (2608), 553 states have call predecessors, (2608), 546 states have return successors, (3145), 2480 states have call predecessors, (3145), 2605 states have call successors, (3145) [2021-11-13 01:31:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 12645 transitions. [2021-11-13 01:31:03,669 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 12645 transitions. Word has length 162 [2021-11-13 01:31:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 8796 states and 12645 transitions. [2021-11-13 01:31:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-13 01:31:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 12645 transitions. [2021-11-13 01:31:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-13 01:31:03,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:03,674 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:03,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:03,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:03,886 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:31:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1246889559, now seen corresponding path program 1 times [2021-11-13 01:31:03,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:03,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380170418] [2021-11-13 01:31:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:03,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:03,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:03,892 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:31:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:31:08,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 01:31:11,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 01:31:15,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:15,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380170418] [2021-11-13 01:31:15,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380170418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:15,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616363243] [2021-11-13 01:31:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:15,187 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-13 01:31:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:31:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 01:31:18,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 01:31:19,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1616363243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:19,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:31:19,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [16, 13] total 32 [2021-11-13 01:31:19,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91551988] [2021-11-13 01:31:19,686 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:19,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:19,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-11-13 01:31:19,688 INFO L87 Difference]: Start difference. First operand 8796 states and 12645 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:31:22,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:24,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:25,701 INFO L93 Difference]: Finished difference Result 17667 states and 25429 transitions. [2021-11-13 01:31:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:31:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 181 [2021-11-13 01:31:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:25,736 INFO L225 Difference]: With dead ends: 17667 [2021-11-13 01:31:25,737 INFO L226 Difference]: Without dead ends: 8892 [2021-11-13 01:31:25,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:31:25,778 INFO L933 BasicCegarLoop]: 2763 mSDtfsCounter, 39 mSDsluCounter, 13765 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4747.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 16528 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.55ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4846.27ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:25,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 16528 Invalid, 60 Unknown, 0 Unchecked, 18.55ms Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 4846.27ms Time] [2021-11-13 01:31:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2021-11-13 01:31:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 8848. [2021-11-13 01:31:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2218898469118424) internal successors, (6944), 5936 states have internal predecessors, (6944), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-13 01:31:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12713 transitions. [2021-11-13 01:31:26,608 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12713 transitions. Word has length 181 [2021-11-13 01:31:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12713 transitions. [2021-11-13 01:31:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 01:31:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12713 transitions. [2021-11-13 01:31:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-13 01:31:26,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:26,613 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:26,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:26,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-13 01:31:27,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:27,014 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:31:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -882474446, now seen corresponding path program 1 times [2021-11-13 01:31:27,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:27,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768363635] [2021-11-13 01:31:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:27,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:27,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:27,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:31:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:31:31,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-13 01:31:34,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-13 01:31:38,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:38,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768363635] [2021-11-13 01:31:38,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768363635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:38,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776655483] [2021-11-13 01:31:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:38,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:38,889 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:38,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 01:31:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:31:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-13 01:31:45,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-13 01:31:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1776655483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:46,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672606891] [2021-11-13 01:31:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:46,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:46,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:46,974 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:46,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 01:31:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:31:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-13 01:31:50,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-13 01:31:51,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672606891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:51,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:31:51,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 13, 9, 9] total 36 [2021-11-13 01:31:51,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576051149] [2021-11-13 01:31:51,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:51,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:51,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 01:31:51,101 INFO L87 Difference]: Start difference. First operand 8848 states and 12713 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 01:31:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:52,451 INFO L93 Difference]: Finished difference Result 17703 states and 25469 transitions. [2021-11-13 01:31:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 202 [2021-11-13 01:31:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:52,496 INFO L225 Difference]: With dead ends: 17703 [2021-11-13 01:31:52,497 INFO L226 Difference]: Without dead ends: 8876 [2021-11-13 01:31:52,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1171 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 01:31:52,554 INFO L933 BasicCegarLoop]: 2770 mSDtfsCounter, 468 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 7986 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.93ms SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.89ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:52,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 7986 Invalid, 92 Unknown, 0 Unchecked, 10.93ms Time], IncrementalHoareTripleChecker [84 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 253.89ms Time] [2021-11-13 01:31:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-11-13 01:31:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 8848. [2021-11-13 01:31:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2218898469118424) internal successors, (6944), 5936 states have internal predecessors, (6944), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-13 01:31:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12713 transitions. [2021-11-13 01:31:53,565 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12713 transitions. Word has length 202 [2021-11-13 01:31:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:53,566 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12713 transitions. [2021-11-13 01:31:53,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 01:31:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12713 transitions. [2021-11-13 01:31:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 01:31:53,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:53,570 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:31:53,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:53,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:54,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-13 01:31:54,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:54,205 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:31:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1133296110, now seen corresponding path program 1 times [2021-11-13 01:31:54,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:54,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97039627] [2021-11-13 01:31:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:54,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:54,211 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:54,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 01:31:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:31:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-13 01:32:01,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-13 01:32:06,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:06,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97039627] [2021-11-13 01:32:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97039627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:06,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463506212] [2021-11-13 01:32:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:06,171 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:06,172 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:06,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 01:32:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:10,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:32:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-13 01:32:13,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-13 01:32:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463506212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:14,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804428274] [2021-11-13 01:32:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:14,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:32:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:32:14,263 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:32:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 01:32:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:32:16,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 01:32:18,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-13 01:32:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804428274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:20,327 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:32:20,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [16, 13, 9, 9] total 37 [2021-11-13 01:32:20,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394446943] [2021-11-13 01:32:20,328 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:20,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:32:20,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:32:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 01:32:20,330 INFO L87 Difference]: Start difference. First operand 8848 states and 12713 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-13 01:32:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:21,315 INFO L93 Difference]: Finished difference Result 8858 states and 12721 transitions. [2021-11-13 01:32:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:21,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 204 [2021-11-13 01:32:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:21,340 INFO L225 Difference]: With dead ends: 8858 [2021-11-13 01:32:21,340 INFO L226 Difference]: Without dead ends: 8856 [2021-11-13 01:32:21,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1182 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 01:32:21,346 INFO L933 BasicCegarLoop]: 3815 mSDtfsCounter, 2226 mSDsluCounter, 18029 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 21844 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:21,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 21844 Invalid, 19 Unknown, 0 Unchecked, 28.27ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 67.38ms Time] [2021-11-13 01:32:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-11-13 01:32:22,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 8848. [2021-11-13 01:32:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2213619567130036) internal successors, (6941), 5936 states have internal predecessors, (6941), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-13 01:32:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12710 transitions. [2021-11-13 01:32:22,164 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12710 transitions. Word has length 204 [2021-11-13 01:32:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:22,164 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12710 transitions. [2021-11-13 01:32:22,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-13 01:32:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12710 transitions. [2021-11-13 01:32:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-13 01:32:22,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:22,169 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:32:22,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:22,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:22,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-13 01:32:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:22,786 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:32:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1615441070, now seen corresponding path program 1 times [2021-11-13 01:32:22,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:22,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860930138] [2021-11-13 01:32:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:22,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:22,791 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 01:32:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2427 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:32:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-13 01:32:30,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-13 01:32:35,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860930138] [2021-11-13 01:32:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860930138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1985426919] [2021-11-13 01:32:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:35,559 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:35,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:35,560 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:35,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-13 01:32:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:37,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2427 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:32:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-13 01:32:38,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-11-13 01:32:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1985426919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:39,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:32:39,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 13] total 29 [2021-11-13 01:32:39,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046436304] [2021-11-13 01:32:39,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:32:39,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:32:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:32:39,511 INFO L87 Difference]: Start difference. First operand 8848 states and 12710 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 01:32:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:40,770 INFO L93 Difference]: Finished difference Result 17920 states and 25779 transitions. [2021-11-13 01:32:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:32:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 290 [2021-11-13 01:32:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:40,800 INFO L225 Difference]: With dead ends: 17920 [2021-11-13 01:32:40,800 INFO L226 Difference]: Without dead ends: 9093 [2021-11-13 01:32:40,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-11-13 01:32:40,839 INFO L933 BasicCegarLoop]: 2848 mSDtfsCounter, 158 mSDsluCounter, 8538 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 11386 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.27ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:40,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 11386 Invalid, 110 Unknown, 0 Unchecked, 11.27ms Time], IncrementalHoareTripleChecker [26 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 421.18ms Time] [2021-11-13 01:32:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9093 states. [2021-11-13 01:32:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9093 to 8876. [2021-11-13 01:32:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 5701 states have (on average 1.2213646728644099) internal successors, (6963), 5958 states have internal predecessors, (6963), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-13 01:32:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 12752 transitions. [2021-11-13 01:32:41,564 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 12752 transitions. Word has length 290 [2021-11-13 01:32:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:41,564 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 12752 transitions. [2021-11-13 01:32:41,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 01:32:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 12752 transitions. [2021-11-13 01:32:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-13 01:32:41,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:41,571 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:32:41,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:41,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:41,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:41,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:32:41,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1686079717, now seen corresponding path program 1 times [2021-11-13 01:32:41,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:41,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194653456] [2021-11-13 01:32:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:41,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:41,998 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 01:32:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:32:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-13 01:32:49,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-13 01:32:56,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:56,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194653456] [2021-11-13 01:32:56,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194653456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:56,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1382363608] [2021-11-13 01:32:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:56,068 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:56,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:56,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-13 01:32:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:32:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-13 01:32:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-13 01:32:59,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1382363608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:59,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:32:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13] total 26 [2021-11-13 01:32:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049551267] [2021-11-13 01:32:59,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:59,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:32:59,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:32:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:32:59,325 INFO L87 Difference]: Start difference. First operand 8876 states and 12752 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-13 01:33:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:00,076 INFO L93 Difference]: Finished difference Result 18378 states and 26501 transitions. [2021-11-13 01:33:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 302 [2021-11-13 01:33:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:00,115 INFO L225 Difference]: With dead ends: 18378 [2021-11-13 01:33:00,116 INFO L226 Difference]: Without dead ends: 9523 [2021-11-13 01:33:00,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:33:00,153 INFO L933 BasicCegarLoop]: 2849 mSDtfsCounter, 205 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.87ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:00,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 5606 Invalid, 6 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 17.87ms Time] [2021-11-13 01:33:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-11-13 01:33:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8878. [2021-11-13 01:33:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8878 states, 5703 states have (on average 1.221287041907768) internal successors, (6965), 5960 states have internal predecessors, (6965), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-13 01:33:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 12754 transitions. [2021-11-13 01:33:00,896 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 12754 transitions. Word has length 302 [2021-11-13 01:33:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:00,896 INFO L470 AbstractCegarLoop]: Abstraction has 8878 states and 12754 transitions. [2021-11-13 01:33:00,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-13 01:33:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 12754 transitions. [2021-11-13 01:33:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-13 01:33:00,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:00,903 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:33:00,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:01,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-13 01:33:01,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:01,322 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:33:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1570303005, now seen corresponding path program 1 times [2021-11-13 01:33:01,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:01,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390030459] [2021-11-13 01:33:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:01,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:01,327 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:01,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 01:33:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:33:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-13 01:33:08,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-13 01:33:14,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:14,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390030459] [2021-11-13 01:33:14,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390030459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:33:14,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [263360986] [2021-11-13 01:33:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:14,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:33:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:33:14,333 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:33:14,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-13 01:33:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:33:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 166 proven. 14 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-13 01:33:21,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-13 01:33:23,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [263360986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:33:23,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939152946] [2021-11-13 01:33:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:23,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:33:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:33:23,947 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:33:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 01:33:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:33:25,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-13 01:33:27,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-13 01:33:28,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939152946] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:33:28,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 01:33:28,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 13, 9, 9, 8] total 33 [2021-11-13 01:33:28,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070684195] [2021-11-13 01:33:28,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:28,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:33:28,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:33:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 01:33:28,262 INFO L87 Difference]: Start difference. First operand 8878 states and 12754 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-13 01:33:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:30,387 INFO L93 Difference]: Finished difference Result 18002 states and 25893 transitions. [2021-11-13 01:33:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:33:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 302 [2021-11-13 01:33:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:30,420 INFO L225 Difference]: With dead ends: 18002 [2021-11-13 01:33:30,421 INFO L226 Difference]: Without dead ends: 9145 [2021-11-13 01:33:30,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1774 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 01:33:30,462 INFO L933 BasicCegarLoop]: 2827 mSDtfsCounter, 178 mSDsluCounter, 16755 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 918.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 19582 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.60ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 974.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:30,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 19582 Invalid, 302 Unknown, 0 Unchecked, 19.60ms Time], IncrementalHoareTripleChecker [30 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 974.29ms Time] [2021-11-13 01:33:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2021-11-13 01:33:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 8894. [2021-11-13 01:33:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8894 states, 5719 states have (on average 1.2206679489421228) internal successors, (6981), 5972 states have internal predecessors, (6981), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-13 01:33:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 12770 transitions. [2021-11-13 01:33:31,328 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 12770 transitions. Word has length 302 [2021-11-13 01:33:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:31,328 INFO L470 AbstractCegarLoop]: Abstraction has 8894 states and 12770 transitions. [2021-11-13 01:33:31,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-13 01:33:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 12770 transitions. [2021-11-13 01:33:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-13 01:33:31,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:31,334 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-13 01:33:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:31,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:31,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-13 01:33:31,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:33:31,958 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:33:31,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1360149695, now seen corresponding path program 1 times [2021-11-13 01:33:31,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:31,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374978952] [2021-11-13 01:33:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:31,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:31,962 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:31,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-13 01:33:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:35,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:33:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 284 proven. 42 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-13 01:33:39,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-13 01:33:43,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:43,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374978952] [2021-11-13 01:33:43,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374978952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:33:43,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339101971] [2021-11-13 01:33:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:43,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:33:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:33:43,219 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:33:43,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-13 01:33:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:33:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 264 proven. 14 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-13 01:33:50,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-13 01:33:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339101971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:33:51,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017405827] [2021-11-13 01:33:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:51,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:33:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:33:51,419 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:33:51,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 01:33:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:33:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-13 01:33:54,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-13 01:33:55,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017405827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:55,287 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:33:55,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13, 9, 9] total 34 [2021-11-13 01:33:55,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125336712] [2021-11-13 01:33:55,287 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:55,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:33:55,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:33:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:33:55,289 INFO L87 Difference]: Start difference. First operand 8894 states and 12770 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-13 01:33:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:56,202 INFO L93 Difference]: Finished difference Result 17823 states and 25633 transitions. [2021-11-13 01:33:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:33:56,203 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), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 314 [2021-11-13 01:33:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:56,237 INFO L225 Difference]: With dead ends: 17823 [2021-11-13 01:33:56,237 INFO L226 Difference]: Without dead ends: 8950 [2021-11-13 01:33:56,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1845 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:33:56,281 INFO L933 BasicCegarLoop]: 2791 mSDtfsCounter, 80 mSDsluCounter, 5390 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 205.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8181 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:56,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8181 Invalid, 50 Unknown, 0 Unchecked, 9.16ms Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 225.40ms Time] [2021-11-13 01:33:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-11-13 01:33:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 8950. [2021-11-13 01:33:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8950 states, 5743 states have (on average 1.2200940275117533) internal successors, (7007), 5995 states have internal predecessors, (7007), 2656 states have call successors, (2656), 553 states have call predecessors, (2656), 548 states have return successors, (3194), 2529 states have call predecessors, (3194), 2653 states have call successors, (3194) [2021-11-13 01:33:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 12857 transitions. [2021-11-13 01:33:57,012 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 12857 transitions. Word has length 314 [2021-11-13 01:33:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 8950 states and 12857 transitions. [2021-11-13 01:33:57,013 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), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-13 01:33:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 12857 transitions. [2021-11-13 01:33:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-11-13 01:33:57,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:57,019 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:33:57,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-13 01:33:57,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:57,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:33:57,622 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:33:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -558244247, now seen corresponding path program 1 times [2021-11-13 01:33:57,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:57,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782526624] [2021-11-13 01:33:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:57,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:57,626 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-13 01:34:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:34:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 69 proven. 42 refuted. 0 times theorem prover too weak. 1590 trivial. 0 not checked. [2021-11-13 01:34:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2021-11-13 01:34:10,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:10,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782526624] [2021-11-13 01:34:10,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782526624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:10,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889248456] [2021-11-13 01:34:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:10,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:10,060 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:10,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-13 01:34:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2832 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:34:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-11-13 01:34:13,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2021-11-13 01:34:14,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889248456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:14,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:34:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13] total 28 [2021-11-13 01:34:14,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31241793] [2021-11-13 01:34:14,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:34:14,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:34:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:34:14,307 INFO L87 Difference]: Start difference. First operand 8950 states and 12857 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-13 01:34:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:15,085 INFO L93 Difference]: Finished difference Result 17895 states and 25750 transitions. [2021-11-13 01:34:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 526 [2021-11-13 01:34:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:15,131 INFO L225 Difference]: With dead ends: 17895 [2021-11-13 01:34:15,131 INFO L226 Difference]: Without dead ends: 8966 [2021-11-13 01:34:15,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 2074 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-13 01:34:15,191 INFO L933 BasicCegarLoop]: 2761 mSDtfsCounter, 21 mSDsluCounter, 2742 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 5503 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.93ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:15,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 5503 Invalid, 29 Unknown, 0 Unchecked, 5.93ms Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 82.04ms Time] [2021-11-13 01:34:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2021-11-13 01:34:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8966. [2021-11-13 01:34:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 5751 states have (on average 1.219961745783342) internal successors, (7016), 6004 states have internal predecessors, (7016), 2664 states have call successors, (2664), 553 states have call predecessors, (2664), 548 states have return successors, (3202), 2536 states have call predecessors, (3202), 2661 states have call successors, (3202) [2021-11-13 01:34:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 12882 transitions. [2021-11-13 01:34:15,969 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 12882 transitions. Word has length 526 [2021-11-13 01:34:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:15,971 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 12882 transitions. [2021-11-13 01:34:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-13 01:34:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 12882 transitions. [2021-11-13 01:34:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2021-11-13 01:34:15,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:15,985 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 01:34:16,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:16,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-13 01:34:16,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:16,402 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:34:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash 56003887, now seen corresponding path program 1 times [2021-11-13 01:34:16,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:16,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352508900] [2021-11-13 01:34:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:16,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:16,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:16,406 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:16,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-13 01:34:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 01:34:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 69 proven. 42 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2021-11-13 01:34:25,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 4127 trivial. 0 not checked. [2021-11-13 01:34:30,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:30,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352508900] [2021-11-13 01:34:30,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352508900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:30,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608542468] [2021-11-13 01:34:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:34:30,123 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:34:30,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-13 01:34:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 1694 proven. 14 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-11-13 01:34:33,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4179 trivial. 0 not checked. [2021-11-13 01:34:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608542468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:36,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94465502] [2021-11-13 01:34:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:36,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:34:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:36,221 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:34:36,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-13 01:34:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:38,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:34:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 1694 proven. 14 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-11-13 01:34:39,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4179 trivial. 0 not checked. [2021-11-13 01:34:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94465502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:34:41,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:34:41,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 5, 5, 5, 5] total 32 [2021-11-13 01:34:41,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135357376] [2021-11-13 01:34:41,350 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:34:41,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 01:34:41,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 01:34:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-11-13 01:34:41,354 INFO L87 Difference]: Start difference. First operand 8966 states and 12882 transitions. Second operand has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) [2021-11-13 01:34:47,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:52,285 INFO L93 Difference]: Finished difference Result 18060 states and 26018 transitions. [2021-11-13 01:34:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 01:34:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) Word has length 706 [2021-11-13 01:34:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:52,313 INFO L225 Difference]: With dead ends: 18060 [2021-11-13 01:34:52,313 INFO L226 Difference]: Without dead ends: 9115 [2021-11-13 01:34:52,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4237 GetRequests, 4202 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 01:34:52,344 INFO L933 BasicCegarLoop]: 2892 mSDtfsCounter, 465 mSDsluCounter, 51254 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 198 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8407.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 54146 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 63.08ms SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8943.63ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:52,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 54146 Invalid, 1560 Unknown, 0 Unchecked, 63.08ms Time], IncrementalHoareTripleChecker [198 Valid, 1361 Invalid, 1 Unknown, 0 Unchecked, 8943.63ms Time] [2021-11-13 01:34:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9115 states. [2021-11-13 01:34:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9115 to 8934. [2021-11-13 01:34:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8934 states, 5707 states have (on average 1.2178026984405117) internal successors, (6950), 5959 states have internal predecessors, (6950), 2677 states have call successors, (2677), 552 states have call predecessors, (2677), 547 states have return successors, (3215), 2546 states have call predecessors, (3215), 2674 states have call successors, (3215) [2021-11-13 01:34:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8934 states to 8934 states and 12842 transitions. [2021-11-13 01:34:52,976 INFO L78 Accepts]: Start accepts. Automaton has 8934 states and 12842 transitions. Word has length 706 [2021-11-13 01:34:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:52,977 INFO L470 AbstractCegarLoop]: Abstraction has 8934 states and 12842 transitions. [2021-11-13 01:34:52,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) [2021-11-13 01:34:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8934 states and 12842 transitions. [2021-11-13 01:34:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2021-11-13 01:34:52,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:52,990 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 11, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:53,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:53,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:53,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-13 01:34:53,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:53,606 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:34:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2054767217, now seen corresponding path program 1 times [2021-11-13 01:34:53,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:53,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475968286] [2021-11-13 01:34:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:53,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:53,613 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:53,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-13 01:34:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2836 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:34:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1726 trivial. 0 not checked. [2021-11-13 01:35:00,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1726 trivial. 0 not checked. [2021-11-13 01:35:02,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:02,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475968286] [2021-11-13 01:35:02,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475968286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:02,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821728008] [2021-11-13 01:35:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:02,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:02,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:02,710 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-13 01:35:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:35:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-11-13 01:35:07,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-11-13 01:35:08,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821728008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:08,853 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:35:08,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [16, 16] total 20 [2021-11-13 01:35:08,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062340157] [2021-11-13 01:35:08,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:08,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:35:08,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:35:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:35:08,856 INFO L87 Difference]: Start difference. First operand 8934 states and 12842 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2021-11-13 01:35:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:10,011 INFO L93 Difference]: Finished difference Result 21572 states and 31049 transitions. [2021-11-13 01:35:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:35:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) Word has length 591 [2021-11-13 01:35:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:10,087 INFO L225 Difference]: With dead ends: 21572 [2021-11-13 01:35:10,088 INFO L226 Difference]: Without dead ends: 15777 [2021-11-13 01:35:10,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2360 GetRequests, 2342 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:35:10,127 INFO L933 BasicCegarLoop]: 3528 mSDtfsCounter, 2669 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2669 SdHoareTripleChecker+Valid, 6239 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.82ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:10,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2669 Valid, 6239 Invalid, 9 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 30.82ms Time] [2021-11-13 01:35:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-11-13 01:35:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15733. [2021-11-13 01:35:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 10099 states have (on average 1.2185364887612635) internal successors, (12306), 10551 states have internal predecessors, (12306), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 948 states have return successors, (5644), 4454 states have call predecessors, (5644), 4680 states have call successors, (5644) [2021-11-13 01:35:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 22633 transitions. [2021-11-13 01:35:11,562 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 22633 transitions. Word has length 591 [2021-11-13 01:35:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:11,562 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 22633 transitions. [2021-11-13 01:35:11,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2021-11-13 01:35:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 22633 transitions. [2021-11-13 01:35:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2021-11-13 01:35:11,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:11,576 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:35:11,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:11,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-13 01:35:11,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:11,985 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:35:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1967259234, now seen corresponding path program 1 times [2021-11-13 01:35:11,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:11,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640580028] [2021-11-13 01:35:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:11,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:11,994 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:12,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-13 01:35:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 3931 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:35:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 12963 trivial. 0 not checked. [2021-11-13 01:35:20,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13089 trivial. 0 not checked. [2021-11-13 01:35:23,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:23,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640580028] [2021-11-13 01:35:23,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640580028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:23,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:23,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:35:23,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463665292] [2021-11-13 01:35:23,303 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:23,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:35:23,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:35:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:23,306 INFO L87 Difference]: Start difference. First operand 15733 states and 22633 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-13 01:35:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:25,427 INFO L93 Difference]: Finished difference Result 35179 states and 50993 transitions. [2021-11-13 01:35:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:35:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1098 [2021-11-13 01:35:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:25,495 INFO L225 Difference]: With dead ends: 35179 [2021-11-13 01:35:25,496 INFO L226 Difference]: Without dead ends: 19465 [2021-11-13 01:35:25,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2194 GetRequests, 2192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:35:25,577 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 554 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 470.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 8936 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:25,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 8936 Invalid, 97 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 520.59ms Time] [2021-11-13 01:35:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19465 states. [2021-11-13 01:35:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19465 to 15765. [2021-11-13 01:35:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15765 states, 10131 states have (on average 1.2186358701016682) internal successors, (12346), 10583 states have internal predecessors, (12346), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 948 states have return successors, (5644), 4454 states have call predecessors, (5644), 4680 states have call successors, (5644) [2021-11-13 01:35:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15765 states to 15765 states and 22673 transitions. [2021-11-13 01:35:27,214 INFO L78 Accepts]: Start accepts. Automaton has 15765 states and 22673 transitions. Word has length 1098 [2021-11-13 01:35:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:27,214 INFO L470 AbstractCegarLoop]: Abstraction has 15765 states and 22673 transitions. [2021-11-13 01:35:27,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-13 01:35:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 15765 states and 22673 transitions. [2021-11-13 01:35:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2021-11-13 01:35:27,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:27,228 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:35:27,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-13 01:35:27,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:27,436 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:35:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2132044230, now seen corresponding path program 1 times [2021-11-13 01:35:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:27,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985966633] [2021-11-13 01:35:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:27,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:27,442 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:27,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-13 01:35:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 3935 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:35:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 13039 trivial. 0 not checked. [2021-11-13 01:35:37,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13089 trivial. 0 not checked. [2021-11-13 01:35:40,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:40,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985966633] [2021-11-13 01:35:40,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985966633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:40,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:40,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 01:35:40,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504854180] [2021-11-13 01:35:40,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:40,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 01:35:40,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 01:35:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:35:40,726 INFO L87 Difference]: Start difference. First operand 15765 states and 22673 transitions. Second operand has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-13 01:35:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:43,852 INFO L93 Difference]: Finished difference Result 31549 states and 45907 transitions. [2021-11-13 01:35:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:35:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) Word has length 1101 [2021-11-13 01:35:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:43,911 INFO L225 Difference]: With dead ends: 31549 [2021-11-13 01:35:43,911 INFO L226 Difference]: Without dead ends: 15803 [2021-11-13 01:35:43,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2204 GetRequests, 2190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:35:43,985 INFO L933 BasicCegarLoop]: 2726 mSDtfsCounter, 8 mSDsluCounter, 27197 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1143.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29923 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.73ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1257.52ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:43,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 29923 Invalid, 251 Unknown, 0 Unchecked, 29.73ms Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1257.52ms Time] [2021-11-13 01:35:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15803 states. [2021-11-13 01:35:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15803 to 15791. [2021-11-13 01:35:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15791 states, 10153 states have (on average 1.2181621195705703) internal successors, (12368), 10605 states have internal predecessors, (12368), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 952 states have return successors, (5660), 4458 states have call predecessors, (5660), 4680 states have call successors, (5660) [2021-11-13 01:35:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15791 states to 15791 states and 22711 transitions. [2021-11-13 01:35:45,486 INFO L78 Accepts]: Start accepts. Automaton has 15791 states and 22711 transitions. Word has length 1101 [2021-11-13 01:35:45,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:45,486 INFO L470 AbstractCegarLoop]: Abstraction has 15791 states and 22711 transitions. [2021-11-13 01:35:45,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-13 01:35:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 15791 states and 22711 transitions. [2021-11-13 01:35:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1286 [2021-11-13 01:35:45,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:45,502 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 18, 18, 18, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:45,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:45,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:45,703 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:35:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash -996894109, now seen corresponding path program 1 times [2021-11-13 01:35:45,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:45,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848933161] [2021-11-13 01:35:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:45,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:45,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:45,709 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:45,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-13 01:35:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 4571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:35:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13684 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2021-11-13 01:35:56,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13684 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 13622 trivial. 0 not checked. [2021-11-13 01:35:59,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:59,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848933161] [2021-11-13 01:35:59,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848933161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:59,739 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:59,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:35:59,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380928839] [2021-11-13 01:35:59,740 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:59,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:35:59,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:35:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:35:59,743 INFO L87 Difference]: Start difference. First operand 15791 states and 22711 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-13 01:36:01,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:02,681 INFO L93 Difference]: Finished difference Result 22657 states and 32592 transitions. [2021-11-13 01:36:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) Word has length 1285 [2021-11-13 01:36:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:02,708 INFO L225 Difference]: With dead ends: 22657 [2021-11-13 01:36:02,708 INFO L226 Difference]: Without dead ends: 6885 [2021-11-13 01:36:02,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2568 GetRequests, 2567 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:36:02,774 INFO L933 BasicCegarLoop]: 2702 mSDtfsCounter, 247 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2147.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 5028 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2176.54ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:02,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 5028 Invalid, 13 Unknown, 0 Unchecked, 6.79ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2176.54ms Time] [2021-11-13 01:36:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2021-11-13 01:36:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6885. [2021-11-13 01:36:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 4451 states have (on average 1.2141091889463043) internal successors, (5404), 4647 states have internal predecessors, (5404), 2022 states have call successors, (2022), 409 states have call predecessors, (2022), 409 states have return successors, (2434), 1924 states have call predecessors, (2434), 2019 states have call successors, (2434) [2021-11-13 01:36:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 9860 transitions. [2021-11-13 01:36:03,472 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 9860 transitions. Word has length 1285 [2021-11-13 01:36:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:03,472 INFO L470 AbstractCegarLoop]: Abstraction has 6885 states and 9860 transitions. [2021-11-13 01:36:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-13 01:36:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 9860 transitions. [2021-11-13 01:36:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2021-11-13 01:36:03,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:03,483 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-13 01:36:03,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:03,697 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:36:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2069150648, now seen corresponding path program 1 times [2021-11-13 01:36:03,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:03,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284190370] [2021-11-13 01:36:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:03,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:03,703 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:03,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-13 01:36:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 3937 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:36:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 13036 trivial. 0 not checked. [2021-11-13 01:36:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13086 trivial. 0 not checked. [2021-11-13 01:36:15,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284190370] [2021-11-13 01:36:15,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284190370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:15,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703886262] [2021-11-13 01:36:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:15,689 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:15,690 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:15,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-13 01:36:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 3937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:36:17,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 3542 proven. 186 refuted. 0 times theorem prover too weak. 9361 trivial. 0 not checked. [2021-11-13 01:36:20,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2021-11-13 01:36:23,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703886262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:23,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114042925] [2021-11-13 01:36:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:23,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:23,830 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:23,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-13 01:36:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 3937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:36:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 3542 proven. 186 refuted. 0 times theorem prover too weak. 9361 trivial. 0 not checked. [2021-11-13 01:36:28,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2021-11-13 01:36:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114042925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:30,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:36:30,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 9, 9, 9] total 24 [2021-11-13 01:36:30,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540566463] [2021-11-13 01:36:30,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:30,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 01:36:30,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 01:36:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-11-13 01:36:30,953 INFO L87 Difference]: Start difference. First operand 6885 states and 9860 transitions. Second operand has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) [2021-11-13 01:36:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:35,028 INFO L93 Difference]: Finished difference Result 13789 states and 19799 transitions. [2021-11-13 01:36:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:36:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) Word has length 1101 [2021-11-13 01:36:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:35,054 INFO L225 Difference]: With dead ends: 13789 [2021-11-13 01:36:35,054 INFO L226 Difference]: Without dead ends: 6923 [2021-11-13 01:36:35,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6606 GetRequests, 6578 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-11-13 01:36:35,090 INFO L933 BasicCegarLoop]: 2849 mSDtfsCounter, 536 mSDsluCounter, 24990 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2485.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 27839 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.98ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2678.73ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:35,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 27839 Invalid, 825 Unknown, 0 Unchecked, 27.98ms Time], IncrementalHoareTripleChecker [154 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 2678.73ms Time] [2021-11-13 01:36:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2021-11-13 01:36:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 6923. [2021-11-13 01:36:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 4473 states have (on average 1.2135032416722558) internal successors, (5428), 4671 states have internal predecessors, (5428), 2038 states have call successors, (2038), 409 states have call predecessors, (2038), 409 states have return successors, (2450), 1938 states have call predecessors, (2450), 2035 states have call successors, (2450) [2021-11-13 01:36:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9916 transitions. [2021-11-13 01:36:35,733 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9916 transitions. Word has length 1101 [2021-11-13 01:36:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:35,733 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9916 transitions. [2021-11-13 01:36:35,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) [2021-11-13 01:36:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9916 transitions. [2021-11-13 01:36:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1478 [2021-11-13 01:36:35,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:35,751 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 18, 18, 18, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:35,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:36,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-13 01:36:36,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-13 01:36:36,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:36,356 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:36:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash -466840183, now seen corresponding path program 1 times [2021-11-13 01:36:36,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:36,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138533619] [2021-11-13 01:36:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:36,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:36,362 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:36,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-13 01:36:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:43,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 4930 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:36:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 19896 trivial. 0 not checked. [2021-11-13 01:36:48,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 19976 trivial. 0 not checked. [2021-11-13 01:36:53,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:53,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138533619] [2021-11-13 01:36:53,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138533619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:53,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1611819092] [2021-11-13 01:36:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:53,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:53,260 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:53,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-13 01:36:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:58,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 4930 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:36:58,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 19896 trivial. 0 not checked. [2021-11-13 01:37:03,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 19976 trivial. 0 not checked. [2021-11-13 01:37:06,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1611819092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:06,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244267759] [2021-11-13 01:37:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:06,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:37:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:37:06,545 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:37:06,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-13 01:37:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 4930 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:37:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20010 trivial. 0 not checked. [2021-11-13 01:37:17,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20010 trivial. 0 not checked. [2021-11-13 01:37:21,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244267759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:21,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:37:21,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10, 10, 10, 10] total 23 [2021-11-13 01:37:21,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050123062] [2021-11-13 01:37:21,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:21,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:37:21,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:37:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:37:21,079 INFO L87 Difference]: Start difference. First operand 6923 states and 9916 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-13 01:37:23,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:24,115 INFO L93 Difference]: Finished difference Result 6929 states and 9921 transitions. [2021-11-13 01:37:24,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:37:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) Word has length 1477 [2021-11-13 01:37:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:24,137 INFO L225 Difference]: With dead ends: 6929 [2021-11-13 01:37:24,138 INFO L226 Difference]: Without dead ends: 6927 [2021-11-13 01:37:24,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8858 GetRequests, 8835 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:37:24,142 INFO L933 BasicCegarLoop]: 4770 mSDtfsCounter, 2594 mSDsluCounter, 16559 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2225.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 21329 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2228.54ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:24,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2595 Valid, 21329 Invalid, 16 Unknown, 0 Unchecked, 20.41ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2228.54ms Time] [2021-11-13 01:37:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2021-11-13 01:37:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6923. [2021-11-13 01:37:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 4473 states have (on average 1.213056114464565) internal successors, (5426), 4671 states have internal predecessors, (5426), 2038 states have call successors, (2038), 409 states have call predecessors, (2038), 409 states have return successors, (2450), 1938 states have call predecessors, (2450), 2035 states have call successors, (2450) [2021-11-13 01:37:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9914 transitions. [2021-11-13 01:37:24,676 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9914 transitions. Word has length 1477 [2021-11-13 01:37:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:24,678 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9914 transitions. [2021-11-13 01:37:24,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-13 01:37:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9914 transitions. [2021-11-13 01:37:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2548 [2021-11-13 01:37:24,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:24,730 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 70, 70, 68, 68, 68, 68, 68, 68, 68, 68, 66, 66, 66, 66, 66, 66, 66, 66, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:24,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:25,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:25,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2021-11-13 01:37:25,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:37:25,331 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:37:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1558719367, now seen corresponding path program 1 times [2021-11-13 01:37:25,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:25,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132950058] [2021-11-13 01:37:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:25,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:25,338 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:25,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-13 01:37:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:31,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 6831 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:37:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 503 proven. 21 refuted. 0 times theorem prover too weak. 78182 trivial. 0 not checked. [2021-11-13 01:37:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 78676 trivial. 0 not checked. [2021-11-13 01:37:49,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:49,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132950058] [2021-11-13 01:37:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132950058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:49,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649492110] [2021-11-13 01:37:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:49,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:37:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:37:49,262 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:37:49,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-13 01:37:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 6831 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:37:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 773 proven. 0 refuted. 0 times theorem prover too weak. 77933 trivial. 0 not checked. [2021-11-13 01:38:12,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 78697 trivial. 0 not checked. [2021-11-13 01:38:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649492110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:18,800 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:38:18,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10, 10] total 19 [2021-11-13 01:38:18,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129323353] [2021-11-13 01:38:18,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:18,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:38:18,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:38:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:38:18,806 INFO L87 Difference]: Start difference. First operand 6923 states and 9914 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-13 01:38:21,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:22,532 INFO L93 Difference]: Finished difference Result 17581 states and 25891 transitions. [2021-11-13 01:38:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:38:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) Word has length 2547 [2021-11-13 01:38:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:22,590 INFO L225 Difference]: With dead ends: 17581 [2021-11-13 01:38:22,590 INFO L226 Difference]: Without dead ends: 10677 [2021-11-13 01:38:22,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10184 GetRequests, 10167 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:38:22,623 INFO L933 BasicCegarLoop]: 3284 mSDtfsCounter, 2424 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2618.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 5913 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.53ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2708.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:22,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2424 Valid, 5913 Invalid, 118 Unknown, 0 Unchecked, 9.53ms Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2708.03ms Time] [2021-11-13 01:38:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-11-13 01:38:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10575. [2021-11-13 01:38:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10575 states, 6819 states have (on average 1.2133743950725913) internal successors, (8274), 7119 states have internal predecessors, (8274), 3141 states have call successors, (3141), 609 states have call predecessors, (3141), 612 states have return successors, (3995), 2988 states have call predecessors, (3995), 3138 states have call successors, (3995) [2021-11-13 01:38:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10575 states to 10575 states and 15410 transitions. [2021-11-13 01:38:23,513 INFO L78 Accepts]: Start accepts. Automaton has 10575 states and 15410 transitions. Word has length 2547 [2021-11-13 01:38:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:23,515 INFO L470 AbstractCegarLoop]: Abstraction has 10575 states and 15410 transitions. [2021-11-13 01:38:23,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-13 01:38:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 10575 states and 15410 transitions. [2021-11-13 01:38:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2752 [2021-11-13 01:38:23,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:23,591 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 70, 70, 68, 68, 68, 68, 68, 68, 68, 68, 66, 66, 66, 66, 66, 66, 66, 66, 26, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:23,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:23,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:23,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:23,992 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-13 01:38:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1037742512, now seen corresponding path program 1 times [2021-11-13 01:38:23,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:23,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392213653] [2021-11-13 01:38:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:23,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:23,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:24,000 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:24,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-13 01:38:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 7517 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:38:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 808 proven. 21 refuted. 0 times theorem prover too weak. 78740 trivial. 0 not checked. [2021-11-13 01:38:43,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 79524 trivial. 0 not checked. [2021-11-13 01:38:51,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:51,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392213653] [2021-11-13 01:38:51,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392213653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:51,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786689472] [2021-11-13 01:38:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:51,138 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:51,139 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-13 01:38:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:58,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 7517 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:38:58,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 808 proven. 21 refuted. 0 times theorem prover too weak. 78740 trivial. 0 not checked. [2021-11-13 01:39:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 79524 trivial. 0 not checked. [2021-11-13 01:39:14,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786689472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:14,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359921765] [2021-11-13 01:39:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:14,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:14,769 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:14,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32aff7a8-89fa-46a4-a791-ea9c5b2d40ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-13 01:39:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 7517 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 79512 trivial. 0 not checked. [2021-11-13 01:39:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates...