./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-amd-pcnet32.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_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/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_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/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_15a6a300-a93c-446e-9176-54120e0e4059/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 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:15,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:15,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:15,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:15,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:15,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:15,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:15,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:15,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:15,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:15,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:15,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:15,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:15,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:15,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:15,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:15,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:15,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:15,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:15,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:15,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:15,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:15,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:15,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:15,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:15,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:15,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:15,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:15,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:15,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:15,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:15,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:15,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:15,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:15,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:15,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:15,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:15,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:15,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:15,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:15,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:15,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:43:15,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:15,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:15,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:15,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:15,665 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:15,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:15,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:15,665 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:43:15,672 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:15,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:15,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:43:15,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:43:15,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:15,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:43:15,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:43:15,674 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:43:15,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:15,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:43:15,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:15,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:15,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:15,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:15,676 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:15,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:15,677 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:15,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:15,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:15,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:15,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:15,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:15,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:15,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:15,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:43:15,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:43:15,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:15,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:15,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:15,680 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_15a6a300-a93c-446e-9176-54120e0e4059/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2021-11-12 23:43:15,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:15,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:15,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:15,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:15,991 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:15,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-12 23:43:16,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/2f1a7d592/a79ce0f57a4c4efabb51e824b1bf408e/FLAG775f62866 [2021-11-12 23:43:17,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:17,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-12 23:43:17,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/2f1a7d592/a79ce0f57a4c4efabb51e824b1bf408e/FLAG775f62866 [2021-11-12 23:43:17,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/2f1a7d592/a79ce0f57a4c4efabb51e824b1bf408e [2021-11-12 23:43:17,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:17,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:17,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:17,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:17,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:17,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:17" (1/1) ... [2021-11-12 23:43:17,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38111636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:17, skipping insertion in model container [2021-11-12 23:43:17,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:17" (1/1) ... [2021-11-12 23:43:17,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:17,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:20,383 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:43:20,569 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:43:20,571 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:43:21,924 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-12 23:43:21,927 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-12 23:43:21,927 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-12 23:43:21,928 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-12 23:43:21,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:21,985 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) [2021-11-12 23:43:21,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36681743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:21, skipping insertion in model container [2021-11-12 23:43:21,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:21,986 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:43:21,988 INFO L158 Benchmark]: Toolchain (without parser) took 4495.70ms. Allocated memory was 134.2MB in the beginning and 199.2MB in the end (delta: 65.0MB). Free memory was 86.0MB in the beginning and 114.9MB in the end (delta: -28.9MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2021-11-12 23:43:21,989 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:43:21,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4488.90ms. Allocated memory was 134.2MB in the beginning and 199.2MB in the end (delta: 65.0MB). Free memory was 85.7MB in the beginning and 114.9MB in the end (delta: -29.2MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2021-11-12 23:43:21,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 44.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4488.90ms. Allocated memory was 134.2MB in the beginning and 199.2MB in the end (delta: 65.0MB). Free memory was 85.7MB in the beginning and 114.9MB in the end (delta: -29.2MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6667]: 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_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/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_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/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_15a6a300-a93c-446e-9176-54120e0e4059/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 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:24,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:24,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:24,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:24,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:24,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:24,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:24,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:24,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:24,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:24,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:24,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:24,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:24,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:24,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:24,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:24,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:24,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:24,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:24,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:24,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:24,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:24,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:24,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:24,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:24,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:24,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:24,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:24,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:24,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:24,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:24,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:24,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:24,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:24,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:24,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:24,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:24,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:24,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:24,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:24,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:24,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:43:24,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:24,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:24,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:24,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:24,555 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:24,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:24,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:24,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:24,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:24,557 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:24,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:24,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:24,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:24,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:24,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:24,561 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:24,561 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:43:24,561 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:43:24,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:24,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:24,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:24,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:24,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:43:24,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:24,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:24,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:24,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:24,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:24,565 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:43:24,565 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:24,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:24,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:24,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:24,566 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_15a6a300-a93c-446e-9176-54120e0e4059/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2021-11-12 23:43:24,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:24,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:24,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:24,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:24,998 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:24,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-12 23:43:25,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/7872e50b3/12b7c9a86059491ab737fb7d5cb9aaca/FLAG31146f7c4 [2021-11-12 23:43:26,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:26,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-12 23:43:26,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/7872e50b3/12b7c9a86059491ab737fb7d5cb9aaca/FLAG31146f7c4 [2021-11-12 23:43:26,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/data/7872e50b3/12b7c9a86059491ab737fb7d5cb9aaca [2021-11-12 23:43:26,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:26,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:26,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:26,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:26,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:26,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:26" (1/1) ... [2021-11-12 23:43:26,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe160d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:26, skipping insertion in model container [2021-11-12 23:43:26,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:26" (1/1) ... [2021-11-12 23:43:26,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:26,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:31,618 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-12 23:43:31,622 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-12 23:43:31,625 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-12 23:43:31,632 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-12 23:43:31,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:31,725 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:43:31,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:32,208 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-12 23:43:32,209 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-12 23:43:32,209 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-12 23:43:32,210 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-12 23:43:32,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:32,263 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:43:32,759 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-12 23:43:32,760 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-12 23:43:32,761 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-12 23:43:32,761 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_15a6a300-a93c-446e-9176-54120e0e4059/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-12 23:43:32,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:33,332 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:43:33,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33 WrapperNode [2021-11-12 23:43:33,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:33,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:33,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:43:33,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:43:33,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:33,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:33,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:33,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:43:33,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:43:33,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:43:33,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:33,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:33,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:33,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:34,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:34,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:34,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:34,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:43:34,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:43:34,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:43:34,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:43:34,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (1/1) ... [2021-11-12 23:43:34,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:34,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:43:34,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:43:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-12 23:43:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-12 23:43:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:43:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:43:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-12 23:43:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-12 23:43:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:43:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:43:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:43:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:43:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 23:43:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 23:43:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:43:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:43:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-12 23:43:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-12 23:43:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-12 23:43:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-12 23:43:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-12 23:43:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-12 23:43:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2021-11-12 23:43:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2021-11-12 23:43:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-12 23:43:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-12 23:43:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-12 23:43:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-12 23:43:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:43:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:43:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-12 23:43:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-12 23:43:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 23:43:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 23:43:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:43:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:43:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-12 23:43:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-12 23:43:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:43:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:43:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:43:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2021-11-12 23:43:34,285 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2021-11-12 23:43:34,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:43:34,286 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:43:34,286 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:43:34,287 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-12 23:43:34,287 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-12 23:43:34,288 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~X~C_INT~TO~~u16~0 [2021-11-12 23:43:34,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~X~C_INT~TO~~u16~0 [2021-11-12 23:43:34,288 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:43:34,288 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:43:34,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-12 23:43:34,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-12 23:43:34,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:43:34,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:43:34,290 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2021-11-12 23:43:34,290 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2021-11-12 23:43:34,290 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 23:43:34,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 23:43:34,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:43:34,291 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:43:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2021-11-12 23:43:34,292 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2021-11-12 23:43:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-12 23:43:34,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-12 23:43:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:43:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:43:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 23:43:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 23:43:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-12 23:43:34,293 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-12 23:43:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-12 23:43:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-12 23:43:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2021-11-12 23:43:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2021-11-12 23:43:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-12 23:43:34,295 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-12 23:43:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:43:34,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:43:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:43:34,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-12 23:43:34,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-12 23:43:34,297 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2021-11-12 23:43:34,298 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2021-11-12 23:43:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-12 23:43:34,298 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-12 23:43:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:43:34,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:43:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 23:43:34,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 23:43:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:43:34,299 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 23:43:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:43:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:43:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:43:34,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:43:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2021-11-12 23:43:34,301 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2021-11-12 23:43:34,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:43:34,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-12 23:43:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-12 23:43:34,302 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-12 23:43:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-12 23:43:34,302 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2021-11-12 23:43:34,303 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2021-11-12 23:43:34,305 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:43:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:43:34,308 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-12 23:43:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-12 23:43:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:43:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:43:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 23:43:34,311 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 23:43:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:43:34,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:43:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2021-11-12 23:43:34,321 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2021-11-12 23:43:34,321 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:43:34,322 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:43:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:43:34,322 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2021-11-12 23:43:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2021-11-12 23:43:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-12 23:43:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-12 23:43:34,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:43:34,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:43:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:43:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 23:43:34,324 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 23:43:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:43:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:43:34,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:43:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:43:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:43:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:43:34,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:43:34,325 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2021-11-12 23:43:34,326 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2021-11-12 23:43:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:43:34,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:43:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2021-11-12 23:43:34,326 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2021-11-12 23:43:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2021-11-12 23:43:34,328 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2021-11-12 23:43:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-12 23:43:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-12 23:43:34,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-12 23:43:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2021-11-12 23:43:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2021-11-12 23:43:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2021-11-12 23:43:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2021-11-12 23:43:34,329 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-12 23:43:34,329 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-12 23:43:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:43:34,330 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:43:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-12 23:43:34,330 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-12 23:43:34,330 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:43:34,331 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:43:34,331 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-12 23:43:34,331 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-12 23:43:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2021-11-12 23:43:34,332 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2021-11-12 23:43:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2021-11-12 23:43:34,332 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2021-11-12 23:43:34,332 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2021-11-12 23:43:34,333 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2021-11-12 23:43:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2021-11-12 23:43:34,333 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2021-11-12 23:43:34,333 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 23:43:34,334 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 23:43:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2021-11-12 23:43:34,335 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2021-11-12 23:43:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:43:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-12 23:43:34,335 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-12 23:43:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:43:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-12 23:43:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-12 23:43:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:43:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:43:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:43:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:43:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:43:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2021-11-12 23:43:34,337 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2021-11-12 23:43:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2021-11-12 23:43:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2021-11-12 23:43:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-12 23:43:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-12 23:43:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:43:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:43:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2021-11-12 23:43:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2021-11-12 23:43:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:43:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:43:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2021-11-12 23:43:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2021-11-12 23:43:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-12 23:43:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-12 23:43:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-12 23:43:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-12 23:43:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2021-11-12 23:43:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2021-11-12 23:43:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2021-11-12 23:43:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2021-11-12 23:43:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2021-11-12 23:43:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2021-11-12 23:43:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-12 23:43:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-12 23:43:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 23:43:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 23:43:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:43:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:43:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2021-11-12 23:43:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2021-11-12 23:43:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:43:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:43:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2021-11-12 23:43:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2021-11-12 23:43:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2021-11-12 23:43:34,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2021-11-12 23:43:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-12 23:43:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-12 23:43:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:43:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:43:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2021-11-12 23:43:34,346 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2021-11-12 23:43:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:43:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:43:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:43:34,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:43:34,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:43:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:43:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-12 23:43:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-12 23:43:34,353 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-12 23:43:34,353 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-12 23:43:34,353 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2021-11-12 23:43:34,353 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2021-11-12 23:43:34,353 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2021-11-12 23:43:34,354 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2021-11-12 23:43:34,355 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-12 23:43:34,357 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-12 23:43:34,357 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2021-11-12 23:43:34,357 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2021-11-12 23:43:34,358 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~X~C_INT~X~~u16~0~TO~VOID [2021-11-12 23:43:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~X~C_INT~X~~u16~0~TO~VOID [2021-11-12 23:43:34,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:43:34,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:43:34,358 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-12 23:43:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-12 23:43:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-12 23:43:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-12 23:43:34,359 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 23:43:34,359 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 23:43:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:43:34,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:43:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-12 23:43:34,360 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-12 23:43:34,360 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-12 23:43:34,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-12 23:43:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-12 23:43:34,361 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-12 23:43:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:43:34,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:43:34,361 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-12 23:43:34,361 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-12 23:43:37,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:44:48,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:44:48,696 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-12 23:44:48,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:48 BoogieIcfgContainer [2021-11-12 23:44:48,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:44:48,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:44:48,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:44:48,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:44:48,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:43:26" (1/3) ... [2021-11-12 23:44:48,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751da04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:48, skipping insertion in model container [2021-11-12 23:44:48,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:33" (2/3) ... [2021-11-12 23:44:48,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751da04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:48, skipping insertion in model container [2021-11-12 23:44:48,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:48" (3/3) ... [2021-11-12 23:44:48,710 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-12 23:44:48,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:44:48,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-12 23:44:48,776 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:44:48,783 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 [2021-11-12 23:44:48,784 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:44:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 2400 states, 1634 states have (on average 1.281517747858017) internal successors, (2094), 1699 states have internal predecessors, (2094), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) [2021-11-12 23:44:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:44:48,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:48,886 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, 1, 1, 1, 1, 1] [2021-11-12 23:44:48,887 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)] === [2021-11-12 23:44:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1372034921, now seen corresponding path program 1 times [2021-11-12 23:44:48,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:48,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986679884] [2021-11-12 23:44:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:48,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:48,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:48,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:44:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:53,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:44:53,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:53,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:54,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:54,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986679884] [2021-11-12 23:44:54,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986679884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:54,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:54,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:44:54,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025924533] [2021-11-12 23:44:54,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:54,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:44:54,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:44:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:44:54,386 INFO L87 Difference]: Start difference. First operand has 2400 states, 1634 states have (on average 1.281517747858017) internal successors, (2094), 1699 states have internal predecessors, (2094), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-12 23:44:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:58,215 INFO L93 Difference]: Finished difference Result 4755 states and 6828 transitions. [2021-11-12 23:44:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:44:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 57 [2021-11-12 23:44:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:58,280 INFO L225 Difference]: With dead ends: 4755 [2021-11-12 23:44:58,280 INFO L226 Difference]: Without dead ends: 2355 [2021-11-12 23:44:58,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:44:58,322 INFO L933 BasicCegarLoop]: 3313 mSDtfsCounter, 5336 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2506.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5336 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.32ms SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3195.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:58,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5336 Valid, 3313 Invalid, 1283 Unknown, 0 Unchecked, 57.32ms Time], IncrementalHoareTripleChecker [1282 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3195.64ms Time] [2021-11-12 23:44:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-12 23:44:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2021-11-12 23:44:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1599 states have (on average 1.2645403377110693) internal successors, (2022), 1657 states have internal predecessors, (2022), 637 states have call successors, (637), 117 states have call predecessors, (637), 116 states have return successors, (634), 615 states have call predecessors, (634), 634 states have call successors, (634) [2021-11-12 23:44:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3293 transitions. [2021-11-12 23:44:58,647 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3293 transitions. Word has length 57 [2021-11-12 23:44:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3293 transitions. [2021-11-12 23:44:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-12 23:44:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3293 transitions. [2021-11-12 23:44:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:44:58,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:58,654 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, 1, 1, 1, 1, 1] [2021-11-12 23:44:58,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:58,855 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)] === [2021-11-12 23:44:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1384592345, now seen corresponding path program 1 times [2021-11-12 23:44:58,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:58,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419593199] [2021-11-12 23:44:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:58,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:58,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:58,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:58,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:45:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:45:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:45:03,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:45:04,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:04,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419593199] [2021-11-12 23:45:04,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419593199] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:04,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:04,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2021-11-12 23:45:04,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849159818] [2021-11-12 23:45:04,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:04,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:45:04,444 INFO L87 Difference]: Start difference. First operand 2355 states and 3293 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:45:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:08,695 INFO L93 Difference]: Finished difference Result 4848 states and 6809 transitions. [2021-11-12 23:45:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:08,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-12 23:45:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:08,728 INFO L225 Difference]: With dead ends: 4848 [2021-11-12 23:45:08,728 INFO L226 Difference]: Without dead ends: 2704 [2021-11-12 23:45:08,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:08,743 INFO L933 BasicCegarLoop]: 3347 mSDtfsCounter, 764 mSDsluCounter, 19962 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3237.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 23309 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 79.84ms SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3401.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:08,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 23309 Invalid, 649 Unknown, 0 Unchecked, 79.84ms Time], IncrementalHoareTripleChecker [213 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 3401.11ms Time] [2021-11-12 23:45:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-11-12 23:45:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2358. [2021-11-12 23:45:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 1602 states have (on average 1.2640449438202248) internal successors, (2025), 1660 states have internal predecessors, (2025), 637 states have call successors, (637), 117 states have call predecessors, (637), 116 states have return successors, (634), 615 states have call predecessors, (634), 634 states have call successors, (634) [2021-11-12 23:45:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 3296 transitions. [2021-11-12 23:45:08,962 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 3296 transitions. Word has length 57 [2021-11-12 23:45:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 3296 transitions. [2021-11-12 23:45:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:45:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 3296 transitions. [2021-11-12 23:45:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:45:08,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:08,973 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, 1, 1, 1, 1, 1] [2021-11-12 23:45:09,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:09,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:09,187 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)] === [2021-11-12 23:45:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2066369449, now seen corresponding path program 1 times [2021-11-12 23:45:09,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:09,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954887954] [2021-11-12 23:45:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:09,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:09,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:09,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:09,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:45:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:45:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:45:13,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:14,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:14,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954887954] [2021-11-12 23:45:14,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954887954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:14,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:14,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:45:14,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512353669] [2021-11-12 23:45:14,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:14,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:45:14,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:45:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:45:14,360 INFO L87 Difference]: Start difference. First operand 2358 states and 3296 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:45:16,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:17,077 INFO L93 Difference]: Finished difference Result 4505 states and 6166 transitions. [2021-11-12 23:45:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:45:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 57 [2021-11-12 23:45:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:17,129 INFO L225 Difference]: With dead ends: 4505 [2021-11-12 23:45:17,130 INFO L226 Difference]: Without dead ends: 3962 [2021-11-12 23:45:17,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:45:17,145 INFO L933 BasicCegarLoop]: 3947 mSDtfsCounter, 2196 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2344.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 7195 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2416.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:17,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 7195 Invalid, 17 Unknown, 0 Unchecked, 25.44ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2416.56ms Time] [2021-11-12 23:45:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2021-11-12 23:45:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3928. [2021-11-12 23:45:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 2658 states have (on average 1.2607223476297968) internal successors, (3351), 2753 states have internal predecessors, (3351), 1045 states have call successors, (1045), 223 states have call predecessors, (1045), 222 states have return successors, (1044), 1007 states have call predecessors, (1044), 1042 states have call successors, (1044) [2021-11-12 23:45:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5440 transitions. [2021-11-12 23:45:17,580 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5440 transitions. Word has length 57 [2021-11-12 23:45:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:17,581 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5440 transitions. [2021-11-12 23:45:17,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:45:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5440 transitions. [2021-11-12 23:45:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:45:17,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:17,583 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, 1, 1, 1, 1, 1] [2021-11-12 23:45:17,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:17,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:17,799 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)] === [2021-11-12 23:45:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1993982891, now seen corresponding path program 1 times [2021-11-12 23:45:17,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:17,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358698216] [2021-11-12 23:45:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:17,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:17,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:17,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:45:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:21,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:45:22,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:22,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358698216] [2021-11-12 23:45:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358698216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:22,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:45:22,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756636597] [2021-11-12 23:45:22,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:22,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:22,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:45:22,950 INFO L87 Difference]: Start difference. First operand 3928 states and 5440 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:45:26,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:30,422 INFO L93 Difference]: Finished difference Result 6298 states and 8463 transitions. [2021-11-12 23:45:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 57 [2021-11-12 23:45:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:30,471 INFO L225 Difference]: With dead ends: 6298 [2021-11-12 23:45:30,472 INFO L226 Difference]: Without dead ends: 5756 [2021-11-12 23:45:30,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:45:30,479 INFO L933 BasicCegarLoop]: 4091 mSDtfsCounter, 4207 mSDsluCounter, 3627 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 858 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6343.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 7718 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.56ms SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6941.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:30,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 7718 Invalid, 1175 Unknown, 0 Unchecked, 35.56ms Time], IncrementalHoareTripleChecker [858 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 6941.93ms Time] [2021-11-12 23:45:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5756 states. [2021-11-12 23:45:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5756 to 5185. [2021-11-12 23:45:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 3481 states have (on average 1.2487790864694053) internal successors, (4347), 3610 states have internal predecessors, (4347), 1359 states have call successors, (1359), 343 states have call predecessors, (1359), 342 states have return successors, (1359), 1302 states have call predecessors, (1359), 1356 states have call successors, (1359) [2021-11-12 23:45:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7065 transitions. [2021-11-12 23:45:30,923 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7065 transitions. Word has length 57 [2021-11-12 23:45:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:30,925 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 7065 transitions. [2021-11-12 23:45:30,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-12 23:45:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7065 transitions. [2021-11-12 23:45:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:45:30,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:30,930 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, 1, 1, 1, 1, 1] [2021-11-12 23:45:30,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:31,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,150 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)] === [2021-11-12 23:45:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2026224791, now seen corresponding path program 1 times [2021-11-12 23:45:31,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:31,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442171729] [2021-11-12 23:45:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:31,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:31,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:31,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:45:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:34,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:36,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:36,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442171729] [2021-11-12 23:45:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442171729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:36,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:36,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:45:36,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986695979] [2021-11-12 23:45:36,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:36,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:36,279 INFO L87 Difference]: Start difference. First operand 5185 states and 7065 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-12 23:45:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:37,001 INFO L93 Difference]: Finished difference Result 5225 states and 7103 transitions. [2021-11-12 23:45:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:37,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 57 [2021-11-12 23:45:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:37,046 INFO L225 Difference]: With dead ends: 5225 [2021-11-12 23:45:37,047 INFO L226 Difference]: Without dead ends: 5223 [2021-11-12 23:45:37,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:37,052 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3236 mSDsluCounter, 6620 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3248 SdHoareTripleChecker+Valid, 9914 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:37,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3248 Valid, 9914 Invalid, 24 Unknown, 0 Unchecked, 27.05ms Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 166.79ms Time] [2021-11-12 23:45:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-11-12 23:45:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 5221. [2021-11-12 23:45:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 3505 states have (on average 1.2479315263908701) internal successors, (4374), 3636 states have internal predecessors, (4374), 1363 states have call successors, (1363), 351 states have call predecessors, (1363), 350 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-12 23:45:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 7100 transitions. [2021-11-12 23:45:37,451 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 7100 transitions. Word has length 57 [2021-11-12 23:45:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:37,452 INFO L470 AbstractCegarLoop]: Abstraction has 5221 states and 7100 transitions. [2021-11-12 23:45:37,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-12 23:45:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 7100 transitions. [2021-11-12 23:45:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:45:37,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:37,455 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, 1, 1, 1, 1, 1] [2021-11-12 23:45:37,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:37,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:37,679 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)] === [2021-11-12 23:45:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 532746433, now seen corresponding path program 1 times [2021-11-12 23:45:37,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:37,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240034457] [2021-11-12 23:45:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:37,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:37,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:37,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:45:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:41,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:42,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:45:43,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:43,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240034457] [2021-11-12 23:45:43,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240034457] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:43,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:43,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:43,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726573628] [2021-11-12 23:45:43,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:43,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:43,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:43,132 INFO L87 Difference]: Start difference. First operand 5221 states and 7100 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:45:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:43,907 INFO L93 Difference]: Finished difference Result 5227 states and 7105 transitions. [2021-11-12 23:45:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 62 [2021-11-12 23:45:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:43,969 INFO L225 Difference]: With dead ends: 5227 [2021-11-12 23:45:43,969 INFO L226 Difference]: Without dead ends: 5225 [2021-11-12 23:45:43,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:43,977 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3266 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:43,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3266 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 27.47ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 158.71ms Time] [2021-11-12 23:45:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-11-12 23:45:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 5225. [2021-11-12 23:45:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 3508 states have (on average 1.2477194982896238) internal successors, (4377), 3639 states have internal predecessors, (4377), 1363 states have call successors, (1363), 352 states have call predecessors, (1363), 351 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-12 23:45:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 7103 transitions. [2021-11-12 23:45:44,561 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 7103 transitions. Word has length 62 [2021-11-12 23:45:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:44,562 INFO L470 AbstractCegarLoop]: Abstraction has 5225 states and 7103 transitions. [2021-11-12 23:45:44,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:45:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 7103 transitions. [2021-11-12 23:45:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:45:44,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:44,565 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, 1, 1, 1, 1, 1] [2021-11-12 23:45:44,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:44,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:44,779 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)] === [2021-11-12 23:45:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1387917865, now seen corresponding path program 1 times [2021-11-12 23:45:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159442007] [2021-11-12 23:45:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:44,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:44,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:44,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:45:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:48,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:49,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:49,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:49,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159442007] [2021-11-12 23:45:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159442007] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:49,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:49,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:49,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860981556] [2021-11-12 23:45:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:49,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:49,929 INFO L87 Difference]: Start difference. First operand 5225 states and 7103 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:45:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:50,662 INFO L93 Difference]: Finished difference Result 5231 states and 7108 transitions. [2021-11-12 23:45:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 67 [2021-11-12 23:45:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:50,736 INFO L225 Difference]: With dead ends: 5231 [2021-11-12 23:45:50,736 INFO L226 Difference]: Without dead ends: 5229 [2021-11-12 23:45:50,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:50,743 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3265 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:50,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3265 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 22.90ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 122.17ms Time] [2021-11-12 23:45:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-11-12 23:45:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 5229. [2021-11-12 23:45:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 3511 states have (on average 1.2475078325263458) internal successors, (4380), 3642 states have internal predecessors, (4380), 1363 states have call successors, (1363), 353 states have call predecessors, (1363), 352 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-12 23:45:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 7106 transitions. [2021-11-12 23:45:51,214 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 7106 transitions. Word has length 67 [2021-11-12 23:45:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:51,214 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 7106 transitions. [2021-11-12 23:45:51,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:45:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 7106 transitions. [2021-11-12 23:45:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:45:51,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:51,216 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-12 23:45:51,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:51,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:51,433 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)] === [2021-11-12 23:45:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1333177128, now seen corresponding path program 1 times [2021-11-12 23:45:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:51,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964462723] [2021-11-12 23:45:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:51,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:51,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:51,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:45:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:45:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:56,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:59,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:59,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964462723] [2021-11-12 23:45:59,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964462723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:59,385 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:59,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-12 23:45:59,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869210362] [2021-11-12 23:45:59,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:59,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 23:45:59,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 23:45:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:45:59,388 INFO L87 Difference]: Start difference. First operand 5229 states and 7106 transitions. Second operand has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-12 23:46:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:05,747 INFO L93 Difference]: Finished difference Result 5645 states and 7582 transitions. [2021-11-12 23:46:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:46:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 83 [2021-11-12 23:46:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:05,776 INFO L225 Difference]: With dead ends: 5645 [2021-11-12 23:46:05,776 INFO L226 Difference]: Without dead ends: 4611 [2021-11-12 23:46:05,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:46:05,787 INFO L933 BasicCegarLoop]: 3249 mSDtfsCounter, 34 mSDsluCounter, 48647 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4877.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 51896 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.02ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5027.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:05,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 51896 Invalid, 866 Unknown, 0 Unchecked, 61.02ms Time], IncrementalHoareTripleChecker [34 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 5027.20ms Time] [2021-11-12 23:46:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-11-12 23:46:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 4606. [2021-11-12 23:46:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 3114 states have (on average 1.2549775208734746) internal successors, (3908), 3222 states have internal predecessors, (3908), 1190 states have call successors, (1190), 300 states have call predecessors, (1190), 299 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-12 23:46:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 6288 transitions. [2021-11-12 23:46:06,187 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 6288 transitions. Word has length 83 [2021-11-12 23:46:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 4606 states and 6288 transitions. [2021-11-12 23:46:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-12 23:46:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 6288 transitions. [2021-11-12 23:46:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:46:06,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:06,195 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, 1, 1, 1, 1, 1] [2021-11-12 23:46:06,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:06,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:06,411 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)] === [2021-11-12 23:46:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash -558184063, now seen corresponding path program 1 times [2021-11-12 23:46:06,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:06,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269684933] [2021-11-12 23:46:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:06,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:06,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:06,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:46:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:10,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:11,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:11,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:11,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269684933] [2021-11-12 23:46:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269684933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:11,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:11,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:11,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414939417] [2021-11-12 23:46:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:11,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:11,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:11,902 INFO L87 Difference]: Start difference. First operand 4606 states and 6288 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:12,505 INFO L93 Difference]: Finished difference Result 4612 states and 6293 transitions. [2021-11-12 23:46:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 72 [2021-11-12 23:46:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:12,532 INFO L225 Difference]: With dead ends: 4612 [2021-11-12 23:46:12,532 INFO L226 Difference]: Without dead ends: 4610 [2021-11-12 23:46:12,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:12,537 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3264 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:12,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3264 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 14.72ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 126.75ms Time] [2021-11-12 23:46:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-12 23:46:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-12 23:46:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 3117 states have (on average 1.2547321142123837) internal successors, (3911), 3225 states have internal predecessors, (3911), 1190 states have call successors, (1190), 301 states have call predecessors, (1190), 300 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-12 23:46:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6291 transitions. [2021-11-12 23:46:13,016 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6291 transitions. Word has length 72 [2021-11-12 23:46:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:13,018 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 6291 transitions. [2021-11-12 23:46:13,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6291 transitions. [2021-11-12 23:46:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:46:13,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:13,021 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] [2021-11-12 23:46:13,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:13,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:13,247 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)] === [2021-11-12 23:46:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1257234665, now seen corresponding path program 1 times [2021-11-12 23:46:13,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:13,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500000225] [2021-11-12 23:46:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:13,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:13,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:13,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:46:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:46:17,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:46:18,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:18,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500000225] [2021-11-12 23:46:18,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500000225] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:18,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:18,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:18,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038969491] [2021-11-12 23:46:18,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:18,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:18,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:18,570 INFO L87 Difference]: Start difference. First operand 4610 states and 6291 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:46:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:19,097 INFO L93 Difference]: Finished difference Result 4616 states and 6296 transitions. [2021-11-12 23:46:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2021-11-12 23:46:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:19,113 INFO L225 Difference]: With dead ends: 4616 [2021-11-12 23:46:19,113 INFO L226 Difference]: Without dead ends: 4614 [2021-11-12 23:46:19,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:19,117 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3263 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:19,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3263 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 11.07ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 118.64ms Time] [2021-11-12 23:46:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2021-11-12 23:46:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4614. [2021-11-12 23:46:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4614 states, 3120 states have (on average 1.2544871794871795) internal successors, (3914), 3228 states have internal predecessors, (3914), 1190 states have call successors, (1190), 302 states have call predecessors, (1190), 301 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-12 23:46:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 6294 transitions. [2021-11-12 23:46:19,509 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 6294 transitions. Word has length 77 [2021-11-12 23:46:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:19,509 INFO L470 AbstractCegarLoop]: Abstraction has 4614 states and 6294 transitions. [2021-11-12 23:46:19,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:46:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 6294 transitions. [2021-11-12 23:46:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:46:19,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:19,512 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, 1, 1, 1, 1, 1] [2021-11-12 23:46:19,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:19,737 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)] === [2021-11-12 23:46:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 686178881, now seen corresponding path program 1 times [2021-11-12 23:46:19,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:19,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281118666] [2021-11-12 23:46:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:19,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:19,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:19,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:46:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:46:24,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:46:25,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:25,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281118666] [2021-11-12 23:46:25,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281118666] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:25,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:25,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:25,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315191824] [2021-11-12 23:46:25,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:25,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:25,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:25,347 INFO L87 Difference]: Start difference. First operand 4614 states and 6294 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:25,929 INFO L93 Difference]: Finished difference Result 4620 states and 6299 transitions. [2021-11-12 23:46:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 82 [2021-11-12 23:46:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:25,956 INFO L225 Difference]: With dead ends: 4620 [2021-11-12 23:46:25,957 INFO L226 Difference]: Without dead ends: 4618 [2021-11-12 23:46:25,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:25,962 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:25,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3262 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 13.50ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 125.29ms Time] [2021-11-12 23:46:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4618 states. [2021-11-12 23:46:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4618 to 4618. [2021-11-12 23:46:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 3123 states have (on average 1.2542427153378162) internal successors, (3917), 3231 states have internal predecessors, (3917), 1190 states have call successors, (1190), 303 states have call predecessors, (1190), 302 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-12 23:46:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 6297 transitions. [2021-11-12 23:46:26,413 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 6297 transitions. Word has length 82 [2021-11-12 23:46:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:26,413 INFO L470 AbstractCegarLoop]: Abstraction has 4618 states and 6297 transitions. [2021-11-12 23:46:26,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 6297 transitions. [2021-11-12 23:46:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:46:26,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:26,416 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] [2021-11-12 23:46:26,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:26,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:26,639 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)] === [2021-11-12 23:46:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1324609623, now seen corresponding path program 1 times [2021-11-12 23:46:26,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:26,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370774183] [2021-11-12 23:46:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:26,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:26,646 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:26,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:46:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:46:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:46:32,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:32,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370774183] [2021-11-12 23:46:32,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370774183] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:32,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:32,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:32,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094193883] [2021-11-12 23:46:32,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:32,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:32,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:32,165 INFO L87 Difference]: Start difference. First operand 4618 states and 6297 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:32,741 INFO L93 Difference]: Finished difference Result 4624 states and 6302 transitions. [2021-11-12 23:46:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 87 [2021-11-12 23:46:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:32,762 INFO L225 Difference]: With dead ends: 4624 [2021-11-12 23:46:32,763 INFO L226 Difference]: Without dead ends: 4622 [2021-11-12 23:46:32,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:32,766 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3261 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:32,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3261 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 12.30ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 111.78ms Time] [2021-11-12 23:46:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4622 states. [2021-11-12 23:46:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4622 to 4622. [2021-11-12 23:46:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 3126 states have (on average 1.253998720409469) internal successors, (3920), 3234 states have internal predecessors, (3920), 1190 states have call successors, (1190), 304 states have call predecessors, (1190), 303 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-12 23:46:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 6300 transitions. [2021-11-12 23:46:33,219 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 6300 transitions. Word has length 87 [2021-11-12 23:46:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 4622 states and 6300 transitions. [2021-11-12 23:46:33,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 6300 transitions. [2021-11-12 23:46:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:46:33,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:33,222 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, 1, 1, 1, 1, 1] [2021-11-12 23:46:33,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:33,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:33,435 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)] === [2021-11-12 23:46:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash -82609407, now seen corresponding path program 1 times [2021-11-12 23:46:33,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:33,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830822135] [2021-11-12 23:46:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:33,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:33,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:33,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:33,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:46:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:46:38,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:46:39,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:39,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830822135] [2021-11-12 23:46:39,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830822135] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:39,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:39,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:39,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913063634] [2021-11-12 23:46:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:39,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:39,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:39,009 INFO L87 Difference]: Start difference. First operand 4622 states and 6300 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:39,655 INFO L93 Difference]: Finished difference Result 5216 states and 6982 transitions. [2021-11-12 23:46:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 92 [2021-11-12 23:46:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:39,681 INFO L225 Difference]: With dead ends: 5216 [2021-11-12 23:46:39,682 INFO L226 Difference]: Without dead ends: 5214 [2021-11-12 23:46:39,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:39,687 INFO L933 BasicCegarLoop]: 3372 mSDtfsCounter, 1955 mSDsluCounter, 8374 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 11746 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:39,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1960 Valid, 11746 Invalid, 23 Unknown, 0 Unchecked, 17.12ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 118.18ms Time] [2021-11-12 23:46:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-12 23:46:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5212. [2021-11-12 23:46:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 3486 states have (on average 1.24469305794607) internal successors, (4339), 3610 states have internal predecessors, (4339), 1320 states have call successors, (1320), 404 states have call predecessors, (1320), 403 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-12 23:46:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 6979 transitions. [2021-11-12 23:46:40,300 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 6979 transitions. Word has length 92 [2021-11-12 23:46:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:40,300 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 6979 transitions. [2021-11-12 23:46:40,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 6979 transitions. [2021-11-12 23:46:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:46:40,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:40,305 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, 1, 1, 1, 1, 1] [2021-11-12 23:46:40,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:40,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:40,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:46:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash 171867753, now seen corresponding path program 1 times [2021-11-12 23:46:40,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:40,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116745729] [2021-11-12 23:46:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:40,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:40,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:40,523 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:40,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:46:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:46:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:46:46,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116745729] [2021-11-12 23:46:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116745729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:46,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:46,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:46,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125644413] [2021-11-12 23:46:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:46,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:46,781 INFO L87 Difference]: Start difference. First operand 5212 states and 6979 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:47,425 INFO L93 Difference]: Finished difference Result 5218 states and 6984 transitions. [2021-11-12 23:46:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 97 [2021-11-12 23:46:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:47,447 INFO L225 Difference]: With dead ends: 5218 [2021-11-12 23:46:47,447 INFO L226 Difference]: Without dead ends: 5216 [2021-11-12 23:46:47,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:47,452 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3259 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:47,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3259 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 12.63ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 122.57ms Time] [2021-11-12 23:46:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-11-12 23:46:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 5216. [2021-11-12 23:46:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5216 states, 3489 states have (on average 1.2444826597879048) internal successors, (4342), 3613 states have internal predecessors, (4342), 1320 states have call successors, (1320), 405 states have call predecessors, (1320), 404 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-12 23:46:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6982 transitions. [2021-11-12 23:46:47,998 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6982 transitions. Word has length 97 [2021-11-12 23:46:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 5216 states and 6982 transitions. [2021-11-12 23:46:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:46:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6982 transitions. [2021-11-12 23:46:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:46:48,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:48,002 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] [2021-11-12 23:46:48,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:48,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:48,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:46:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1911393343, now seen corresponding path program 1 times [2021-11-12 23:46:48,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:48,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071558894] [2021-11-12 23:46:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:48,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:48,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:48,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:46:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:46:53,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:46:54,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:54,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071558894] [2021-11-12 23:46:54,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071558894] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:54,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:54,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:54,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976269003] [2021-11-12 23:46:54,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:54,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:54,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:54,527 INFO L87 Difference]: Start difference. First operand 5216 states and 6982 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:46:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:55,145 INFO L93 Difference]: Finished difference Result 5222 states and 6987 transitions. [2021-11-12 23:46:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 102 [2021-11-12 23:46:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:55,162 INFO L225 Difference]: With dead ends: 5222 [2021-11-12 23:46:55,162 INFO L226 Difference]: Without dead ends: 5220 [2021-11-12 23:46:55,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:55,166 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3258 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:55,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3258 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 11.10ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 119.30ms Time] [2021-11-12 23:46:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-11-12 23:46:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5220. [2021-11-12 23:46:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 3492 states have (on average 1.2442726231386025) internal successors, (4345), 3616 states have internal predecessors, (4345), 1320 states have call successors, (1320), 406 states have call predecessors, (1320), 405 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-12 23:46:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6985 transitions. [2021-11-12 23:46:55,767 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6985 transitions. Word has length 102 [2021-11-12 23:46:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:55,770 INFO L470 AbstractCegarLoop]: Abstraction has 5220 states and 6985 transitions. [2021-11-12 23:46:55,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:46:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6985 transitions. [2021-11-12 23:46:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:46:55,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:55,773 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, 1, 1, 1, 1, 1] [2021-11-12 23:46:55,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:55,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:55,990 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:46:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash 532098345, now seen corresponding path program 1 times [2021-11-12 23:46:55,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:55,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946368496] [2021-11-12 23:46:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:55,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:55,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:55,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:56,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:46:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:59,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:47:01,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:47:01,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:01,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946368496] [2021-11-12 23:47:01,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946368496] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:01,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:01,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:47:01,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359061984] [2021-11-12 23:47:01,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:01,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:47:01,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:47:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:47:01,996 INFO L87 Difference]: Start difference. First operand 5220 states and 6985 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:47:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:02,710 INFO L93 Difference]: Finished difference Result 5226 states and 6990 transitions. [2021-11-12 23:47:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 107 [2021-11-12 23:47:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:02,730 INFO L225 Difference]: With dead ends: 5226 [2021-11-12 23:47:02,730 INFO L226 Difference]: Without dead ends: 5224 [2021-11-12 23:47:02,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:02,734 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.34ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:02,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3257 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 13.34ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 129.10ms Time] [2021-11-12 23:47:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2021-11-12 23:47:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5224. [2021-11-12 23:47:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5224 states, 3495 states have (on average 1.2440629470672389) internal successors, (4348), 3619 states have internal predecessors, (4348), 1320 states have call successors, (1320), 407 states have call predecessors, (1320), 406 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-12 23:47:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 6988 transitions. [2021-11-12 23:47:03,332 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 6988 transitions. Word has length 107 [2021-11-12 23:47:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:03,334 INFO L470 AbstractCegarLoop]: Abstraction has 5224 states and 6988 transitions. [2021-11-12 23:47:03,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:47:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 6988 transitions. [2021-11-12 23:47:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:47:03,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:03,337 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, 1, 1, 1, 1, 1] [2021-11-12 23:47:03,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:03,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:03,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:47:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1454582913, now seen corresponding path program 1 times [2021-11-12 23:47:03,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:03,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511842489] [2021-11-12 23:47:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:03,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:03,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:03,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:47:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:47:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 23:47:08,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 23:47:09,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:09,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511842489] [2021-11-12 23:47:09,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511842489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:09,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:09,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:47:09,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744604120] [2021-11-12 23:47:09,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:09,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:47:09,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:47:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:47:09,845 INFO L87 Difference]: Start difference. First operand 5224 states and 6988 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:47:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:10,648 INFO L93 Difference]: Finished difference Result 5230 states and 6993 transitions. [2021-11-12 23:47:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 112 [2021-11-12 23:47:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:10,667 INFO L225 Difference]: With dead ends: 5230 [2021-11-12 23:47:10,667 INFO L226 Difference]: Without dead ends: 5226 [2021-11-12 23:47:10,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:10,672 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:10,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3256 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 125.73ms Time] [2021-11-12 23:47:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-11-12 23:47:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5226. [2021-11-12 23:47:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3497 states have (on average 1.2436374034887046) internal successors, (4349), 3620 states have internal predecessors, (4349), 1320 states have call successors, (1320), 408 states have call predecessors, (1320), 406 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-12 23:47:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 6989 transitions. [2021-11-12 23:47:11,409 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 6989 transitions. Word has length 112 [2021-11-12 23:47:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:11,410 INFO L470 AbstractCegarLoop]: Abstraction has 5226 states and 6989 transitions. [2021-11-12 23:47:11,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-12 23:47:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 6989 transitions. [2021-11-12 23:47:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:47:11,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:11,415 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2021-11-12 23:47:11,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:11,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:11,631 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:47:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -22668311, now seen corresponding path program 1 times [2021-11-12 23:47:11,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:11,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962450062] [2021-11-12 23:47:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:11,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:11,637 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:11,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:47:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:47:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:47:16,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:47:17,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:17,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962450062] [2021-11-12 23:47:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962450062] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:17,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:47:17,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163645799] [2021-11-12 23:47:17,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:17,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:47:17,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:47:17,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:47:17,682 INFO L87 Difference]: Start difference. First operand 5226 states and 6989 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:47:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:18,346 INFO L93 Difference]: Finished difference Result 5226 states and 6989 transitions. [2021-11-12 23:47:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 117 [2021-11-12 23:47:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:18,357 INFO L225 Difference]: With dead ends: 5226 [2021-11-12 23:47:18,358 INFO L226 Difference]: Without dead ends: 5115 [2021-11-12 23:47:18,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:18,361 INFO L933 BasicCegarLoop]: 3291 mSDtfsCounter, 3251 mSDsluCounter, 6565 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3251 SdHoareTripleChecker+Valid, 9856 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:18,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3251 Valid, 9856 Invalid, 16 Unknown, 0 Unchecked, 12.59ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 92.32ms Time] [2021-11-12 23:47:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2021-11-12 23:47:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 5115. [2021-11-12 23:47:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 3426 states have (on average 1.246059544658494) internal successors, (4269), 3544 states have internal predecessors, (4269), 1296 states have call successors, (1296), 391 states have call predecessors, (1296), 391 states have return successors, (1299), 1246 states have call predecessors, (1299), 1296 states have call successors, (1299) [2021-11-12 23:47:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 6864 transitions. [2021-11-12 23:47:18,823 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 6864 transitions. Word has length 117 [2021-11-12 23:47:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:18,824 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 6864 transitions. [2021-11-12 23:47:18,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:47:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 6864 transitions. [2021-11-12 23:47:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:47:18,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:18,857 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] [2021-11-12 23:47:18,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:19,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:19,058 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)] === [2021-11-12 23:47:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033297, now seen corresponding path program 1 times [2021-11-12 23:47:19,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:19,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497515335] [2021-11-12 23:47:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:19,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:19,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:47:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:22,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:47:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:47:24,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:47:25,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:25,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497515335] [2021-11-12 23:47:25,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497515335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:25,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145182575] [2021-11-12 23:47:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:25,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:25,540 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:25,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:47:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:29,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:47:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 23:47:31,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-12 23:47:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145182575] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:32,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:47:32,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-12 23:47:32,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653934608] [2021-11-12 23:47:32,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:32,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:32,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:47:32,431 INFO L87 Difference]: Start difference. First operand 5115 states and 6864 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:47:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:33,260 INFO L93 Difference]: Finished difference Result 10386 states and 13965 transitions. [2021-11-12 23:47:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 144 [2021-11-12 23:47:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:33,276 INFO L225 Difference]: With dead ends: 10386 [2021-11-12 23:47:33,277 INFO L226 Difference]: Without dead ends: 5294 [2021-11-12 23:47:33,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:47:33,313 INFO L933 BasicCegarLoop]: 3320 mSDtfsCounter, 250 mSDsluCounter, 13067 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 16387 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:33,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 16387 Invalid, 12 Unknown, 0 Unchecked, 19.53ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 122.84ms Time] [2021-11-12 23:47:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2021-11-12 23:47:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 5115. [2021-11-12 23:47:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 3426 states have (on average 1.2457676590776416) internal successors, (4268), 3543 states have internal predecessors, (4268), 1296 states have call successors, (1296), 391 states have call predecessors, (1296), 391 states have return successors, (1299), 1246 states have call predecessors, (1299), 1296 states have call successors, (1299) [2021-11-12 23:47:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 6863 transitions. [2021-11-12 23:47:33,852 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 6863 transitions. Word has length 144 [2021-11-12 23:47:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:33,853 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 6863 transitions. [2021-11-12 23:47:33,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:47:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 6863 transitions. [2021-11-12 23:47:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:47:33,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:33,862 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] [2021-11-12 23:47:33,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:34,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:34,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:34,279 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)] === [2021-11-12 23:47:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash 767865998, now seen corresponding path program 1 times [2021-11-12 23:47:34,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:34,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838291649] [2021-11-12 23:47:34,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:34,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:34,284 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:34,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:47:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:47:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-12 23:47:39,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-12 23:47:42,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:42,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838291649] [2021-11-12 23:47:42,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838291649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:42,225 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:42,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-12 23:47:42,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613926700] [2021-11-12 23:47:42,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:42,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 23:47:42,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 23:47:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:47:42,228 INFO L87 Difference]: Start difference. First operand 5115 states and 6863 transitions. Second operand has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 23:47:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:55,012 INFO L93 Difference]: Finished difference Result 11478 states and 15584 transitions. [2021-11-12 23:47:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 23:47:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 148 [2021-11-12 23:47:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:55,034 INFO L225 Difference]: With dead ends: 11478 [2021-11-12 23:47:55,034 INFO L226 Difference]: Without dead ends: 6386 [2021-11-12 23:47:55,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:47:55,062 INFO L933 BasicCegarLoop]: 3755 mSDtfsCounter, 2250 mSDsluCounter, 53264 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8469.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 57019 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.21ms SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8863.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:55,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2311 Valid, 57019 Invalid, 2440 Unknown, 0 Unchecked, 76.21ms Time], IncrementalHoareTripleChecker [1117 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 8863.54ms Time] [2021-11-12 23:47:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-11-12 23:47:55,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5133. [2021-11-12 23:47:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 3440 states have (on average 1.244767441860465) internal successors, (4282), 3555 states have internal predecessors, (4282), 1300 states have call successors, (1300), 391 states have call predecessors, (1300), 391 states have return successors, (1303), 1250 states have call predecessors, (1303), 1300 states have call successors, (1303) [2021-11-12 23:47:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 6885 transitions. [2021-11-12 23:47:55,821 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 6885 transitions. Word has length 148 [2021-11-12 23:47:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 5133 states and 6885 transitions. [2021-11-12 23:47:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-12 23:47:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 6885 transitions. [2021-11-12 23:47:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-12 23:47:55,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:55,830 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:55,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:56,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:56,056 INFO L402 AbstractCegarLoop]: === Iteration 21 === 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)] === [2021-11-12 23:47:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1808411766, now seen corresponding path program 1 times [2021-11-12 23:47:56,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:56,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26637939] [2021-11-12 23:47:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:56,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:56,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:56,063 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:56,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:48:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:48:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-12 23:48:02,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-12 23:48:04,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:04,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26637939] [2021-11-12 23:48:04,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26637939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:04,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:04,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-12 23:48:04,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463331837] [2021-11-12 23:48:04,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:04,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:48:04,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:48:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:48:04,246 INFO L87 Difference]: Start difference. First operand 5133 states and 6885 transitions. Second operand has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-12 23:48:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:05,642 INFO L93 Difference]: Finished difference Result 11036 states and 14925 transitions. [2021-11-12 23:48:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:48:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) Word has length 231 [2021-11-12 23:48:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:05,660 INFO L225 Difference]: With dead ends: 11036 [2021-11-12 23:48:05,661 INFO L226 Difference]: Without dead ends: 5930 [2021-11-12 23:48:05,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:48:05,682 INFO L933 BasicCegarLoop]: 3710 mSDtfsCounter, 319 mSDsluCounter, 25354 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 647.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 29064 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 712.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:05,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 29064 Invalid, 93 Unknown, 0 Unchecked, 30.13ms Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 712.94ms Time] [2021-11-12 23:48:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2021-11-12 23:48:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5147. [2021-11-12 23:48:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5147 states, 3450 states have (on average 1.2440579710144928) internal successors, (4292), 3565 states have internal predecessors, (4292), 1300 states have call successors, (1300), 391 states have call predecessors, (1300), 395 states have return successors, (1312), 1254 states have call predecessors, (1312), 1300 states have call successors, (1312) [2021-11-12 23:48:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 6904 transitions. [2021-11-12 23:48:06,322 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 6904 transitions. Word has length 231 [2021-11-12 23:48:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:06,323 INFO L470 AbstractCegarLoop]: Abstraction has 5147 states and 6904 transitions. [2021-11-12 23:48:06,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-12 23:48:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 6904 transitions. [2021-11-12 23:48:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-12 23:48:06,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:06,328 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:06,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:06,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:06,543 INFO L402 AbstractCegarLoop]: === Iteration 22 === 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)] === [2021-11-12 23:48:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1427956104, now seen corresponding path program 1 times [2021-11-12 23:48:06,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:06,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127271372] [2021-11-12 23:48:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:06,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:06,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:06,559 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:06,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:48:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:48:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-12 23:48:11,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-12 23:48:13,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:13,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127271372] [2021-11-12 23:48:13,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127271372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:13,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:13,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:48:13,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680330319] [2021-11-12 23:48:13,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:13,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:48:13,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:48:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:48:13,044 INFO L87 Difference]: Start difference. First operand 5147 states and 6904 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:48:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:14,899 INFO L93 Difference]: Finished difference Result 9866 states and 13405 transitions. [2021-11-12 23:48:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:48:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) Word has length 247 [2021-11-12 23:48:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:14,915 INFO L225 Difference]: With dead ends: 9866 [2021-11-12 23:48:14,915 INFO L226 Difference]: Without dead ends: 4746 [2021-11-12 23:48:14,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:48:14,928 INFO L933 BasicCegarLoop]: 3787 mSDtfsCounter, 1081 mSDsluCounter, 24247 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 914.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 28034 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.26ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 991.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:14,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 28034 Invalid, 190 Unknown, 0 Unchecked, 34.26ms Time], IncrementalHoareTripleChecker [67 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 991.53ms Time] [2021-11-12 23:48:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-11-12 23:48:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3948. [2021-11-12 23:48:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 2672 states have (on average 1.25187125748503) internal successors, (3345), 2761 states have internal predecessors, (3345), 982 states have call successors, (982), 287 states have call predecessors, (982), 292 states have return successors, (999), 948 states have call predecessors, (999), 982 states have call successors, (999) [2021-11-12 23:48:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 5326 transitions. [2021-11-12 23:48:15,389 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 5326 transitions. Word has length 247 [2021-11-12 23:48:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:15,390 INFO L470 AbstractCegarLoop]: Abstraction has 3948 states and 5326 transitions. [2021-11-12 23:48:15,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-12 23:48:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 5326 transitions. [2021-11-12 23:48:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 23:48:15,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:15,398 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:15,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:15,619 INFO L402 AbstractCegarLoop]: === Iteration 23 === 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)] === [2021-11-12 23:48:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1499552367, now seen corresponding path program 1 times [2021-11-12 23:48:15,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:15,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489234429] [2021-11-12 23:48:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:15,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:15,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:15,624 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:15,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:48:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:48:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 23:48:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-12 23:48:25,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489234429] [2021-11-12 23:48:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489234429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:25,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:25,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:48:25,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666453025] [2021-11-12 23:48:25,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:25,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:48:25,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:48:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:48:25,567 INFO L87 Difference]: Start difference. First operand 3948 states and 5326 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-12 23:48:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:26,281 INFO L93 Difference]: Finished difference Result 6987 states and 9384 transitions. [2021-11-12 23:48:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:48:26,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) Word has length 217 [2021-11-12 23:48:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:26,300 INFO L225 Difference]: With dead ends: 6987 [2021-11-12 23:48:26,301 INFO L226 Difference]: Without dead ends: 5976 [2021-11-12 23:48:26,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:48:26,307 INFO L933 BasicCegarLoop]: 4125 mSDtfsCounter, 3153 mSDsluCounter, 6418 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3153 SdHoareTripleChecker+Valid, 10543 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.49ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:26,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3153 Valid, 10543 Invalid, 34 Unknown, 0 Unchecked, 16.49ms Time], IncrementalHoareTripleChecker [21 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 147.68ms Time] [2021-11-12 23:48:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-11-12 23:48:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5972. [2021-11-12 23:48:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 4063 states have (on average 1.257937484617278) internal successors, (5111), 4191 states have internal predecessors, (5111), 1491 states have call successors, (1491), 408 states have call predecessors, (1491), 416 states have return successors, (1520), 1449 states have call predecessors, (1520), 1491 states have call successors, (1520) [2021-11-12 23:48:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8122 transitions. [2021-11-12 23:48:26,953 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8122 transitions. Word has length 217 [2021-11-12 23:48:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:26,954 INFO L470 AbstractCegarLoop]: Abstraction has 5972 states and 8122 transitions. [2021-11-12 23:48:26,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-12 23:48:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8122 transitions. [2021-11-12 23:48:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-12 23:48:26,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:26,968 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:27,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:27,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:27,183 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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)] === [2021-11-12 23:48:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash -312929530, now seen corresponding path program 1 times [2021-11-12 23:48:27,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:27,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340446807] [2021-11-12 23:48:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:27,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:27,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:27,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:27,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:48:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:48:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:33,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:48:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:48:35,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:48:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:48:37,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340446807] [2021-11-12 23:48:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340446807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180732612] [2021-11-12 23:48:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:37,535 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:37,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:48:37,545 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:48:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 23:48:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:48:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:48:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-12 23:48:43,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1180732612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:43,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:48:43,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:48:43,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708354612] [2021-11-12 23:48:43,501 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:48:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:48:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:48:43,503 INFO L87 Difference]: Start difference. First operand 5972 states and 8122 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-12 23:48:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:44,217 INFO L93 Difference]: Finished difference Result 13435 states and 18551 transitions. [2021-11-12 23:48:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:48:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 474 [2021-11-12 23:48:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:44,243 INFO L225 Difference]: With dead ends: 13435 [2021-11-12 23:48:44,244 INFO L226 Difference]: Without dead ends: 7490 [2021-11-12 23:48:44,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:48:44,264 INFO L933 BasicCegarLoop]: 3905 mSDtfsCounter, 662 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 7244 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:44,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 7244 Invalid, 5 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 39.61ms Time] [2021-11-12 23:48:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7490 states. [2021-11-12 23:48:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 5976. [2021-11-12 23:48:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 4067 states have (on average 1.2576837964101304) internal successors, (5115), 4195 states have internal predecessors, (5115), 1491 states have call successors, (1491), 408 states have call predecessors, (1491), 416 states have return successors, (1520), 1449 states have call predecessors, (1520), 1491 states have call successors, (1520) [2021-11-12 23:48:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 8126 transitions. [2021-11-12 23:48:44,943 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 8126 transitions. Word has length 474 [2021-11-12 23:48:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:44,943 INFO L470 AbstractCegarLoop]: Abstraction has 5976 states and 8126 transitions. [2021-11-12 23:48:44,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-12 23:48:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 8126 transitions. [2021-11-12 23:48:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-12 23:48:44,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:44,957 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:44,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:45,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:45,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:45,382 INFO L402 AbstractCegarLoop]: === Iteration 25 === 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)] === [2021-11-12 23:48:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1663339640, now seen corresponding path program 1 times [2021-11-12 23:48:45,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:45,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903895964] [2021-11-12 23:48:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:45,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:45,390 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:45,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:48:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:48:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:51,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:48:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:48:53,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:55,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:48:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:48:55,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:55,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903895964] [2021-11-12 23:48:55,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903895964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:55,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2144420920] [2021-11-12 23:48:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:55,693 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:55,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:48:55,695 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:48:55,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:48:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:48:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-12 23:49:01,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-12 23:49:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2144420920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:02,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:49:02,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:49:02,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694076709] [2021-11-12 23:49:02,853 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:49:02,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:49:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:49:02,856 INFO L87 Difference]: Start difference. First operand 5976 states and 8126 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-12 23:49:05,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:07,101 INFO L93 Difference]: Finished difference Result 17762 states and 24194 transitions. [2021-11-12 23:49:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:49:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) Word has length 474 [2021-11-12 23:49:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:07,152 INFO L225 Difference]: With dead ends: 17762 [2021-11-12 23:49:07,152 INFO L226 Difference]: Without dead ends: 11813 [2021-11-12 23:49:07,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:49:07,178 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 3056 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2817.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 7378 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.05ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2971.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:07,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3056 Valid, 7378 Invalid, 81 Unknown, 0 Unchecked, 16.05ms Time], IncrementalHoareTripleChecker [35 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2971.51ms Time] [2021-11-12 23:49:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11813 states. [2021-11-12 23:49:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11813 to 11809. [2021-11-12 23:49:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11809 states, 8020 states have (on average 1.2481296758104738) internal successors, (10010), 8274 states have internal predecessors, (10010), 2955 states have call successors, (2955), 816 states have call predecessors, (2955), 832 states have return successors, (3035), 2871 states have call predecessors, (3035), 2955 states have call successors, (3035) [2021-11-12 23:49:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11809 states to 11809 states and 16000 transitions. [2021-11-12 23:49:08,920 INFO L78 Accepts]: Start accepts. Automaton has 11809 states and 16000 transitions. Word has length 474 [2021-11-12 23:49:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:08,921 INFO L470 AbstractCegarLoop]: Abstraction has 11809 states and 16000 transitions. [2021-11-12 23:49:08,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-12 23:49:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11809 states and 16000 transitions. [2021-11-12 23:49:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-12 23:49:08,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:08,943 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:09,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:09,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:09,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === 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)] === [2021-11-12 23:49:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1024543984, now seen corresponding path program 1 times [2021-11-12 23:49:09,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:09,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933630119] [2021-11-12 23:49:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:09,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:09,376 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:09,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:49:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:49:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-12 23:49:18,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-11-12 23:49:20,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:20,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933630119] [2021-11-12 23:49:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933630119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:20,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:20,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:49:20,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258257144] [2021-11-12 23:49:20,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:49:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:49:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:49:20,522 INFO L87 Difference]: Start difference. First operand 11809 states and 16000 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 3 states have call successors, (112), 3 states have call predecessors, (112), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) [2021-11-12 23:49:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:21,782 INFO L93 Difference]: Finished difference Result 21603 states and 29202 transitions. [2021-11-12 23:49:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:49:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 3 states have call successors, (112), 3 states have call predecessors, (112), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) Word has length 477 [2021-11-12 23:49:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:21,839 INFO L225 Difference]: With dead ends: 21603 [2021-11-12 23:49:21,840 INFO L226 Difference]: Without dead ends: 10960 [2021-11-12 23:49:21,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 951 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:49:21,876 INFO L933 BasicCegarLoop]: 3218 mSDtfsCounter, 3159 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3159 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:21,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3159 Valid, 3218 Invalid, 1 Unknown, 0 Unchecked, 6.34ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 4.68ms Time] [2021-11-12 23:49:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10960 states. [2021-11-12 23:49:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10960 to 10960. [2021-11-12 23:49:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10960 states, 7439 states have (on average 1.244790966527759) internal successors, (9260), 7671 states have internal predecessors, (9260), 2757 states have call successors, (2757), 746 states have call predecessors, (2757), 762 states have return successors, (2800), 2687 states have call predecessors, (2800), 2757 states have call successors, (2800) [2021-11-12 23:49:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10960 states to 10960 states and 14817 transitions. [2021-11-12 23:49:22,946 INFO L78 Accepts]: Start accepts. Automaton has 10960 states and 14817 transitions. Word has length 477 [2021-11-12 23:49:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:22,947 INFO L470 AbstractCegarLoop]: Abstraction has 10960 states and 14817 transitions. [2021-11-12 23:49:22,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 3 states have call successors, (112), 3 states have call predecessors, (112), 3 states have return successors, (108), 3 states have call predecessors, (108), 3 states have call successors, (108) [2021-11-12 23:49:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 10960 states and 14817 transitions. [2021-11-12 23:49:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-12 23:49:22,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:22,963 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:23,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:23,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:23,187 INFO L402 AbstractCegarLoop]: === Iteration 27 === 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)] === [2021-11-12 23:49:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1926682101, now seen corresponding path program 1 times [2021-11-12 23:49:23,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:23,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101141799] [2021-11-12 23:49:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:23,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:23,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:23,195 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:23,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:49:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:49:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-11-12 23:49:32,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-12 23:49:35,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:35,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101141799] [2021-11-12 23:49:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101141799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:35,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:35,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:49:35,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997959060] [2021-11-12 23:49:35,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:35,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:49:35,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:49:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:49:35,200 INFO L87 Difference]: Start difference. First operand 10960 states and 14817 transitions. Second operand has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-12 23:49:37,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:39,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:43,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:56,230 INFO L93 Difference]: Finished difference Result 32761 states and 43943 transitions. [2021-11-12 23:49:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:49:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) Word has length 510 [2021-11-12 23:49:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:56,318 INFO L225 Difference]: With dead ends: 32761 [2021-11-12 23:49:56,318 INFO L226 Difference]: Without dead ends: 21359 [2021-11-12 23:49:56,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:49:56,353 INFO L933 BasicCegarLoop]: 4493 mSDtfsCounter, 6216 mSDsluCounter, 20175 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 663 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17501.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6295 SdHoareTripleChecker+Valid, 24668 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 66.12ms SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18453.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6295 Valid, 24668 Invalid, 2310 Unknown, 0 Unchecked, 66.12ms Time], IncrementalHoareTripleChecker [663 Valid, 1644 Invalid, 3 Unknown, 0 Unchecked, 18453.12ms Time] [2021-11-12 23:49:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21359 states. [2021-11-12 23:49:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21359 to 21342. [2021-11-12 23:49:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21342 states, 14267 states have (on average 1.227868507745146) internal successors, (17518), 14709 states have internal predecessors, (17518), 5375 states have call successors, (5375), 1670 states have call predecessors, (5375), 1698 states have return successors, (5462), 5216 states have call predecessors, (5462), 5373 states have call successors, (5462) [2021-11-12 23:49:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21342 states to 21342 states and 28355 transitions. [2021-11-12 23:49:58,372 INFO L78 Accepts]: Start accepts. Automaton has 21342 states and 28355 transitions. Word has length 510 [2021-11-12 23:49:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:58,372 INFO L470 AbstractCegarLoop]: Abstraction has 21342 states and 28355 transitions. [2021-11-12 23:49:58,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-12 23:49:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 21342 states and 28355 transitions. [2021-11-12 23:49:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-11-12 23:49:58,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:58,390 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:58,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:58,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:58,607 INFO L402 AbstractCegarLoop]: === Iteration 28 === 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)] === [2021-11-12 23:49:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1385979995, now seen corresponding path program 1 times [2021-11-12 23:49:58,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:58,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862195446] [2021-11-12 23:49:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:58,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:58,613 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:58,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:50:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:50:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-12 23:50:07,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-12 23:50:09,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:09,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862195446] [2021-11-12 23:50:09,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862195446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:09,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:09,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-12 23:50:09,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036755407] [2021-11-12 23:50:09,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:09,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:50:09,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:50:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:09,529 INFO L87 Difference]: Start difference. First operand 21342 states and 28355 transitions. Second operand has 6 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 2 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2021-11-12 23:50:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:11,962 INFO L93 Difference]: Finished difference Result 29413 states and 39087 transitions. [2021-11-12 23:50:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 2 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) Word has length 513 [2021-11-12 23:50:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:12,024 INFO L225 Difference]: With dead ends: 29413 [2021-11-12 23:50:12,024 INFO L226 Difference]: Without dead ends: 14679 [2021-11-12 23:50:12,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:12,071 INFO L933 BasicCegarLoop]: 3119 mSDtfsCounter, 3593 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 662.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3593 SdHoareTripleChecker+Valid, 6002 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.26ms SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 736.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:12,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3593 Valid, 6002 Invalid, 314 Unknown, 0 Unchecked, 14.26ms Time], IncrementalHoareTripleChecker [234 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 736.37ms Time] [2021-11-12 23:50:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14679 states. [2021-11-12 23:50:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14679 to 14661. [2021-11-12 23:50:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14661 states, 9755 states have (on average 1.2259354177344952) internal successors, (11959), 10070 states have internal predecessors, (11959), 3706 states have call successors, (3706), 1185 states have call predecessors, (3706), 1198 states have return successors, (3728), 3586 states have call predecessors, (3728), 3705 states have call successors, (3728) [2021-11-12 23:50:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14661 states to 14661 states and 19393 transitions. [2021-11-12 23:50:13,742 INFO L78 Accepts]: Start accepts. Automaton has 14661 states and 19393 transitions. Word has length 513 [2021-11-12 23:50:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:13,742 INFO L470 AbstractCegarLoop]: Abstraction has 14661 states and 19393 transitions. [2021-11-12 23:50:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 2 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2021-11-12 23:50:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14661 states and 19393 transitions. [2021-11-12 23:50:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-12 23:50:13,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:13,752 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:13,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:13,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:13,979 INFO L402 AbstractCegarLoop]: === Iteration 29 === 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)] === [2021-11-12 23:50:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash -640037427, now seen corresponding path program 1 times [2021-11-12 23:50:13,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:13,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25353162] [2021-11-12 23:50:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:13,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:13,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:13,987 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:14,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:50:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:19,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:50:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:50:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:50:21,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:24,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:50:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:50:24,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25353162] [2021-11-12 23:50:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25353162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:24,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1253228679] [2021-11-12 23:50:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:24,402 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:24,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:50:24,403 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:50:24,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:50:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:50:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-12 23:50:28,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-12 23:50:29,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1253228679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:29,432 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:50:29,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:50:29,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035810889] [2021-11-12 23:50:29,433 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:29,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:50:29,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:50:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:50:29,435 INFO L87 Difference]: Start difference. First operand 14661 states and 19393 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:50:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:30,892 INFO L93 Difference]: Finished difference Result 28898 states and 38250 transitions. [2021-11-12 23:50:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:50:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 475 [2021-11-12 23:50:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:30,961 INFO L225 Difference]: With dead ends: 28898 [2021-11-12 23:50:30,961 INFO L226 Difference]: Without dead ends: 14663 [2021-11-12 23:50:31,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1896 GetRequests, 1886 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:50:31,013 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 0 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6391 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:31,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6391 Invalid, 6 Unknown, 0 Unchecked, 8.54ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 46.38ms Time] [2021-11-12 23:50:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14663 states. [2021-11-12 23:50:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14663 to 14663. [2021-11-12 23:50:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14663 states, 9757 states have (on average 1.2258891052577636) internal successors, (11961), 10072 states have internal predecessors, (11961), 3706 states have call successors, (3706), 1185 states have call predecessors, (3706), 1198 states have return successors, (3728), 3586 states have call predecessors, (3728), 3705 states have call successors, (3728) [2021-11-12 23:50:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14663 states to 14663 states and 19395 transitions. [2021-11-12 23:50:32,578 INFO L78 Accepts]: Start accepts. Automaton has 14663 states and 19395 transitions. Word has length 475 [2021-11-12 23:50:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:32,579 INFO L470 AbstractCegarLoop]: Abstraction has 14663 states and 19395 transitions. [2021-11-12 23:50:32,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:50:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14663 states and 19395 transitions. [2021-11-12 23:50:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-12 23:50:32,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:32,586 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:32,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-12 23:50:32,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:32,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:32,987 INFO L402 AbstractCegarLoop]: === Iteration 30 === 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)] === [2021-11-12 23:50:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 340917387, now seen corresponding path program 1 times [2021-11-12 23:50:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:32,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286190657] [2021-11-12 23:50:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:32,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:32,992 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:32,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:50:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:50:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:38,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:50:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:50:40,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:42,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:50:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:50:43,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:43,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286190657] [2021-11-12 23:50:43,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286190657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:43,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059527117] [2021-11-12 23:50:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:43,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:43,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:50:43,121 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:50:43,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:50:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:50:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:45,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:50:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:50:47,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:50:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:50:50,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059527117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:50,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641976695] [2021-11-12 23:50:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:50,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:50:50,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:50:50,095 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:50:50,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 23:50:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:50:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-12 23:50:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:50:54,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:56,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 23:50:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:50:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641976695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:56,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:50:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 23:50:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299246751] [2021-11-12 23:50:56,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:50:56,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:50:56,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:50:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:56,490 INFO L87 Difference]: Start difference. First operand 14663 states and 19395 transitions. Second operand has 11 states, 7 states have (on average 38.142857142857146) internal successors, (267), 9 states have internal predecessors, (267), 9 states have call successors, (83), 2 states have call predecessors, (83), 5 states have return successors, (79), 7 states have call predecessors, (79), 9 states have call successors, (79) [2021-11-12 23:50:58,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:02,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:06,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:09,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:12,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:16,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:19,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:22,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:26,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:28,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:31,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:33,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:35,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:37,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:38,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:39,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:41,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:45,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:47,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:50,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:56,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:00,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:02,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:05,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:07,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:08,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:11,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:11,615 INFO L93 Difference]: Finished difference Result 29830 states and 40244 transitions. [2021-11-12 23:52:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:52:11,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 38.142857142857146) internal successors, (267), 9 states have internal predecessors, (267), 9 states have call successors, (83), 2 states have call predecessors, (83), 5 states have return successors, (79), 7 states have call predecessors, (79), 9 states have call successors, (79) Word has length 475 [2021-11-12 23:52:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:11,668 INFO L225 Difference]: With dead ends: 29830 [2021-11-12 23:52:11,669 INFO L226 Difference]: Without dead ends: 15188 [2021-11-12 23:52:11,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2846 GetRequests, 2833 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:11,717 INFO L933 BasicCegarLoop]: 3183 mSDtfsCounter, 255 mSDsluCounter, 21104 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 50 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71067.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 24287 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.78ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 73168.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:11,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 24287 Invalid, 2603 Unknown, 0 Unchecked, 55.78ms Time], IncrementalHoareTripleChecker [50 Valid, 1944 Invalid, 19 Unknown, 590 Unchecked, 73168.14ms Time] [2021-11-12 23:52:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2021-11-12 23:52:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 14707. [2021-11-12 23:52:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14707 states, 9789 states have (on average 1.2255593012565125) internal successors, (11997), 10104 states have internal predecessors, (11997), 3714 states have call successors, (3714), 1189 states have call predecessors, (3714), 1202 states have return successors, (3773), 3594 states have call predecessors, (3773), 3713 states have call successors, (3773) [2021-11-12 23:52:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14707 states to 14707 states and 19484 transitions. [2021-11-12 23:52:13,471 INFO L78 Accepts]: Start accepts. Automaton has 14707 states and 19484 transitions. Word has length 475 [2021-11-12 23:52:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:13,471 INFO L470 AbstractCegarLoop]: Abstraction has 14707 states and 19484 transitions. [2021-11-12 23:52:13,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 38.142857142857146) internal successors, (267), 9 states have internal predecessors, (267), 9 states have call successors, (83), 2 states have call predecessors, (83), 5 states have return successors, (79), 7 states have call predecessors, (79), 9 states have call successors, (79) [2021-11-12 23:52:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 14707 states and 19484 transitions. [2021-11-12 23:52:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-12 23:52:13,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:13,478 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:13,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:13,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:13,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:14,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:14,079 INFO L402 AbstractCegarLoop]: === Iteration 31 === 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)] === [2021-11-12 23:52:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -7471589, now seen corresponding path program 1 times [2021-11-12 23:52:14,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:14,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212756334] [2021-11-12 23:52:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:14,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:14,090 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:52:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:52:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:20,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:52:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:52:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:52:22,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:52:25,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:25,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212756334] [2021-11-12 23:52:25,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212756334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:25,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754735231] [2021-11-12 23:52:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:25,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:25,648 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:25,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:52:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:52:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-12 23:52:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:52:32,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754735231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:32,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:32,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 11 [2021-11-12 23:52:32,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133543795] [2021-11-12 23:52:32,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:32,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:52:32,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:52:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:32,391 INFO L87 Difference]: Start difference. First operand 14707 states and 19484 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2021-11-12 23:52:34,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:36,642 INFO L93 Difference]: Finished difference Result 31776 states and 42651 transitions. [2021-11-12 23:52:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) Word has length 476 [2021-11-12 23:52:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:36,699 INFO L225 Difference]: With dead ends: 31776 [2021-11-12 23:52:36,699 INFO L226 Difference]: Without dead ends: 17506 [2021-11-12 23:52:36,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1901 GetRequests, 1891 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:52:36,735 INFO L933 BasicCegarLoop]: 3716 mSDtfsCounter, 689 mSDsluCounter, 6963 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2206.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 10679 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.86ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2264.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:36,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 10679 Invalid, 20 Unknown, 0 Unchecked, 14.86ms Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2264.85ms Time] [2021-11-12 23:52:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-11-12 23:52:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 14979. [2021-11-12 23:52:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14979 states, 9998 states have (on average 1.2284456891378275) internal successors, (12282), 10313 states have internal predecessors, (12282), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1202 states have return successors, (3863), 3657 states have call predecessors, (3863), 3776 states have call successors, (3863) [2021-11-12 23:52:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 19922 transitions. [2021-11-12 23:52:38,497 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 19922 transitions. Word has length 476 [2021-11-12 23:52:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:38,498 INFO L470 AbstractCegarLoop]: Abstraction has 14979 states and 19922 transitions. [2021-11-12 23:52:38,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2021-11-12 23:52:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 19922 transitions. [2021-11-12 23:52:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-12 23:52:38,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:38,505 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:38,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:52:38,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-11-12 23:52:38,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:38,907 INFO L402 AbstractCegarLoop]: === Iteration 32 === 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)] === [2021-11-12 23:52:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 659910301, now seen corresponding path program 1 times [2021-11-12 23:52:38,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:38,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393113490] [2021-11-12 23:52:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:38,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:38,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:38,912 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:38,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:52:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2824 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:52:44,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:45,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:52:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:52:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:52:47,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:52:50,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:50,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393113490] [2021-11-12 23:52:50,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393113490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:50,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264088749] [2021-11-12 23:52:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:50,905 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:50,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:50,907 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:50,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:52:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2824 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:52:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 23:52:56,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:52:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264088749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:57,624 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:57,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7, 7] total 13 [2021-11-12 23:52:57,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822818484] [2021-11-12 23:52:57,624 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:57,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:52:57,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:52:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:57,626 INFO L87 Difference]: Start difference. First operand 14979 states and 19922 transitions. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 5 states have internal predecessors, (250), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:52:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:59,686 INFO L93 Difference]: Finished difference Result 32716 states and 44054 transitions. [2021-11-12 23:52:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:52:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 5 states have internal predecessors, (250), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) Word has length 476 [2021-11-12 23:52:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:59,747 INFO L225 Difference]: With dead ends: 32716 [2021-11-12 23:52:59,747 INFO L226 Difference]: Without dead ends: 17758 [2021-11-12 23:52:59,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1901 GetRequests, 1889 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:52:59,792 INFO L933 BasicCegarLoop]: 3398 mSDtfsCounter, 646 mSDsluCounter, 13386 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 16784 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:59,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 16784 Invalid, 20 Unknown, 0 Unchecked, 22.29ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 124.06ms Time] [2021-11-12 23:52:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17758 states. [2021-11-12 23:53:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17758 to 15000. [2021-11-12 23:53:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15000 states, 10016 states have (on average 1.2280351437699681) internal successors, (12300), 10328 states have internal predecessors, (12300), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:53:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15000 states to 15000 states and 19958 transitions. [2021-11-12 23:53:01,625 INFO L78 Accepts]: Start accepts. Automaton has 15000 states and 19958 transitions. Word has length 476 [2021-11-12 23:53:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:01,626 INFO L470 AbstractCegarLoop]: Abstraction has 15000 states and 19958 transitions. [2021-11-12 23:53:01,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 5 states have internal predecessors, (250), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:53:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 15000 states and 19958 transitions. [2021-11-12 23:53:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-12 23:53:01,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:01,634 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:01,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:01,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:02,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:02,051 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)] === [2021-11-12 23:53:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -212500261, now seen corresponding path program 1 times [2021-11-12 23:53:02,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:02,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833357776] [2021-11-12 23:53:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:02,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:02,057 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:02,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:53:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 2824 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:53:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:08,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:53:08,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:53:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:53:10,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:53:13,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:13,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833357776] [2021-11-12 23:53:13,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833357776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:13,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44233922] [2021-11-12 23:53:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:13,485 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:13,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:13,486 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:13,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-12 23:53:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-12 23:53:17,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:53:19,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44233922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:19,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:53:19,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 11 [2021-11-12 23:53:19,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125751135] [2021-11-12 23:53:19,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:19,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:19,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:53:19,318 INFO L87 Difference]: Start difference. First operand 15000 states and 19958 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:53:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:23,903 INFO L93 Difference]: Finished difference Result 35429 states and 48185 transitions. [2021-11-12 23:53:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 476 [2021-11-12 23:53:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:23,968 INFO L225 Difference]: With dead ends: 35429 [2021-11-12 23:53:23,968 INFO L226 Difference]: Without dead ends: 20450 [2021-11-12 23:53:24,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1900 GetRequests, 1891 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:53:24,012 INFO L933 BasicCegarLoop]: 3597 mSDtfsCounter, 1925 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1928.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 7432 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.30ms SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2158.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:24,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 7432 Invalid, 402 Unknown, 0 Unchecked, 17.30ms Time], IncrementalHoareTripleChecker [199 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 2158.93ms Time] [2021-11-12 23:53:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20450 states. [2021-11-12 23:53:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20450 to 15006. [2021-11-12 23:53:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15006 states, 10022 states have (on average 1.2278986230293354) internal successors, (12306), 10334 states have internal predecessors, (12306), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:53:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15006 states to 15006 states and 19964 transitions. [2021-11-12 23:53:25,821 INFO L78 Accepts]: Start accepts. Automaton has 15006 states and 19964 transitions. Word has length 476 [2021-11-12 23:53:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:25,822 INFO L470 AbstractCegarLoop]: Abstraction has 15006 states and 19964 transitions. [2021-11-12 23:53:25,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:53:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 15006 states and 19964 transitions. [2021-11-12 23:53:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-12 23:53:25,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:25,828 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:25,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:26,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:26,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:26,229 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)] === [2021-11-12 23:53:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:26,230 INFO L85 PathProgramCache]: Analyzing trace with hash -921104767, now seen corresponding path program 1 times [2021-11-12 23:53:26,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:26,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602468648] [2021-11-12 23:53:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:26,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:26,234 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:26,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:53:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:53:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:53:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:53:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:53:34,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:53:38,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:38,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602468648] [2021-11-12 23:53:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602468648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:38,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439565804] [2021-11-12 23:53:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:38,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:38,157 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:38,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-12 23:53:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:53:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-12 23:53:42,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2021-11-12 23:53:44,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439565804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:44,078 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:53:44,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 10 [2021-11-12 23:53:44,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398689139] [2021-11-12 23:53:44,079 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:44,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:53:44,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:53:44,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:53:44,081 INFO L87 Difference]: Start difference. First operand 15006 states and 19964 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:53:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:45,815 INFO L93 Difference]: Finished difference Result 30035 states and 40051 transitions. [2021-11-12 23:53:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:53:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 481 [2021-11-12 23:53:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:45,885 INFO L225 Difference]: With dead ends: 30035 [2021-11-12 23:53:45,885 INFO L226 Difference]: Without dead ends: 15050 [2021-11-12 23:53:45,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1920 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:53:45,943 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 3 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6392 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:45,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6392 Invalid, 5 Unknown, 0 Unchecked, 8.63ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 36.96ms Time] [2021-11-12 23:53:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15050 states. [2021-11-12 23:53:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15050 to 15017. [2021-11-12 23:53:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15017 states, 10033 states have (on average 1.2276487590949865) internal successors, (12317), 10345 states have internal predecessors, (12317), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:53:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15017 states to 15017 states and 19975 transitions. [2021-11-12 23:53:47,930 INFO L78 Accepts]: Start accepts. Automaton has 15017 states and 19975 transitions. Word has length 481 [2021-11-12 23:53:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:47,931 INFO L470 AbstractCegarLoop]: Abstraction has 15017 states and 19975 transitions. [2021-11-12 23:53:47,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:53:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15017 states and 19975 transitions. [2021-11-12 23:53:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-12 23:53:47,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:47,939 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:48,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:48,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-12 23:53:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:48,355 INFO L402 AbstractCegarLoop]: === Iteration 35 === 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)] === [2021-11-12 23:53:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash -791240189, now seen corresponding path program 1 times [2021-11-12 23:53:48,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:48,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847100250] [2021-11-12 23:53:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:48,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:48,364 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:48,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:53:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:53:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:54,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:53:54,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:53:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:53:56,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:53:59,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:59,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847100250] [2021-11-12 23:53:59,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847100250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:59,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1303237228] [2021-11-12 23:53:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:59,668 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:59,669 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-12 23:54:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:54:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-12 23:54:04,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:54:05,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1303237228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:05,576 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:05,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 10 [2021-11-12 23:54:05,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403113054] [2021-11-12 23:54:05,577 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:05,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:54:05,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:54:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:05,578 INFO L87 Difference]: Start difference. First operand 15017 states and 19975 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:54:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:07,246 INFO L93 Difference]: Finished difference Result 30057 states and 40055 transitions. [2021-11-12 23:54:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:54:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 481 [2021-11-12 23:54:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:07,312 INFO L225 Difference]: With dead ends: 30057 [2021-11-12 23:54:07,313 INFO L226 Difference]: Without dead ends: 15061 [2021-11-12 23:54:07,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1920 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:07,369 INFO L933 BasicCegarLoop]: 3204 mSDtfsCounter, 3 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:07,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6402 Invalid, 5 Unknown, 0 Unchecked, 9.22ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 29.47ms Time] [2021-11-12 23:54:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-11-12 23:54:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 15028. [2021-11-12 23:54:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 10044 states have (on average 1.227399442453206) internal successors, (12328), 10356 states have internal predecessors, (12328), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:54:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 19986 transitions. [2021-11-12 23:54:09,156 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 19986 transitions. Word has length 481 [2021-11-12 23:54:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 19986 transitions. [2021-11-12 23:54:09,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 23:54:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 19986 transitions. [2021-11-12 23:54:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-12 23:54:09,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:09,164 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:09,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:09,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:09,565 INFO L402 AbstractCegarLoop]: === Iteration 36 === 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)] === [2021-11-12 23:54:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1664905791, now seen corresponding path program 1 times [2021-11-12 23:54:09,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:09,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713717457] [2021-11-12 23:54:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:09,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:09,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:09,571 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:09,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:54:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:54:14,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:15,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:54:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:54:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-12 23:54:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-12 23:54:21,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:21,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713717457] [2021-11-12 23:54:21,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713717457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:21,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304740764] [2021-11-12 23:54:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:21,076 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:21,077 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:21,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-12 23:54:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:54:23,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-12 23:54:25,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:54:26,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304740764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:26,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:26,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 13 [2021-11-12 23:54:26,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007510332] [2021-11-12 23:54:26,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:26,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:54:26,415 INFO L87 Difference]: Start difference. First operand 15028 states and 19986 transitions. Second operand has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-12 23:54:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:28,485 INFO L93 Difference]: Finished difference Result 29560 states and 39306 transitions. [2021-11-12 23:54:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:54:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 481 [2021-11-12 23:54:28,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:28,529 INFO L225 Difference]: With dead ends: 29560 [2021-11-12 23:54:28,529 INFO L226 Difference]: Without dead ends: 15066 [2021-11-12 23:54:28,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1921 GetRequests, 1909 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:54:28,567 INFO L933 BasicCegarLoop]: 3215 mSDtfsCounter, 36 mSDsluCounter, 6408 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 9623 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.28ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:28,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 9623 Invalid, 45 Unknown, 0 Unchecked, 12.28ms Time], IncrementalHoareTripleChecker [31 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 128.99ms Time] [2021-11-12 23:54:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15066 states. [2021-11-12 23:54:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15066 to 15032. [2021-11-12 23:54:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15032 states, 10048 states have (on average 1.2273089171974523) internal successors, (12332), 10360 states have internal predecessors, (12332), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:54:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15032 states to 15032 states and 19990 transitions. [2021-11-12 23:54:30,506 INFO L78 Accepts]: Start accepts. Automaton has 15032 states and 19990 transitions. Word has length 481 [2021-11-12 23:54:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:30,507 INFO L470 AbstractCegarLoop]: Abstraction has 15032 states and 19990 transitions. [2021-11-12 23:54:30,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-12 23:54:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 15032 states and 19990 transitions. [2021-11-12 23:54:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-11-12 23:54:30,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:30,514 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:30,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:30,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:30,915 INFO L402 AbstractCegarLoop]: === Iteration 37 === 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)] === [2021-11-12 23:54:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1671774472, now seen corresponding path program 1 times [2021-11-12 23:54:30,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:30,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684033234] [2021-11-12 23:54:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:30,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:30,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:30,921 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:30,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 23:54:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:54:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:37,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:54:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:54:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-12 23:54:40,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-12 23:54:44,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:44,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684033234] [2021-11-12 23:54:44,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684033234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:54:44,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343085786] [2021-11-12 23:54:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:44,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:54:44,567 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:54:44,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-12 23:54:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:54:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-11-12 23:54:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-12 23:54:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343085786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:52,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:54:52,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 15 [2021-11-12 23:54:52,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235621038] [2021-11-12 23:54:52,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:52,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:52,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:54:52,221 INFO L87 Difference]: Start difference. First operand 15032 states and 19990 transitions. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-12 23:54:54,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:55,846 INFO L93 Difference]: Finished difference Result 30092 states and 40031 transitions. [2021-11-12 23:54:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 536 [2021-11-12 23:54:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:55,893 INFO L225 Difference]: With dead ends: 30092 [2021-11-12 23:54:55,893 INFO L226 Difference]: Without dead ends: 15081 [2021-11-12 23:54:55,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2142 GetRequests, 2127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:54:55,929 INFO L933 BasicCegarLoop]: 3202 mSDtfsCounter, 26 mSDsluCounter, 9578 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1690.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 12780 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.93ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1764.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:55,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 12780 Invalid, 43 Unknown, 0 Unchecked, 12.93ms Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 1764.74ms Time] [2021-11-12 23:54:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15081 states. [2021-11-12 23:54:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15081 to 15041. [2021-11-12 23:54:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15041 states, 10057 states have (on average 1.2271054986576513) internal successors, (12341), 10369 states have internal predecessors, (12341), 3777 states have call successors, (3777), 1189 states have call predecessors, (3777), 1205 states have return successors, (3881), 3663 states have call predecessors, (3881), 3776 states have call successors, (3881) [2021-11-12 23:54:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15041 states to 15041 states and 19999 transitions. [2021-11-12 23:54:57,508 INFO L78 Accepts]: Start accepts. Automaton has 15041 states and 19999 transitions. Word has length 536 [2021-11-12 23:54:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 15041 states and 19999 transitions. [2021-11-12 23:54:57,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-12 23:54:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15041 states and 19999 transitions. [2021-11-12 23:54:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-11-12 23:54:57,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:57,515 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:57,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:57,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:57,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:54:57,916 INFO L402 AbstractCegarLoop]: === Iteration 38 === 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)] === [2021-11-12 23:54:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 485980831, now seen corresponding path program 1 times [2021-11-12 23:54:57,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:57,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488381536] [2021-11-12 23:54:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:57,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:57,920 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-12 23:55:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:03,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:55:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-12 23:55:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-12 23:55:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 240 proven. 3 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-12 23:55:06,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2021-11-12 23:55:09,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:09,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488381536] [2021-11-12 23:55:09,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488381536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:55:09,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558071647] [2021-11-12 23:55:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:09,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:55:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:55:09,882 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:55:09,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15a6a300-a93c-446e-9176-54120e0e4059/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-12 23:55:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:55:16,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-12 23:55:19,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2021-11-12 23:55:20,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558071647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:20,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:55:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 11 [2021-11-12 23:55:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265342613] [2021-11-12 23:55:20,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:55:20,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:55:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:55:20,853 INFO L87 Difference]: Start difference. First operand 15041 states and 19999 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2021-11-12 23:55:23,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:25,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []