./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-dec-tulip-de4x5.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_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/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_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/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_08ce5a5e-989c-41d8-82ff-189843c57c42/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 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:07,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:07,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:07,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:07,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:07,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:07,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:07,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:07,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:07,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:07,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:07,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:07,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:07,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:07,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:07,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:07,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:07,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:07,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:07,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:07,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:07,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:07,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:07,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:07,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:07,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:07,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:07,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:07,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:07,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:07,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:07,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:07,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:07,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:07,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:07,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:07,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:07,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:07,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:07,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:07,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:07,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:08:07,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:07,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:07,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:07,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:07,863 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:07,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:07,864 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:07,864 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:08:07,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:07,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:07,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:08:07,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:08:07,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:07,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:08:07,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:08:07,868 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:08:07,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:07,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:08:07,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:07,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:07,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:07,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:07,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:07,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:07,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:07,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:07,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:07,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:07,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:07,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:07,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:07,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:07,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:08:07,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:08:07,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:07,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:07,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:07,875 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_08ce5a5e-989c-41d8-82ff-189843c57c42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 [2021-11-12 23:08:08,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:08,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:08,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:08,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:08,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:08,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-12 23:08:08,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/98b0f7f8b/c71bc1fe673a4ece89f952610b9d9f5e/FLAGb1ec57670 [2021-11-12 23:08:09,612 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:09,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-12 23:08:09,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/98b0f7f8b/c71bc1fe673a4ece89f952610b9d9f5e/FLAGb1ec57670 [2021-11-12 23:08:09,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/98b0f7f8b/c71bc1fe673a4ece89f952610b9d9f5e [2021-11-12 23:08:09,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:09,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:09,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:09,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:09,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:09,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:09" (1/1) ... [2021-11-12 23:08:09,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b5c9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:09, skipping insertion in model container [2021-11-12 23:08:09,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:09" (1/1) ... [2021-11-12 23:08:09,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:10,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:12,439 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 23:08:12,447 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 23:08:12,498 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 23:08:12,499 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 23:08:12,500 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 23:08:12,509 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 23:08:12,509 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 23:08:12,510 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 23:08:12,511 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 23:08:13,168 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 23:08:13,187 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 23:08:13,203 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 23:08:13,217 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 23:08:13,231 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 23:08:13,246 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 23:08:13,247 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 23:08:13,260 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 23:08:13,286 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 23:08:13,299 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 23:08:13,303 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 23:08:13,308 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 23:08:13,314 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 23:08:13,319 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 23:08:13,321 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 23:08:13,326 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 23:08:13,332 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 23:08:13,337 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 23:08:13,353 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 23:08:13,373 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 23:08:13,388 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 23:08:13,392 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 23:08:13,394 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 23:08:13,403 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 23:08:13,407 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 23:08:13,410 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 23:08:13,433 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 23:08:13,480 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 23:08:13,557 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 23:08:13,561 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 23:08:13,570 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 23:08:13,581 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 23:08:13,600 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 23:08:13,648 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 23:08:13,650 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 23:08:13,653 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 23:08:13,659 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 23:08:13,663 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 23:08:13,675 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 23:08:13,705 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 23:08:13,708 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 23:08:13,711 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 23:08:13,715 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 23:08:13,718 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 23:08:13,719 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 23:08:13,722 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 23:08:13,725 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 23:08:13,729 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 23:08:13,733 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 23:08:13,734 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 23:08:13,735 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 23:08:13,736 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 23:08:13,739 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 23:08:13,742 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 23:08:13,755 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 23:08:13,760 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 23:08:13,772 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 23:08:13,773 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 23:08:13,784 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 23:08:13,788 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 23:08:13,793 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 23:08:13,794 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 23:08:13,798 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 23:08:13,802 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 23:08:13,805 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 23:08:13,809 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 23:08:13,814 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 23:08:13,820 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 23:08:13,827 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 23:08:13,833 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 23:08:13,841 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 23:08:13,847 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 23:08:13,856 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 23:08:13,864 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 23:08:13,867 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 23:08:13,869 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 23:08:13,874 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 23:08:13,876 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 23:08:13,878 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 23:08:13,882 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 23:08:13,891 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 23:08:13,897 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 23:08:13,903 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 23:08:13,913 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 23:08:14,465 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 23:08:14,467 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 23:08:14,468 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 23:08:14,469 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 23:08:14,470 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 23:08:14,470 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 23:08:14,471 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 23:08:14,472 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 23:08:14,481 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 23:08:14,484 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 23:08:14,487 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 23:08:14,489 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 23:08:14,492 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 23:08:14,496 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 23:08:14,497 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 23:08:14,498 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 23:08:14,503 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 23:08:14,520 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 23:08:14,536 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 23:08:15,576 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-12 23:08:15,579 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-12 23:08:15,587 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-12 23:08:15,587 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-12 23:08:15,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:15,705 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 23:08:15,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bf8bdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:15, skipping insertion in model container [2021-11-12 23:08:15,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:15,706 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:08:15,709 INFO L158 Benchmark]: Toolchain (without parser) took 5907.70ms. Allocated memory was 107.0MB in the beginning and 243.3MB in the end (delta: 136.3MB). Free memory was 67.4MB in the beginning and 160.2MB in the end (delta: -92.9MB). Peak memory consumption was 78.0MB. Max. memory is 16.1GB. [2021-11-12 23:08:15,710 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:08:15,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 5902.33ms. Allocated memory was 107.0MB in the beginning and 243.3MB in the end (delta: 136.3MB). Free memory was 67.0MB in the beginning and 160.2MB in the end (delta: -93.2MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. [2021-11-12 23:08:15,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 5902.33ms. Allocated memory was 107.0MB in the beginning and 243.3MB in the end (delta: 136.3MB). Free memory was 67.0MB in the beginning and 160.2MB in the end (delta: -93.2MB). Peak memory consumption was 75.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5927]: 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_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/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_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/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_08ce5a5e-989c-41d8-82ff-189843c57c42/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 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:08:18,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:08:18,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:08:18,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:08:18,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:08:18,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:08:18,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:08:18,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:08:18,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:08:18,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:08:18,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:08:18,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:08:18,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:08:18,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:08:18,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:08:18,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:08:18,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:08:18,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:08:18,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:08:18,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:08:18,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:08:18,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:08:18,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:08:18,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:08:18,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:08:18,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:08:18,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:08:18,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:08:18,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:08:18,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:08:18,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:08:18,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:08:18,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:08:18,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:08:18,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:08:18,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:08:18,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:08:18,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:08:18,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:08:18,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:08:18,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:08:18,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:08:18,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:08:18,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:08:18,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:08:18,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:08:18,651 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:08:18,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:08:18,652 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:08:18,652 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:08:18,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:08:18,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:08:18,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:08:18,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:08:18,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:08:18,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:08:18,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:08:18,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:08:18,657 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:08:18,657 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:08:18,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:08:18,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:08:18,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:08:18,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:08:18,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:08:18,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:08:18,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:18,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:08:18,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:08:18,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:08:18,661 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:08:18,661 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:08:18,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:08:18,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:08:18,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:08:18,662 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_08ce5a5e-989c-41d8-82ff-189843c57c42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 [2021-11-12 23:08:19,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:19,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:19,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:19,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:19,181 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:19,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-12 23:08:19,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/aea7b3fed/3d03d511de1a4c20b9f9181b37c715ad/FLAGceffabc50 [2021-11-12 23:08:20,672 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:20,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-12 23:08:20,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/aea7b3fed/3d03d511de1a4c20b9f9181b37c715ad/FLAGceffabc50 [2021-11-12 23:08:21,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/data/aea7b3fed/3d03d511de1a4c20b9f9181b37c715ad [2021-11-12 23:08:21,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:21,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:21,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:21,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:21,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:21,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:21" (1/1) ... [2021-11-12 23:08:21,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c426ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:21, skipping insertion in model container [2021-11-12 23:08:21,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:21" (1/1) ... [2021-11-12 23:08:21,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:21,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:26,810 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-12 23:08:26,814 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-12 23:08:26,815 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-12 23:08:26,816 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-12 23:08:26,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:26,945 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:08:27,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:27,929 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-12 23:08:27,929 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-12 23:08:27,930 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-12 23:08:27,931 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-12 23:08:27,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:27,988 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:08:28,783 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-12 23:08:28,784 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-12 23:08:28,785 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-12 23:08:28,785 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_08ce5a5e-989c-41d8-82ff-189843c57c42/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-12 23:08:28,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:29,137 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:08:29,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29 WrapperNode [2021-11-12 23:08:29,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:29,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:29,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:08:29,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:08:29,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:29,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:29,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:29,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:08:29,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:08:29,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:08:29,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:29,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:08:30,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:08:30,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:08:30,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:08:30,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (1/1) ... [2021-11-12 23:08:30,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:30,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:08:30,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:08:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2021-11-12 23:08:30,786 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2021-11-12 23:08:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:08:30,786 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:08:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:08:30,787 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:08:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:08:30,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:08:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-12 23:08:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-12 23:08:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2021-11-12 23:08:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2021-11-12 23:08:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-12 23:08:30,788 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-12 23:08:30,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-12 23:08:30,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-12 23:08:30,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:08:30,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:08:30,790 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-12 23:08:30,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-12 23:08:30,790 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2021-11-12 23:08:30,790 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2021-11-12 23:08:30,791 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2021-11-12 23:08:30,791 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2021-11-12 23:08:30,791 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-12 23:08:30,791 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-12 23:08:30,792 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2021-11-12 23:08:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2021-11-12 23:08:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_69 [2021-11-12 23:08:30,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_69 [2021-11-12 23:08:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:08:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:08:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2021-11-12 23:08:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2021-11-12 23:08:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-12 23:08:30,795 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-12 23:08:30,795 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:08:30,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:08:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-12 23:08:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-12 23:08:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-12 23:08:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-12 23:08:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2021-11-12 23:08:30,798 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2021-11-12 23:08:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-12 23:08:30,799 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-12 23:08:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:08:30,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:08:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-12 23:08:30,800 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-12 23:08:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-12 23:08:30,801 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-12 23:08:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-12 23:08:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-12 23:08:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:08:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:08:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-12 23:08:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2021-11-12 23:08:30,803 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2021-11-12 23:08:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:08:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-12 23:08:30,804 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-12 23:08:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:08:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 23:08:30,805 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 23:08:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:08:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:08:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-12 23:08:30,806 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-12 23:08:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2021-11-12 23:08:30,807 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2021-11-12 23:08:30,807 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:08:30,807 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:08:30,807 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~C_INT [2021-11-12 23:08:30,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~C_INT [2021-11-12 23:08:30,808 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:08:30,809 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:08:30,810 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2021-11-12 23:08:30,810 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2021-11-12 23:08:30,810 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2021-11-12 23:08:30,810 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2021-11-12 23:08:30,810 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:08:30,812 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:08:30,812 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:08:30,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:08:30,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:08:30,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:08:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~C_INT [2021-11-12 23:08:30,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~C_INT [2021-11-12 23:08:30,813 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-12 23:08:30,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-12 23:08:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:08:30,814 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:08:30,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-12 23:08:30,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-12 23:08:30,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:08:30,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:08:30,815 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2021-11-12 23:08:30,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2021-11-12 23:08:30,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 23:08:30,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 23:08:30,816 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-12 23:08:30,817 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-12 23:08:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-12 23:08:30,820 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-12 23:08:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:08:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:08:30,824 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2021-11-12 23:08:30,824 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2021-11-12 23:08:30,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:08:30,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:08:30,826 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-12 23:08:30,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-12 23:08:30,827 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2021-11-12 23:08:30,832 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2021-11-12 23:08:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:08:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2021-11-12 23:08:30,833 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2021-11-12 23:08:30,833 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2021-11-12 23:08:30,834 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2021-11-12 23:08:30,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:08:30,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:08:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 23:08:30,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 23:08:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:08:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:08:30,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:08:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:08:30,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:08:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:08:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2021-11-12 23:08:30,836 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2021-11-12 23:08:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-12 23:08:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-12 23:08:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2021-11-12 23:08:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2021-11-12 23:08:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2021-11-12 23:08:30,838 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2021-11-12 23:08:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2021-11-12 23:08:30,838 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2021-11-12 23:08:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:08:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:08:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-12 23:08:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-12 23:08:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:08:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:08:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2021-11-12 23:08:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2021-11-12 23:08:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:08:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:08:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-12 23:08:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-12 23:08:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:08:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2021-11-12 23:08:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2021-11-12 23:08:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2021-11-12 23:08:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2021-11-12 23:08:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:08:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:08:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2021-11-12 23:08:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2021-11-12 23:08:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:08:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-12 23:08:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-12 23:08:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:08:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-12 23:08:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-12 23:08:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:08:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:08:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:08:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:08:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:08:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:08:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2021-11-12 23:08:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2021-11-12 23:08:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:08:30,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:08:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-12 23:08:30,847 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-12 23:08:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2021-11-12 23:08:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2021-11-12 23:08:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2021-11-12 23:08:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2021-11-12 23:08:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-12 23:08:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-12 23:08:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-12 23:08:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-12 23:08:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2021-11-12 23:08:30,849 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2021-11-12 23:08:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-12 23:08:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-12 23:08:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2021-11-12 23:08:30,850 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2021-11-12 23:08:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-12 23:08:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-12 23:08:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:08:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:08:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2021-11-12 23:08:30,851 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2021-11-12 23:08:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:08:30,852 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:08:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-12 23:08:30,852 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-12 23:08:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2021-11-12 23:08:30,853 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2021-11-12 23:08:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2021-11-12 23:08:30,853 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2021-11-12 23:08:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2021-11-12 23:08:30,854 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2021-11-12 23:08:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-12 23:08:30,854 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-12 23:08:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_pci_remove [2021-11-12 23:08:30,854 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_pci_remove [2021-11-12 23:08:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:08:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2021-11-12 23:08:30,855 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2021-11-12 23:08:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-12 23:08:30,855 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-12 23:08:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-12 23:08:30,856 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-12 23:08:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2021-11-12 23:08:30,856 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2021-11-12 23:08:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:08:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-12 23:08:30,857 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-12 23:08:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2021-11-12 23:08:30,857 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2021-11-12 23:08:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:08:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:08:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:08:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:08:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:08:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:08:30,865 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:08:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2021-11-12 23:08:30,865 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2021-11-12 23:08:30,865 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-12 23:08:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-12 23:08:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2021-11-12 23:08:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2021-11-12 23:08:30,866 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-12 23:08:30,866 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-12 23:08:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:08:30,872 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:08:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-12 23:08:30,872 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-12 23:08:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-12 23:08:30,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-12 23:08:30,873 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-12 23:08:30,873 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-12 23:08:30,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:08:30,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:08:30,873 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-12 23:08:30,874 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-12 23:08:30,874 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2021-11-12 23:08:30,874 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2021-11-12 23:08:30,874 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2021-11-12 23:08:30,874 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2021-11-12 23:08:30,875 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2021-11-12 23:08:30,875 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2021-11-12 23:08:30,875 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-12 23:08:30,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-12 23:08:30,875 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-12 23:08:30,876 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-12 23:08:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 23:08:30,876 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 23:08:30,876 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:08:30,876 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:08:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-12 23:08:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-12 23:08:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:08:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:08:30,877 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-12 23:08:30,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-12 23:08:30,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_73 [2021-11-12 23:08:30,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_73 [2021-11-12 23:08:30,878 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_infoleaf [2021-11-12 23:08:30,878 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_infoleaf [2021-11-12 23:08:30,878 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2021-11-12 23:08:30,879 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2021-11-12 23:08:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:08:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:08:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:08:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:08:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:08:30,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:08:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2021-11-12 23:08:30,880 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2021-11-12 23:08:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-12 23:08:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-12 23:08:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2021-11-12 23:08:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2021-11-12 23:08:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 23:08:30,881 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 23:08:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2021-11-12 23:08:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2021-11-12 23:08:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-12 23:08:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-12 23:08:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2021-11-12 23:08:30,998 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2021-11-12 23:08:30,998 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-12 23:08:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-12 23:08:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:08:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:08:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2021-11-12 23:08:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2021-11-12 23:08:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2021-11-12 23:08:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2021-11-12 23:08:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2021-11-12 23:08:30,999 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2021-11-12 23:08:30,999 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2021-11-12 23:08:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2021-11-12 23:08:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2021-11-12 23:08:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2021-11-12 23:08:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-12 23:08:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-12 23:08:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 23:08:31,000 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 23:08:31,000 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2021-11-12 23:08:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2021-11-12 23:08:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_strncmp [2021-11-12 23:08:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_strncmp [2021-11-12 23:08:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-12 23:08:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-12 23:08:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2021-11-12 23:08:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2021-11-12 23:08:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2021-11-12 23:08:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2021-11-12 23:08:31,001 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2021-11-12 23:08:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2021-11-12 23:08:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:08:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:08:31,002 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-12 23:08:37,309 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:10:24,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:10:24,730 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-12 23:10:24,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:10:24 BoogieIcfgContainer [2021-11-12 23:10:24,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:10:24,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:10:24,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:10:24,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:10:24,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:08:21" (1/3) ... [2021-11-12 23:10:24,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ceebf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:10:24, skipping insertion in model container [2021-11-12 23:10:24,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:29" (2/3) ... [2021-11-12 23:10:24,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ceebf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:10:24, skipping insertion in model container [2021-11-12 23:10:24,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:10:24" (3/3) ... [2021-11-12 23:10:24,746 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-12 23:10:24,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:10:24,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-12 23:10:24,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:10:24,837 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 23:10:24,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:10:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 3798 states, 2688 states have (on average 1.3530505952380953) internal successors, (3637), 2765 states have internal predecessors, (3637), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) [2021-11-12 23:10:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:10:24,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:24,935 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] [2021-11-12 23:10:24,936 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 23:10:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:24,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1763242755, now seen corresponding path program 1 times [2021-11-12 23:10:24,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:24,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571025968] [2021-11-12 23:10:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:24,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:24,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:24,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:10:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:28,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:29,251 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 23:10:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:29,554 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 23:10:29,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:29,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571025968] [2021-11-12 23:10:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571025968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:29,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:29,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:10:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698730883] [2021-11-12 23:10:29,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:29,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:10:29,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:10:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:29,600 INFO L87 Difference]: Start difference. First operand has 3798 states, 2688 states have (on average 1.3530505952380953) internal successors, (3637), 2765 states have internal predecessors, (3637), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 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 23:10:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:30,376 INFO L93 Difference]: Finished difference Result 7523 states and 11247 transitions. [2021-11-12 23:10:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 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 48 [2021-11-12 23:10:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:30,431 INFO L225 Difference]: With dead ends: 7523 [2021-11-12 23:10:30,431 INFO L226 Difference]: Without dead ends: 3736 [2021-11-12 23:10:30,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:10:30,484 INFO L933 BasicCegarLoop]: 5462 mSDtfsCounter, 5427 mSDsluCounter, 16361 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5440 SdHoareTripleChecker+Valid, 21823 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 103.54ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:30,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5440 Valid, 21823 Invalid, 36 Unknown, 0 Unchecked, 103.54ms Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 113.58ms Time] [2021-11-12 23:10:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-11-12 23:10:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3736. [2021-11-12 23:10:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 2636 states have (on average 1.3482549317147192) internal successors, (3554), 2694 states have internal predecessors, (3554), 947 states have call successors, (947), 151 states have call predecessors, (947), 150 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:10:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 5445 transitions. [2021-11-12 23:10:30,872 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 5445 transitions. Word has length 48 [2021-11-12 23:10:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:30,873 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 5445 transitions. [2021-11-12 23:10:30,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 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 23:10:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 5445 transitions. [2021-11-12 23:10:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:10:30,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:30,877 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] [2021-11-12 23:10:30,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:31,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:31,094 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 23:10:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash -524435869, now seen corresponding path program 1 times [2021-11-12 23:10:31,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:31,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153168892] [2021-11-12 23:10:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:31,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:31,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:31,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:10:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:34,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:35,359 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 23:10:35,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:35,706 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 23:10:35,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:35,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153168892] [2021-11-12 23:10:35,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153168892] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:35,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:35,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:10:35,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046563572] [2021-11-12 23:10:35,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:35,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:10:35,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:10:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:35,710 INFO L87 Difference]: Start difference. First operand 3736 states and 5445 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:10:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:36,233 INFO L93 Difference]: Finished difference Result 3742 states and 5450 transitions. [2021-11-12 23:10:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 53 [2021-11-12 23:10:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:36,275 INFO L225 Difference]: With dead ends: 3742 [2021-11-12 23:10:36,275 INFO L226 Difference]: Without dead ends: 3740 [2021-11-12 23:10:36,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:10:36,281 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5424 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:36,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5424 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 47.74ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 75.58ms Time] [2021-11-12 23:10:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-11-12 23:10:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3740. [2021-11-12 23:10:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3740 states, 2639 states have (on average 1.3478590375142099) internal successors, (3557), 2697 states have internal predecessors, (3557), 947 states have call successors, (947), 152 states have call predecessors, (947), 151 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:10:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3740 states to 3740 states and 5448 transitions. [2021-11-12 23:10:36,563 INFO L78 Accepts]: Start accepts. Automaton has 3740 states and 5448 transitions. Word has length 53 [2021-11-12 23:10:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:36,564 INFO L470 AbstractCegarLoop]: Abstraction has 3740 states and 5448 transitions. [2021-11-12 23:10:36,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:10:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3740 states and 5448 transitions. [2021-11-12 23:10:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:10:36,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:36,574 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] [2021-11-12 23:10:36,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:36,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:36,792 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 23:10:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash 77141117, now seen corresponding path program 1 times [2021-11-12 23:10:36,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:36,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308603350] [2021-11-12 23:10:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:36,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:36,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:36,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:36,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:10:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:41,112 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 23:10:41,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:41,448 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 23:10:41,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:41,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308603350] [2021-11-12 23:10:41,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308603350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:41,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:41,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:10:41,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063424973] [2021-11-12 23:10:41,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:41,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:10:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:10:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:41,451 INFO L87 Difference]: Start difference. First operand 3740 states and 5448 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:10:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:41,887 INFO L93 Difference]: Finished difference Result 3746 states and 5453 transitions. [2021-11-12 23:10:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 58 [2021-11-12 23:10:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:41,925 INFO L225 Difference]: With dead ends: 3746 [2021-11-12 23:10:41,926 INFO L226 Difference]: Without dead ends: 3744 [2021-11-12 23:10:41,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:10:41,932 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5423 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:41,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5423 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 42.31ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 74.80ms Time] [2021-11-12 23:10:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2021-11-12 23:10:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3744. [2021-11-12 23:10:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 2642 states have (on average 1.3474640423921271) internal successors, (3560), 2700 states have internal predecessors, (3560), 947 states have call successors, (947), 153 states have call predecessors, (947), 152 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:10:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5451 transitions. [2021-11-12 23:10:42,218 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5451 transitions. Word has length 58 [2021-11-12 23:10:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:42,219 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5451 transitions. [2021-11-12 23:10:42,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:10:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5451 transitions. [2021-11-12 23:10:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:10:42,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:42,224 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] [2021-11-12 23:10:42,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:42,441 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 23:10:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 667830667, now seen corresponding path program 1 times [2021-11-12 23:10:42,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:42,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046091820] [2021-11-12 23:10:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:42,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:42,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:42,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:42,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:10:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:10:45,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:10:46,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:10:47,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:47,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046091820] [2021-11-12 23:10:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046091820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:47,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1556495924] [2021-11-12 23:10:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:47,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:47,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:10:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:50,497 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 23:10:50,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:50,986 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 23:10:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1556495924] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:50,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:10:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:10:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470609655] [2021-11-12 23:10:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:50,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:10:50,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:10:50,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:10:50,991 INFO L87 Difference]: Start difference. First operand 3744 states and 5451 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:10:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:51,589 INFO L93 Difference]: Finished difference Result 3750 states and 5456 transitions. [2021-11-12 23:10:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 70 [2021-11-12 23:10:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:51,629 INFO L225 Difference]: With dead ends: 3750 [2021-11-12 23:10:51,629 INFO L226 Difference]: Without dead ends: 3748 [2021-11-12 23:10:51,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:10:51,635 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5406 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5415 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:51,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5415 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 32.62ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 79.02ms Time] [2021-11-12 23:10:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-12 23:10:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3748. [2021-11-12 23:10:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 2645 states have (on average 1.347069943289225) internal successors, (3563), 2703 states have internal predecessors, (3563), 947 states have call successors, (947), 154 states have call predecessors, (947), 153 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:10:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 5454 transitions. [2021-11-12 23:10:51,924 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 5454 transitions. Word has length 70 [2021-11-12 23:10:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:51,927 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 5454 transitions. [2021-11-12 23:10:51,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:10:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 5454 transitions. [2021-11-12 23:10:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:10:51,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:51,930 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] [2021-11-12 23:10:51,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:52,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:52,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:52,347 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 23:10:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash 497250773, now seen corresponding path program 1 times [2021-11-12 23:10:52,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:52,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613374566] [2021-11-12 23:10:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:52,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:52,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:52,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:10:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:10:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:10:56,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:10:57,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:57,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613374566] [2021-11-12 23:10:57,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613374566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:10:57,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222676639] [2021-11-12 23:10:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:57,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:10:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:10:57,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:10:57,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:10:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:10:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:00,050 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 23:11:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:00,539 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 23:11:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222676639] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:00,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:11:00,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:11:00,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059723807] [2021-11-12 23:11:00,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:00,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:00,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:11:00,542 INFO L87 Difference]: Start difference. First operand 3748 states and 5454 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:01,224 INFO L93 Difference]: Finished difference Result 3754 states and 5459 transitions. [2021-11-12 23:11:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 75 [2021-11-12 23:11:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:01,255 INFO L225 Difference]: With dead ends: 3754 [2021-11-12 23:11:01,255 INFO L226 Difference]: Without dead ends: 3752 [2021-11-12 23:11:01,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:11:01,259 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5406 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5414 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:01,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5414 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 31.53ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 80.14ms Time] [2021-11-12 23:11:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-11-12 23:11:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3752. [2021-11-12 23:11:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3752 states, 2648 states have (on average 1.346676737160121) internal successors, (3566), 2706 states have internal predecessors, (3566), 947 states have call successors, (947), 155 states have call predecessors, (947), 154 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:11:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 5457 transitions. [2021-11-12 23:11:01,549 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 5457 transitions. Word has length 75 [2021-11-12 23:11:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 3752 states and 5457 transitions. [2021-11-12 23:11:01,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 5457 transitions. [2021-11-12 23:11:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:11:01,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:01,551 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] [2021-11-12 23:11:01,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:01,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:01,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:01,971 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 23:11:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash 239279715, now seen corresponding path program 1 times [2021-11-12 23:11:01,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:01,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043821840] [2021-11-12 23:11:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:01,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:01,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:01,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:11:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:05,966 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 23:11:05,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:06,266 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 23:11:06,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:06,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043821840] [2021-11-12 23:11:06,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043821840] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:06,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:06,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:06,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988453147] [2021-11-12 23:11:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:06,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:06,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:06,269 INFO L87 Difference]: Start difference. First operand 3752 states and 5457 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:06,677 INFO L93 Difference]: Finished difference Result 3758 states and 5462 transitions. [2021-11-12 23:11:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 73 [2021-11-12 23:11:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:06,711 INFO L225 Difference]: With dead ends: 3758 [2021-11-12 23:11:06,711 INFO L226 Difference]: Without dead ends: 3756 [2021-11-12 23:11:06,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:06,716 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5420 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:06,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5420 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 28.90ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 69.43ms Time] [2021-11-12 23:11:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-11-12 23:11:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3756. [2021-11-12 23:11:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3756 states, 2651 states have (on average 1.3462844209732177) internal successors, (3569), 2709 states have internal predecessors, (3569), 947 states have call successors, (947), 156 states have call predecessors, (947), 155 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:11:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3756 states to 3756 states and 5460 transitions. [2021-11-12 23:11:07,018 INFO L78 Accepts]: Start accepts. Automaton has 3756 states and 5460 transitions. Word has length 73 [2021-11-12 23:11:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:07,019 INFO L470 AbstractCegarLoop]: Abstraction has 3756 states and 5460 transitions. [2021-11-12 23:11:07,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3756 states and 5460 transitions. [2021-11-12 23:11:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:11:07,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:07,021 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] [2021-11-12 23:11:07,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:07,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:07,246 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 23:11:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1945982123, now seen corresponding path program 1 times [2021-11-12 23:11:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:07,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386818430] [2021-11-12 23:11:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:07,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:07,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:07,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:11:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:11:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:11:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:11:12,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:12,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386818430] [2021-11-12 23:11:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386818430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:12,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349902846] [2021-11-12 23:11:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:12,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:12,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:12,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:11:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:14,802 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 23:11:14,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:15,293 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 23:11:15,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349902846] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:15,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:11:15,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:11:15,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654007282] [2021-11-12 23:11:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:15,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:15,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:11:15,296 INFO L87 Difference]: Start difference. First operand 3756 states and 5460 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:15,796 INFO L93 Difference]: Finished difference Result 3762 states and 5465 transitions. [2021-11-12 23:11:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 85 [2021-11-12 23:11:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:15,849 INFO L225 Difference]: With dead ends: 3762 [2021-11-12 23:11:15,849 INFO L226 Difference]: Without dead ends: 3760 [2021-11-12 23:11:15,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:11:15,854 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5406 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5412 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:15,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5412 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 27.62ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 55.95ms Time] [2021-11-12 23:11:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-11-12 23:11:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3760. [2021-11-12 23:11:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 2654 states have (on average 1.3458929917106255) internal successors, (3572), 2712 states have internal predecessors, (3572), 947 states have call successors, (947), 157 states have call predecessors, (947), 156 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2021-11-12 23:11:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5463 transitions. [2021-11-12 23:11:16,252 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5463 transitions. Word has length 85 [2021-11-12 23:11:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 3760 states and 5463 transitions. [2021-11-12 23:11:16,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5463 transitions. [2021-11-12 23:11:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:11:16,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:16,254 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] [2021-11-12 23:11:16,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:16,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:16,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:16,679 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 23:11:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -770746781, now seen corresponding path program 1 times [2021-11-12 23:11:16,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:16,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216686648] [2021-11-12 23:11:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:16,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:16,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:16,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:11:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:20,657 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 23:11:20,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:20,984 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 23:11:20,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:20,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216686648] [2021-11-12 23:11:20,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216686648] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:20,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:20,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:20,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361473254] [2021-11-12 23:11:20,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:20,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:20,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:20,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:20,987 INFO L87 Difference]: Start difference. First operand 3760 states and 5463 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:21,412 INFO L93 Difference]: Finished difference Result 4055 states and 5823 transitions. [2021-11-12 23:11:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 83 [2021-11-12 23:11:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:21,436 INFO L225 Difference]: With dead ends: 4055 [2021-11-12 23:11:21,436 INFO L226 Difference]: Without dead ends: 4053 [2021-11-12 23:11:21,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:21,440 INFO L933 BasicCegarLoop]: 5550 mSDtfsCounter, 5130 mSDsluCounter, 11714 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5135 SdHoareTripleChecker+Valid, 17264 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:21,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5135 Valid, 17264 Invalid, 23 Unknown, 0 Unchecked, 40.56ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 60.90ms Time] [2021-11-12 23:11:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-11-12 23:11:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 4047. [2021-11-12 23:11:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 2852 states have (on average 1.3369565217391304) internal successors, (3813), 2917 states have internal predecessors, (3813), 1003 states have call successors, (1003), 193 states have call predecessors, (1003), 189 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-12 23:11:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5817 transitions. [2021-11-12 23:11:21,793 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5817 transitions. Word has length 83 [2021-11-12 23:11:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:21,794 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 5817 transitions. [2021-11-12 23:11:21,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5817 transitions. [2021-11-12 23:11:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:11:21,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:21,797 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] [2021-11-12 23:11:21,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:22,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:22,022 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 23:11:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1623913731, now seen corresponding path program 1 times [2021-11-12 23:11:22,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:22,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526931974] [2021-11-12 23:11:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:22,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:22,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:22,026 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:22,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:11:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:25,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:25,989 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 23:11:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:26,328 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 23:11:26,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:26,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526931974] [2021-11-12 23:11:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526931974] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:26,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:26,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:26,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16768517] [2021-11-12 23:11:26,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:26,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:26,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:26,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:26,331 INFO L87 Difference]: Start difference. First operand 4047 states and 5817 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:26,788 INFO L93 Difference]: Finished difference Result 4053 states and 5822 transitions. [2021-11-12 23:11:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 88 [2021-11-12 23:11:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:26,811 INFO L225 Difference]: With dead ends: 4053 [2021-11-12 23:11:26,811 INFO L226 Difference]: Without dead ends: 4051 [2021-11-12 23:11:26,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:26,819 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5417 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:26,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5417 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 29.77ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 69.51ms Time] [2021-11-12 23:11:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-11-12 23:11:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 4051. [2021-11-12 23:11:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4051 states, 2855 states have (on average 1.3366024518388793) internal successors, (3816), 2920 states have internal predecessors, (3816), 1003 states have call successors, (1003), 194 states have call predecessors, (1003), 190 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-12 23:11:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 5820 transitions. [2021-11-12 23:11:27,170 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 5820 transitions. Word has length 88 [2021-11-12 23:11:27,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:27,170 INFO L470 AbstractCegarLoop]: Abstraction has 4051 states and 5820 transitions. [2021-11-12 23:11:27,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 5820 transitions. [2021-11-12 23:11:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:11:27,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:27,173 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] [2021-11-12 23:11:27,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:27,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:27,386 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 23:11:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1787102325, now seen corresponding path program 1 times [2021-11-12 23:11:27,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:27,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464668719] [2021-11-12 23:11:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:27,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:27,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:27,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:27,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:11:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:11:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-12 23:11:31,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-12 23:11:32,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:32,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464668719] [2021-11-12 23:11:32,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464668719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:11:32,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819171933] [2021-11-12 23:11:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:32,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:11:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:11:32,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:11:32,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:11:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:35,256 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 23:11:35,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:35,802 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 23:11:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819171933] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:35,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:11:35,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 15, 4] total 23 [2021-11-12 23:11:35,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557818440] [2021-11-12 23:11:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:35,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:35,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:11:35,805 INFO L87 Difference]: Start difference. First operand 4051 states and 5820 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:36,355 INFO L93 Difference]: Finished difference Result 4057 states and 5825 transitions. [2021-11-12 23:11:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:36,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 100 [2021-11-12 23:11:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:36,377 INFO L225 Difference]: With dead ends: 4057 [2021-11-12 23:11:36,377 INFO L226 Difference]: Without dead ends: 4055 [2021-11-12 23:11:36,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:11:36,382 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5406 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5409 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:36,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5409 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 29.61ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 56.71ms Time] [2021-11-12 23:11:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-11-12 23:11:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 4055. [2021-11-12 23:11:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4055 states, 2858 states have (on average 1.3362491252624213) internal successors, (3819), 2923 states have internal predecessors, (3819), 1003 states have call successors, (1003), 195 states have call predecessors, (1003), 191 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-12 23:11:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 5823 transitions. [2021-11-12 23:11:36,742 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 5823 transitions. Word has length 100 [2021-11-12 23:11:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:36,743 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 5823 transitions. [2021-11-12 23:11:36,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 23:11:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 5823 transitions. [2021-11-12 23:11:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:11:36,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:36,746 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] [2021-11-12 23:11:36,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:36,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:11:37,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:37,162 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 23:11:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1137201789, now seen corresponding path program 1 times [2021-11-12 23:11:37,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:37,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749517437] [2021-11-12 23:11:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:37,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:37,166 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:37,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:11:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:40,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:41,311 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 23:11:41,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:41,667 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 23:11:41,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:41,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749517437] [2021-11-12 23:11:41,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749517437] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:41,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:41,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:41,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253619603] [2021-11-12 23:11:41,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:41,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:41,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:41,670 INFO L87 Difference]: Start difference. First operand 4055 states and 5823 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:42,073 INFO L93 Difference]: Finished difference Result 4061 states and 5828 transitions. [2021-11-12 23:11:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 98 [2021-11-12 23:11:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:42,096 INFO L225 Difference]: With dead ends: 4061 [2021-11-12 23:11:42,097 INFO L226 Difference]: Without dead ends: 4059 [2021-11-12 23:11:42,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:42,100 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5415 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.09ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:42,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5415 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 22.09ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 68.35ms Time] [2021-11-12 23:11:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-11-12 23:11:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 4059. [2021-11-12 23:11:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 2861 states have (on average 1.3358965396714435) internal successors, (3822), 2926 states have internal predecessors, (3822), 1003 states have call successors, (1003), 196 states have call predecessors, (1003), 192 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-12 23:11:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 5826 transitions. [2021-11-12 23:11:42,517 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 5826 transitions. Word has length 98 [2021-11-12 23:11:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:42,518 INFO L470 AbstractCegarLoop]: Abstraction has 4059 states and 5826 transitions. [2021-11-12 23:11:42,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 5826 transitions. [2021-11-12 23:11:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:11:42,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:42,520 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] [2021-11-12 23:11:42,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:42,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:42,734 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 23:11:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1301359005, now seen corresponding path program 1 times [2021-11-12 23:11:42,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:42,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963198123] [2021-11-12 23:11:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:42,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:42,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:42,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:11:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:47,033 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 23:11:47,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:47,423 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 23:11:47,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:47,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963198123] [2021-11-12 23:11:47,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963198123] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:47,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:47,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:47,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656737566] [2021-11-12 23:11:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:47,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:47,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:47,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:47,425 INFO L87 Difference]: Start difference. First operand 4059 states and 5826 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:47,812 INFO L93 Difference]: Finished difference Result 4065 states and 5831 transitions. [2021-11-12 23:11:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 103 [2021-11-12 23:11:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:47,832 INFO L225 Difference]: With dead ends: 4065 [2021-11-12 23:11:47,833 INFO L226 Difference]: Without dead ends: 4061 [2021-11-12 23:11:47,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:47,837 INFO L933 BasicCegarLoop]: 5442 mSDtfsCounter, 5413 mSDsluCounter, 10864 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5414 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:47,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5414 Valid, 16306 Invalid, 21 Unknown, 0 Unchecked, 19.97ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 65.46ms Time] [2021-11-12 23:11:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-12 23:11:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 4061. [2021-11-12 23:11:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 2863 states have (on average 1.33531260915124) internal successors, (3823), 2927 states have internal predecessors, (3823), 1003 states have call successors, (1003), 197 states have call predecessors, (1003), 192 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2021-11-12 23:11:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 5827 transitions. [2021-11-12 23:11:48,221 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 5827 transitions. Word has length 103 [2021-11-12 23:11:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:48,222 INFO L470 AbstractCegarLoop]: Abstraction has 4061 states and 5827 transitions. [2021-11-12 23:11:48,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 5827 transitions. [2021-11-12 23:11:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:11:48,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:48,225 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] [2021-11-12 23:11:48,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:48,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:48,438 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 23:11:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:48,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1896224259, now seen corresponding path program 1 times [2021-11-12 23:11:48,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:48,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113731982] [2021-11-12 23:11:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:48,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:48,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:48,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:11:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:11:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:52,624 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 23:11:52,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:53,010 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 23:11:53,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:53,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113731982] [2021-11-12 23:11:53,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113731982] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:11:53,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:11:53,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:11:53,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656434377] [2021-11-12 23:11:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:53,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:11:53,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:11:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:11:53,013 INFO L87 Difference]: Start difference. First operand 4061 states and 5827 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:53,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:53,402 INFO L93 Difference]: Finished difference Result 4061 states and 5827 transitions. [2021-11-12 23:11:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:11:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 108 [2021-11-12 23:11:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:53,422 INFO L225 Difference]: With dead ends: 4061 [2021-11-12 23:11:53,422 INFO L226 Difference]: Without dead ends: 3968 [2021-11-12 23:11:53,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:11:53,426 INFO L933 BasicCegarLoop]: 5440 mSDtfsCounter, 5409 mSDsluCounter, 10863 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5409 SdHoareTripleChecker+Valid, 16303 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:53,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5409 Valid, 16303 Invalid, 16 Unknown, 0 Unchecked, 20.91ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 42.19ms Time] [2021-11-12 23:11:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-11-12 23:11:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2021-11-12 23:11:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 2805 states have (on average 1.3411764705882352) internal successors, (3762), 2867 states have internal predecessors, (3762), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-12 23:11:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 5725 transitions. [2021-11-12 23:11:53,891 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 5725 transitions. Word has length 108 [2021-11-12 23:11:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:53,891 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 5725 transitions. [2021-11-12 23:11:53,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 23:11:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 5725 transitions. [2021-11-12 23:11:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 23:11:53,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:53,905 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:11:53,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:54,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:54,121 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:11:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1429581440, now seen corresponding path program 1 times [2021-11-12 23:11:54,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:54,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103622442] [2021-11-12 23:11:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:54,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:54,125 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:54,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:11:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 23:11:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-12 23:11:59,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-12 23:12:01,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:01,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103622442] [2021-11-12 23:12:01,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103622442] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:12:01,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:12:01,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 19 [2021-11-12 23:12:01,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722627763] [2021-11-12 23:12:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:01,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:12:01,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:12:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:12:01,542 INFO L87 Difference]: Start difference. First operand 3968 states and 5725 transitions. Second operand has 12 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:12:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:03,688 INFO L93 Difference]: Finished difference Result 7925 states and 11434 transitions. [2021-11-12 23:12:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:12:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) Word has length 181 [2021-11-12 23:12:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:03,719 INFO L225 Difference]: With dead ends: 7925 [2021-11-12 23:12:03,720 INFO L226 Difference]: Without dead ends: 3970 [2021-11-12 23:12:03,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:12:03,754 INFO L933 BasicCegarLoop]: 5343 mSDtfsCounter, 750 mSDsluCounter, 47141 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1146.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 52484 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1267.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:03,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 52484 Invalid, 352 Unknown, 0 Unchecked, 73.33ms Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1267.27ms Time] [2021-11-12 23:12:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-11-12 23:12:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3968. [2021-11-12 23:12:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 2805 states have (on average 1.3408199643493761) internal successors, (3761), 2866 states have internal predecessors, (3761), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-12 23:12:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 5724 transitions. [2021-11-12 23:12:04,166 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 5724 transitions. Word has length 181 [2021-11-12 23:12:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:04,167 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 5724 transitions. [2021-11-12 23:12:04,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (22), 6 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-12 23:12:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 5724 transitions. [2021-11-12 23:12:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:12:04,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:04,181 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:04,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:04,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:04,406 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:12:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash -470737409, now seen corresponding path program 1 times [2021-11-12 23:12:04,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:04,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305471154] [2021-11-12 23:12:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:04,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:04,410 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:04,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:12:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:12:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-12 23:12:09,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-12 23:12:09,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:09,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305471154] [2021-11-12 23:12:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305471154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:09,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:09,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:12:09,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245803160] [2021-11-12 23:12:09,838 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:09,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:12:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:12:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:09,841 INFO L87 Difference]: Start difference. First operand 3968 states and 5724 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 23:12:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:10,099 INFO L93 Difference]: Finished difference Result 7918 states and 11423 transitions. [2021-11-12 23:12:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:12:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 184 [2021-11-12 23:12:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:10,116 INFO L225 Difference]: With dead ends: 7918 [2021-11-12 23:12:10,116 INFO L226 Difference]: Without dead ends: 3967 [2021-11-12 23:12:10,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 365 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 23:12:10,145 INFO L933 BasicCegarLoop]: 5369 mSDtfsCounter, 5323 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5323 SdHoareTripleChecker+Valid, 5369 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:10,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5323 Valid, 5369 Invalid, 1 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 2.29ms Time] [2021-11-12 23:12:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-11-12 23:12:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3967. [2021-11-12 23:12:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3967 states, 2804 states have (on average 1.340228245363766) internal successors, (3758), 2865 states have internal predecessors, (3758), 981 states have call successors, (981), 183 states have call predecessors, (981), 180 states have return successors, (982), 961 states have call predecessors, (982), 981 states have call successors, (982) [2021-11-12 23:12:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3967 states to 3967 states and 5721 transitions. [2021-11-12 23:12:10,571 INFO L78 Accepts]: Start accepts. Automaton has 3967 states and 5721 transitions. Word has length 184 [2021-11-12 23:12:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:10,572 INFO L470 AbstractCegarLoop]: Abstraction has 3967 states and 5721 transitions. [2021-11-12 23:12:10,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-12 23:12:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3967 states and 5721 transitions. [2021-11-12 23:12:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:12:10,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:10,585 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:10,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:10,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:10,806 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:12:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1220117963, now seen corresponding path program 1 times [2021-11-12 23:12:10,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:10,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158767182] [2021-11-12 23:12:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:10,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:10,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:10,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:10,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:12:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:12:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-12 23:12:15,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-12 23:12:17,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158767182] [2021-11-12 23:12:17,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158767182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:17,018 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:17,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 21 [2021-11-12 23:12:17,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731019544] [2021-11-12 23:12:17,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:17,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:12:17,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:12:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:12:17,020 INFO L87 Difference]: Start difference. First operand 3967 states and 5721 transitions. Second operand has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 8 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:12:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:24,053 INFO L93 Difference]: Finished difference Result 9874 states and 14361 transitions. [2021-11-12 23:12:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 23:12:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 8 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 185 [2021-11-12 23:12:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:24,072 INFO L225 Difference]: With dead ends: 9874 [2021-11-12 23:12:24,072 INFO L226 Difference]: Without dead ends: 5922 [2021-11-12 23:12:24,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:12:24,089 INFO L933 BasicCegarLoop]: 6964 mSDtfsCounter, 4621 mSDsluCounter, 87904 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4169.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4757 SdHoareTripleChecker+Valid, 94868 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 120.43ms SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4606.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4757 Valid, 94868 Invalid, 2405 Unknown, 0 Unchecked, 120.43ms Time], IncrementalHoareTripleChecker [1133 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 4606.31ms Time] [2021-11-12 23:12:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-11-12 23:12:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 3975. [2021-11-12 23:12:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3975 states, 2810 states have (on average 1.3395017793594306) internal successors, (3764), 2871 states have internal predecessors, (3764), 983 states have call successors, (983), 183 states have call predecessors, (983), 180 states have return successors, (984), 963 states have call predecessors, (984), 983 states have call successors, (984) [2021-11-12 23:12:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3975 states to 3975 states and 5731 transitions. [2021-11-12 23:12:24,600 INFO L78 Accepts]: Start accepts. Automaton has 3975 states and 5731 transitions. Word has length 185 [2021-11-12 23:12:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:24,601 INFO L470 AbstractCegarLoop]: Abstraction has 3975 states and 5731 transitions. [2021-11-12 23:12:24,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 8 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:12:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3975 states and 5731 transitions. [2021-11-12 23:12:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-12 23:12:24,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:24,616 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:24,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:24,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:24,838 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:12:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1326465615, now seen corresponding path program 1 times [2021-11-12 23:12:24,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:24,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150880395] [2021-11-12 23:12:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:24,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:24,844 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:24,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:12:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:12:28,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-12 23:12:29,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-12 23:12:31,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:31,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150880395] [2021-11-12 23:12:31,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150880395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:31,389 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:31,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-12 23:12:31,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712414768] [2021-11-12 23:12:31,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:31,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 23:12:31,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 23:12:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:12:31,391 INFO L87 Difference]: Start difference. First operand 3975 states and 5731 transitions. Second operand has 23 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 10 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-12 23:12:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:41,536 INFO L93 Difference]: Finished difference Result 9923 states and 14422 transitions. [2021-11-12 23:12:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:12:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 10 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 213 [2021-11-12 23:12:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:41,556 INFO L225 Difference]: With dead ends: 9923 [2021-11-12 23:12:41,556 INFO L226 Difference]: Without dead ends: 5963 [2021-11-12 23:12:41,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=627, Invalid=3155, Unknown=0, NotChecked=0, Total=3782 [2021-11-12 23:12:41,570 INFO L933 BasicCegarLoop]: 7407 mSDtfsCounter, 4285 mSDsluCounter, 121696 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5765.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4420 SdHoareTripleChecker+Valid, 129103 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 137.87ms SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6305.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:41,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4420 Valid, 129103 Invalid, 3089 Unknown, 0 Unchecked, 137.87ms Time], IncrementalHoareTripleChecker [1211 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 6305.29ms Time] [2021-11-12 23:12:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2021-11-12 23:12:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 3975. [2021-11-12 23:12:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3975 states, 2810 states have (on average 1.3395017793594306) internal successors, (3764), 2871 states have internal predecessors, (3764), 983 states have call successors, (983), 183 states have call predecessors, (983), 180 states have return successors, (984), 963 states have call predecessors, (984), 983 states have call successors, (984) [2021-11-12 23:12:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3975 states to 3975 states and 5731 transitions. [2021-11-12 23:12:42,106 INFO L78 Accepts]: Start accepts. Automaton has 3975 states and 5731 transitions. Word has length 213 [2021-11-12 23:12:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:42,106 INFO L470 AbstractCegarLoop]: Abstraction has 3975 states and 5731 transitions. [2021-11-12 23:12:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 10 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-12 23:12:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3975 states and 5731 transitions. [2021-11-12 23:12:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-12 23:12:42,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:42,123 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:12:42,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:42,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:42,338 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:12:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1170750328, now seen corresponding path program 1 times [2021-11-12 23:12:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:42,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506123290] [2021-11-12 23:12:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:42,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:42,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:42,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:42,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:12:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2399 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:12:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 23:12:47,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-11-12 23:12:48,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:48,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506123290] [2021-11-12 23:12:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506123290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:48,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:48,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:12:48,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595116843] [2021-11-12 23:12:48,779 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:48,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:12:48,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:12:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:12:48,781 INFO L87 Difference]: Start difference. First operand 3975 states and 5731 transitions. Second operand has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-12 23:12:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:49,425 INFO L93 Difference]: Finished difference Result 7987 states and 11511 transitions. [2021-11-12 23:12:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:12:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 339 [2021-11-12 23:12:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:49,441 INFO L225 Difference]: With dead ends: 7987 [2021-11-12 23:12:49,441 INFO L226 Difference]: Without dead ends: 4029 [2021-11-12 23:12:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:12:49,459 INFO L933 BasicCegarLoop]: 5405 mSDtfsCounter, 113 mSDsluCounter, 21557 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 26962 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.84ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:49,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 26962 Invalid, 67 Unknown, 0 Unchecked, 20.84ms Time], IncrementalHoareTripleChecker [38 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 209.80ms Time] [2021-11-12 23:12:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-11-12 23:12:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 3978. [2021-11-12 23:12:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 2813 states have (on average 1.3391397084962673) internal successors, (3767), 2874 states have internal predecessors, (3767), 983 states have call successors, (983), 183 states have call predecessors, (983), 180 states have return successors, (984), 963 states have call predecessors, (984), 983 states have call successors, (984) [2021-11-12 23:12:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5734 transitions. [2021-11-12 23:12:49,944 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5734 transitions. Word has length 339 [2021-11-12 23:12:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:49,945 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5734 transitions. [2021-11-12 23:12:49,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-12 23:12:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5734 transitions. [2021-11-12 23:12:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-12 23:12:49,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:49,962 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-12 23:12:50,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:50,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:50,184 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 23:12:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2031696236, now seen corresponding path program 1 times [2021-11-12 23:12:50,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:50,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906845469] [2021-11-12 23:12:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:50,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:50,190 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:50,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:12:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:12:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-12 23:12:55,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-11-12 23:12:56,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:56,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906845469] [2021-11-12 23:12:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906845469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:56,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:56,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:12:56,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520197459] [2021-11-12 23:12:56,791 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:56,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:56,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:56,793 INFO L87 Difference]: Start difference. First operand 3978 states and 5734 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:12:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:57,294 INFO L93 Difference]: Finished difference Result 7955 states and 11473 transitions. [2021-11-12 23:12:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 360 [2021-11-12 23:12:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:57,309 INFO L225 Difference]: With dead ends: 7955 [2021-11-12 23:12:57,309 INFO L226 Difference]: Without dead ends: 3994 [2021-11-12 23:12:57,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:57,327 INFO L933 BasicCegarLoop]: 5371 mSDtfsCounter, 14 mSDsluCounter, 5369 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10740 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.65ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:57,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10740 Invalid, 26 Unknown, 0 Unchecked, 8.65ms Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 92.28ms Time] [2021-11-12 23:12:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-11-12 23:12:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3983. [2021-11-12 23:12:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 2817 states have (on average 1.3386581469648562) internal successors, (3771), 2878 states have internal predecessors, (3771), 984 states have call successors, (984), 183 states have call predecessors, (984), 180 states have return successors, (985), 964 states have call predecessors, (985), 984 states have call successors, (985) [2021-11-12 23:12:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 5740 transitions. [2021-11-12 23:12:57,728 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 5740 transitions. Word has length 360 [2021-11-12 23:12:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:57,728 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 5740 transitions. [2021-11-12 23:12:57,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:12:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 5740 transitions. [2021-11-12 23:12:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-12 23:12:57,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:57,746 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-12 23:12:57,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:57,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:57,970 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 23:12:57,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1194109018, now seen corresponding path program 1 times [2021-11-12 23:12:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:57,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144226702] [2021-11-12 23:12:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:57,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:57,974 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:57,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:13:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:13:02,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-12 23:13:03,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-11-12 23:13:04,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:04,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144226702] [2021-11-12 23:13:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144226702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:04,634 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:04,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:13:04,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682327480] [2021-11-12 23:13:04,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:04,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:13:04,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:04,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:13:04,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:13:04,637 INFO L87 Difference]: Start difference. First operand 3983 states and 5740 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:13:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:05,137 INFO L93 Difference]: Finished difference Result 7957 states and 11472 transitions. [2021-11-12 23:13:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:13:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 362 [2021-11-12 23:13:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:05,149 INFO L225 Difference]: With dead ends: 7957 [2021-11-12 23:13:05,149 INFO L226 Difference]: Without dead ends: 3991 [2021-11-12 23:13:05,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 720 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 23:13:05,158 INFO L933 BasicCegarLoop]: 5367 mSDtfsCounter, 5 mSDsluCounter, 10721 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16088 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.87ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:05,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 16088 Invalid, 25 Unknown, 0 Unchecked, 13.87ms Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 68.88ms Time] [2021-11-12 23:13:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3991 states. [2021-11-12 23:13:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3991 to 3990. [2021-11-12 23:13:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 2823 states have (on average 1.338646829613886) internal successors, (3779), 2884 states have internal predecessors, (3779), 985 states have call successors, (985), 183 states have call predecessors, (985), 180 states have return successors, (986), 965 states have call predecessors, (986), 985 states have call successors, (986) [2021-11-12 23:13:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 5750 transitions. [2021-11-12 23:13:05,487 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 5750 transitions. Word has length 362 [2021-11-12 23:13:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 3990 states and 5750 transitions. [2021-11-12 23:13:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:13:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 5750 transitions. [2021-11-12 23:13:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-12 23:13:05,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:05,504 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:13:05,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:05,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:05,718 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 23:13:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1758648703, now seen corresponding path program 1 times [2021-11-12 23:13:05,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:05,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320188244] [2021-11-12 23:13:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:05,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:05,724 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:05,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:13:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:13:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-12 23:13:11,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2021-11-12 23:13:12,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:12,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320188244] [2021-11-12 23:13:12,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320188244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:12,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:12,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:13:12,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450929904] [2021-11-12 23:13:12,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:12,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:13:12,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:13:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:13:12,694 INFO L87 Difference]: Start difference. First operand 3990 states and 5750 transitions. Second operand has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (71), 4 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:13:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:13,370 INFO L93 Difference]: Finished difference Result 8096 states and 11669 transitions. [2021-11-12 23:13:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:13:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (71), 4 states have call predecessors, (71), 2 states have call successors, (71) Word has length 363 [2021-11-12 23:13:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:13,390 INFO L225 Difference]: With dead ends: 8096 [2021-11-12 23:13:13,390 INFO L226 Difference]: Without dead ends: 4123 [2021-11-12 23:13:13,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:13,402 INFO L933 BasicCegarLoop]: 5505 mSDtfsCounter, 124 mSDsluCounter, 38304 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 43809 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.13ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:13,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 43809 Invalid, 57 Unknown, 0 Unchecked, 32.13ms Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 239.69ms Time] [2021-11-12 23:13:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-11-12 23:13:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3995. [2021-11-12 23:13:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3995 states, 2827 states have (on average 1.3381676689069686) internal successors, (3783), 2888 states have internal predecessors, (3783), 985 states have call successors, (985), 183 states have call predecessors, (985), 181 states have return successors, (990), 966 states have call predecessors, (990), 985 states have call successors, (990) [2021-11-12 23:13:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 5758 transitions. [2021-11-12 23:13:13,869 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 5758 transitions. Word has length 363 [2021-11-12 23:13:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:13,870 INFO L470 AbstractCegarLoop]: Abstraction has 3995 states and 5758 transitions. [2021-11-12 23:13:13,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 8 states have internal predecessors, (184), 2 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (71), 4 states have call predecessors, (71), 2 states have call successors, (71) [2021-11-12 23:13:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 5758 transitions. [2021-11-12 23:13:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-12 23:13:13,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:13,883 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:14,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:14,102 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 23:13:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -725459067, now seen corresponding path program 1 times [2021-11-12 23:13:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:14,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501563936] [2021-11-12 23:13:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:14,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:14,106 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:14,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:13:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 2485 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:13:19,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-12 23:13:19,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-12 23:13:20,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:20,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501563936] [2021-11-12 23:13:20,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501563936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:20,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:20,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:13:20,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466087797] [2021-11-12 23:13:20,745 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:20,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:20,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:13:20,747 INFO L87 Difference]: Start difference. First operand 3995 states and 5758 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-12 23:13:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:21,224 INFO L93 Difference]: Finished difference Result 7978 states and 11501 transitions. [2021-11-12 23:13:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 380 [2021-11-12 23:13:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:21,243 INFO L225 Difference]: With dead ends: 7978 [2021-11-12 23:13:21,243 INFO L226 Difference]: Without dead ends: 4000 [2021-11-12 23:13:21,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:13:21,255 INFO L933 BasicCegarLoop]: 5369 mSDtfsCounter, 4 mSDsluCounter, 16097 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21466 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.57ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:21,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 21466 Invalid, 22 Unknown, 0 Unchecked, 15.57ms Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 102.08ms Time] [2021-11-12 23:13:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-11-12 23:13:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 4000. [2021-11-12 23:13:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 2831 states have (on average 1.3376898622394913) internal successors, (3787), 2891 states have internal predecessors, (3787), 986 states have call successors, (986), 183 states have call predecessors, (986), 181 states have return successors, (991), 967 states have call predecessors, (991), 986 states have call successors, (991) [2021-11-12 23:13:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 5764 transitions. [2021-11-12 23:13:21,703 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 5764 transitions. Word has length 380 [2021-11-12 23:13:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 5764 transitions. [2021-11-12 23:13:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-12 23:13:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 5764 transitions. [2021-11-12 23:13:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-12 23:13:21,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:21,716 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-12 23:13:21,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:21,930 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 23:13:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash 845767479, now seen corresponding path program 1 times [2021-11-12 23:13:21,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:21,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677945036] [2021-11-12 23:13:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:21,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:21,934 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:13:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:13:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 194 proven. 7 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-12 23:13:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2021-11-12 23:13:28,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:28,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677945036] [2021-11-12 23:13:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677945036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:13:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291749460] [2021-11-12 23:13:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:28,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:13:28,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:13:28,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:13:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:13:30,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2021-11-12 23:13:31,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-11-12 23:13:32,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [291749460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:32,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:13:32,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-12 23:13:32,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028223174] [2021-11-12 23:13:32,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:32,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:32,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:13:32,597 INFO L87 Difference]: Start difference. First operand 4000 states and 5764 transitions. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 23:13:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:33,605 INFO L93 Difference]: Finished difference Result 8237 states and 11868 transitions. [2021-11-12 23:13:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:13:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 391 [2021-11-12 23:13:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:33,620 INFO L225 Difference]: With dead ends: 8237 [2021-11-12 23:13:33,620 INFO L226 Difference]: Without dead ends: 4254 [2021-11-12 23:13:33,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1551 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:13:33,632 INFO L933 BasicCegarLoop]: 5546 mSDtfsCounter, 237 mSDsluCounter, 16382 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 21928 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.32ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 21928 Invalid, 157 Unknown, 0 Unchecked, 18.32ms Time], IncrementalHoareTripleChecker [65 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 450.77ms Time] [2021-11-12 23:13:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-11-12 23:13:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 4002. [2021-11-12 23:13:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 2833 states have (on average 1.337451464878221) internal successors, (3789), 2893 states have internal predecessors, (3789), 986 states have call successors, (986), 183 states have call predecessors, (986), 181 states have return successors, (991), 967 states have call predecessors, (991), 986 states have call successors, (991) [2021-11-12 23:13:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5766 transitions. [2021-11-12 23:13:34,289 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5766 transitions. Word has length 391 [2021-11-12 23:13:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:34,289 INFO L470 AbstractCegarLoop]: Abstraction has 4002 states and 5766 transitions. [2021-11-12 23:13:34,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 23:13:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5766 transitions. [2021-11-12 23:13:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-12 23:13:34,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:34,300 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:34,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:34,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-12 23:13:34,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:34,714 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 23:13:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash -941927045, now seen corresponding path program 1 times [2021-11-12 23:13:34,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:34,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403440662] [2021-11-12 23:13:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:34,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:34,719 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:13:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:13:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 129 proven. 7 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-12 23:13:41,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-12 23:13:43,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:43,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403440662] [2021-11-12 23:13:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403440662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:13:43,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841150361] [2021-11-12 23:13:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:43,250 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:13:43,251 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:13:43,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 23:13:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:13:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-11-12 23:13:46,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2021-11-12 23:13:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1841150361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:47,660 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:13:47,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:13:47,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864595153] [2021-11-12 23:13:47,661 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:47,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:13:47,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:13:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:47,663 INFO L87 Difference]: Start difference. First operand 4002 states and 5766 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 23:13:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:48,301 INFO L93 Difference]: Finished difference Result 8686 states and 12556 transitions. [2021-11-12 23:13:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:13:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 504 [2021-11-12 23:13:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:48,325 INFO L225 Difference]: With dead ends: 8686 [2021-11-12 23:13:48,325 INFO L226 Difference]: Without dead ends: 4701 [2021-11-12 23:13:48,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2012 GetRequests, 2003 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:13:48,343 INFO L933 BasicCegarLoop]: 6318 mSDtfsCounter, 727 mSDsluCounter, 5505 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 11823 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:48,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 11823 Invalid, 7 Unknown, 0 Unchecked, 14.21ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 44.81ms Time] [2021-11-12 23:13:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-11-12 23:13:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4004. [2021-11-12 23:13:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4004 states, 2835 states have (on average 1.3375661375661376) internal successors, (3792), 2895 states have internal predecessors, (3792), 986 states have call successors, (986), 183 states have call predecessors, (986), 181 states have return successors, (991), 967 states have call predecessors, (991), 986 states have call successors, (991) [2021-11-12 23:13:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4004 states to 4004 states and 5769 transitions. [2021-11-12 23:13:48,964 INFO L78 Accepts]: Start accepts. Automaton has 4004 states and 5769 transitions. Word has length 504 [2021-11-12 23:13:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:48,966 INFO L470 AbstractCegarLoop]: Abstraction has 4004 states and 5769 transitions. [2021-11-12 23:13:48,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 23:13:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4004 states and 5769 transitions. [2021-11-12 23:13:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-11-12 23:13:48,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:48,982 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:13:49,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:49,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:49,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:49,408 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 23:13:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2030644208, now seen corresponding path program 1 times [2021-11-12 23:13:49,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:49,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147295986] [2021-11-12 23:13:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:49,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:49,416 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:49,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:13:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:13:55,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 120 proven. 7 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-12 23:13:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2021-11-12 23:13:57,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:57,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147295986] [2021-11-12 23:13:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147295986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:13:57,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430220177] [2021-11-12 23:13:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:57,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:13:57,782 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:13:57,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 23:13:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-12 23:14:01,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-11-12 23:14:02,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430220177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:02,299 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:14:02,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:14:02,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146677710] [2021-11-12 23:14:02,300 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:02,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:14:02,302 INFO L87 Difference]: Start difference. First operand 4004 states and 5769 transitions. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 23:14:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:03,827 INFO L93 Difference]: Finished difference Result 8867 states and 12828 transitions. [2021-11-12 23:14:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 500 [2021-11-12 23:14:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:03,850 INFO L225 Difference]: With dead ends: 8867 [2021-11-12 23:14:03,850 INFO L226 Difference]: Without dead ends: 4880 [2021-11-12 23:14:03,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1996 GetRequests, 1986 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:14:03,869 INFO L933 BasicCegarLoop]: 5746 mSDtfsCounter, 1418 mSDsluCounter, 10228 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 774.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 15974 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.82ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 891.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:03,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 15974 Invalid, 196 Unknown, 0 Unchecked, 17.82ms Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 891.10ms Time] [2021-11-12 23:14:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2021-11-12 23:14:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4023. [2021-11-12 23:14:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 2854 states have (on average 1.3391730903994394) internal successors, (3822), 2914 states have internal predecessors, (3822), 986 states have call successors, (986), 183 states have call predecessors, (986), 181 states have return successors, (991), 967 states have call predecessors, (991), 986 states have call successors, (991) [2021-11-12 23:14:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 5799 transitions. [2021-11-12 23:14:04,293 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 5799 transitions. Word has length 500 [2021-11-12 23:14:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:04,294 INFO L470 AbstractCegarLoop]: Abstraction has 4023 states and 5799 transitions. [2021-11-12 23:14:04,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 2 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 23:14:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 5799 transitions. [2021-11-12 23:14:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-11-12 23:14:04,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:04,310 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:04,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:04,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:04,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:04,718 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 23:14:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1255082592, now seen corresponding path program 1 times [2021-11-12 23:14:04,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:04,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614027013] [2021-11-12 23:14:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:04,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:04,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:04,724 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:04,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:14:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 120 proven. 7 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-12 23:14:11,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2021-11-12 23:14:13,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:13,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614027013] [2021-11-12 23:14:13,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614027013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:13,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790100660] [2021-11-12 23:14:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:13,155 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:13,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:14:13,156 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:14:13,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:14:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:14:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-11-12 23:14:16,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-11-12 23:14:17,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1790100660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:17,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:14:17,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 12 [2021-11-12 23:14:17,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767831146] [2021-11-12 23:14:17,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:17,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:17,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:14:17,715 INFO L87 Difference]: Start difference. First operand 4023 states and 5799 transitions. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 4 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2021-11-12 23:14:19,905 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 23:14:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:20,579 INFO L93 Difference]: Finished difference Result 8776 states and 12694 transitions. [2021-11-12 23:14:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:14:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 4 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 498 [2021-11-12 23:14:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:20,597 INFO L225 Difference]: With dead ends: 8776 [2021-11-12 23:14:20,597 INFO L226 Difference]: Without dead ends: 4770 [2021-11-12 23:14:20,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1989 GetRequests, 1978 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:14:20,614 INFO L933 BasicCegarLoop]: 6066 mSDtfsCounter, 826 mSDsluCounter, 11366 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2090.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 17432 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.17ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2125.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:20,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 17432 Invalid, 48 Unknown, 0 Unchecked, 20.17ms Time], IncrementalHoareTripleChecker [31 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2125.45ms Time] [2021-11-12 23:14:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-11-12 23:14:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4041. [2021-11-12 23:14:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4041 states, 2867 states have (on average 1.3390303453086851) internal successors, (3839), 2927 states have internal predecessors, (3839), 991 states have call successors, (991), 183 states have call predecessors, (991), 181 states have return successors, (996), 972 states have call predecessors, (996), 991 states have call successors, (996) [2021-11-12 23:14:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4041 states to 4041 states and 5826 transitions. [2021-11-12 23:14:20,979 INFO L78 Accepts]: Start accepts. Automaton has 4041 states and 5826 transitions. Word has length 498 [2021-11-12 23:14:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:20,980 INFO L470 AbstractCegarLoop]: Abstraction has 4041 states and 5826 transitions. [2021-11-12 23:14:20,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 4 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2021-11-12 23:14:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4041 states and 5826 transitions. [2021-11-12 23:14:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-12 23:14:20,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:20,988 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:21,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:21,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-12 23:14:21,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:21,388 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 23:14:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 315673145, now seen corresponding path program 1 times [2021-11-12 23:14:21,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:21,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975418075] [2021-11-12 23:14:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:21,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:21,393 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:21,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:14:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 120 proven. 7 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-12 23:14:28,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2021-11-12 23:14:29,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:29,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975418075] [2021-11-12 23:14:29,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975418075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:29,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198466879] [2021-11-12 23:14:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:29,838 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:14:29,839 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:14:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:14:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-12 23:14:33,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-11-12 23:14:33,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1198466879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:33,996 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:14:33,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-12 23:14:33,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800759004] [2021-11-12 23:14:33,997 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:33,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:33,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:14:33,998 INFO L87 Difference]: Start difference. First operand 4041 states and 5826 transitions. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-12 23:14:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:35,526 INFO L93 Difference]: Finished difference Result 9537 states and 13836 transitions. [2021-11-12 23:14:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 502 [2021-11-12 23:14:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:35,558 INFO L225 Difference]: With dead ends: 9537 [2021-11-12 23:14:35,559 INFO L226 Difference]: Without dead ends: 5513 [2021-11-12 23:14:35,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2004 GetRequests, 1994 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:14:35,579 INFO L933 BasicCegarLoop]: 6550 mSDtfsCounter, 1449 mSDsluCounter, 11546 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 743.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 18096 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.40ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 856.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:35,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 18096 Invalid, 179 Unknown, 0 Unchecked, 19.40ms Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 856.63ms Time] [2021-11-12 23:14:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-11-12 23:14:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 4047. [2021-11-12 23:14:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 2873 states have (on average 1.3390184476157327) internal successors, (3847), 2933 states have internal predecessors, (3847), 991 states have call successors, (991), 183 states have call predecessors, (991), 181 states have return successors, (996), 972 states have call predecessors, (996), 991 states have call successors, (996) [2021-11-12 23:14:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5834 transitions. [2021-11-12 23:14:36,177 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5834 transitions. Word has length 502 [2021-11-12 23:14:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:36,178 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 5834 transitions. [2021-11-12 23:14:36,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-12 23:14:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5834 transitions. [2021-11-12 23:14:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-12 23:14:36,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:36,186 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:36,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:36,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:36,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:36,587 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 23:14:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2079988280, now seen corresponding path program 1 times [2021-11-12 23:14:36,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:36,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000217840] [2021-11-12 23:14:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:36,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:36,592 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:36,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:14:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 129 proven. 7 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-12 23:14:44,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-12 23:14:45,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:45,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000217840] [2021-11-12 23:14:45,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000217840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:14:45,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1021385956] [2021-11-12 23:14:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:45,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:14:45,291 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:14:45,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:14:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 3028 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:14:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-12 23:14:48,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-12 23:14:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1021385956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:49,474 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:14:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 14 [2021-11-12 23:14:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364673257] [2021-11-12 23:14:49,475 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:14:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:14:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:14:49,476 INFO L87 Difference]: Start difference. First operand 4047 states and 5834 transitions. Second operand has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 2 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-12 23:14:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:50,708 INFO L93 Difference]: Finished difference Result 8981 states and 12987 transitions. [2021-11-12 23:14:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:14:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 2 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 511 [2021-11-12 23:14:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:50,721 INFO L225 Difference]: With dead ends: 8981 [2021-11-12 23:14:50,721 INFO L226 Difference]: Without dead ends: 4951 [2021-11-12 23:14:50,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2042 GetRequests, 2029 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:14:50,730 INFO L933 BasicCegarLoop]: 6411 mSDtfsCounter, 1761 mSDsluCounter, 18390 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 24801 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.36ms SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 536.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:50,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 24801 Invalid, 240 Unknown, 0 Unchecked, 21.36ms Time], IncrementalHoareTripleChecker [204 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 536.16ms Time] [2021-11-12 23:14:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-11-12 23:14:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4049. [2021-11-12 23:14:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 2875 states have (on average 1.3387826086956522) internal successors, (3849), 2935 states have internal predecessors, (3849), 991 states have call successors, (991), 183 states have call predecessors, (991), 181 states have return successors, (996), 972 states have call predecessors, (996), 991 states have call successors, (996) [2021-11-12 23:14:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 5836 transitions. [2021-11-12 23:14:51,125 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 5836 transitions. Word has length 511 [2021-11-12 23:14:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:51,126 INFO L470 AbstractCegarLoop]: Abstraction has 4049 states and 5836 transitions. [2021-11-12 23:14:51,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 2 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-12 23:14:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 5836 transitions. [2021-11-12 23:14:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-12 23:14:51,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:51,134 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:14:51,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:51,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:51,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:14:51,535 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 23:14:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1673429377, now seen corresponding path program 1 times [2021-11-12 23:14:51,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:51,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592056431] [2021-11-12 23:14:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:51,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:51,539 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:51,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:14:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:14:57,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 129 proven. 7 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-12 23:14:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-12 23:15:00,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:00,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592056431] [2021-11-12 23:15:00,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592056431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:15:00,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019009333] [2021-11-12 23:15:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:00,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:15:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:15:00,175 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:15:00,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:15:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:15:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 129 proven. 7 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-12 23:15:03,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-12 23:15:04,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1019009333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:15:04,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425327951] [2021-11-12 23:15:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:04,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:15:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:15:04,985 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:15:04,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 23:15:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:07,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 23:15:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-12 23:15:10,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-12 23:15:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425327951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:13,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:15:13,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [6, 6, 6, 6] total 23 [2021-11-12 23:15:13,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414493161] [2021-11-12 23:15:13,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:15:13,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:15:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:15:13,557 INFO L87 Difference]: Start difference. First operand 4049 states and 5836 transitions. Second operand has 15 states, 15 states have (on average 20.8) internal successors, (312), 13 states have internal predecessors, (312), 4 states have call successors, (132), 4 states have call predecessors, (132), 2 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2021-11-12 23:15:15,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:17,750 WARN L515 Checker$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 23:15:19,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:21,771 WARN L515 Checker$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 23:15:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:54,660 INFO L93 Difference]: Finished difference Result 9726 states and 14115 transitions. [2021-11-12 23:15:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:15:54,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.8) internal successors, (312), 13 states have internal predecessors, (312), 4 states have call successors, (132), 4 states have call predecessors, (132), 2 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) Word has length 515 [2021-11-12 23:15:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:54,678 INFO L225 Difference]: With dead ends: 9726 [2021-11-12 23:15:54,678 INFO L226 Difference]: Without dead ends: 5694 [2021-11-12 23:15:54,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3092 GetRequests, 3063 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:15:54,690 INFO L933 BasicCegarLoop]: 5787 mSDtfsCounter, 15023 mSDsluCounter, 34264 mSDsCounter, 0 mSdLazyCounter, 8770 mSolverCounterSat, 3821 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36519.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15043 SdHoareTripleChecker+Valid, 40051 SdHoareTripleChecker+Invalid, 12595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 173.00ms SdHoareTripleChecker+Time, 3821 IncrementalHoareTripleChecker+Valid, 8770 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39045.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:54,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15043 Valid, 40051 Invalid, 12595 Unknown, 0 Unchecked, 173.00ms Time], IncrementalHoareTripleChecker [3821 Valid, 8770 Invalid, 4 Unknown, 0 Unchecked, 39045.67ms Time] [2021-11-12 23:15:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-11-12 23:15:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4115. [2021-11-12 23:15:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 2931 states have (on average 1.3391334015694303) internal successors, (3925), 2991 states have internal predecessors, (3925), 1001 states have call successors, (1001), 183 states have call predecessors, (1001), 181 states have return successors, (1006), 982 states have call predecessors, (1006), 1001 states have call successors, (1006) [2021-11-12 23:15:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5932 transitions. [2021-11-12 23:15:55,110 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5932 transitions. Word has length 515 [2021-11-12 23:15:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:55,112 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5932 transitions. [2021-11-12 23:15:55,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.8) internal successors, (312), 13 states have internal predecessors, (312), 4 states have call successors, (132), 4 states have call predecessors, (132), 2 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2021-11-12 23:15:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5932 transitions. [2021-11-12 23:15:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-11-12 23:15:55,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:55,128 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:55,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-12 23:15:55,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:55,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:55,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:55,729 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:15:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2008424209, now seen corresponding path program 1 times [2021-11-12 23:15:55,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:55,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923833200] [2021-11-12 23:15:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:55,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:55,735 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:55,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:16:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 199 proven. 7 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-12 23:16:03,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-12 23:16:04,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:04,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923833200] [2021-11-12 23:16:04,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923833200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:04,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1138620289] [2021-11-12 23:16:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:04,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:04,740 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-12 23:16:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 199 proven. 7 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-12 23:16:08,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2021-11-12 23:16:10,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1138620289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:10,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317832255] [2021-11-12 23:16:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:10,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:16:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:16:10,055 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:16:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-12 23:16:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:16:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-12 23:16:13,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2021-11-12 23:16:14,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317832255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:14,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:16:14,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 5] imperfect sequences [6, 6, 6, 6] total 19 [2021-11-12 23:16:14,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637747852] [2021-11-12 23:16:14,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:14,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:16:14,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:16:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:16:14,715 INFO L87 Difference]: Start difference. First operand 4115 states and 5932 transitions. Second operand has 11 states, 11 states have (on average 25.272727272727273) internal successors, (278), 9 states have internal predecessors, (278), 3 states have call successors, (85), 4 states have call predecessors, (85), 2 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2021-11-12 23:16:16,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:20,041 INFO L93 Difference]: Finished difference Result 5694 states and 8285 transitions. [2021-11-12 23:16:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:16:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 25.272727272727273) internal successors, (278), 9 states have internal predecessors, (278), 3 states have call successors, (85), 4 states have call predecessors, (85), 2 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) Word has length 559 [2021-11-12 23:16:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:20,056 INFO L225 Difference]: With dead ends: 5694 [2021-11-12 23:16:20,056 INFO L226 Difference]: Without dead ends: 5692 [2021-11-12 23:16:20,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3360 GetRequests, 3335 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:16:20,059 INFO L933 BasicCegarLoop]: 6285 mSDtfsCounter, 4867 mSDsluCounter, 48951 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 871 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3623.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4887 SdHoareTripleChecker+Valid, 55236 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.49ms SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3918.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:20,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4887 Valid, 55236 Invalid, 986 Unknown, 0 Unchecked, 53.49ms Time], IncrementalHoareTripleChecker [871 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 3918.30ms Time] [2021-11-12 23:16:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5692 states. [2021-11-12 23:16:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5692 to 4115. [2021-11-12 23:16:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 2931 states have (on average 1.3387922210849539) internal successors, (3924), 2991 states have internal predecessors, (3924), 1001 states have call successors, (1001), 183 states have call predecessors, (1001), 181 states have return successors, (1006), 982 states have call predecessors, (1006), 1001 states have call successors, (1006) [2021-11-12 23:16:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5931 transitions. [2021-11-12 23:16:20,492 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5931 transitions. Word has length 559 [2021-11-12 23:16:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:20,493 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5931 transitions. [2021-11-12 23:16:20,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.272727272727273) internal successors, (278), 9 states have internal predecessors, (278), 3 states have call successors, (85), 4 states have call predecessors, (85), 2 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2021-11-12 23:16:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5931 transitions. [2021-11-12 23:16:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2021-11-12 23:16:20,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:20,520 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 12, 12, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:16:20,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:20,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:20,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:16:21,122 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 23:16:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash -251315336, now seen corresponding path program 1 times [2021-11-12 23:16:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:21,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248095685] [2021-11-12 23:16:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:21,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:21,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:21,132 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:21,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:16:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 4408 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 613 proven. 7 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-11-12 23:16:31,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2021-11-12 23:16:33,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:33,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248095685] [2021-11-12 23:16:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248095685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:33,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751055404] [2021-11-12 23:16:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:33,549 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:33,550 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-12 23:16:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 4408 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 950 proven. 0 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2021-11-12 23:16:38,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2302 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2299 trivial. 0 not checked. [2021-11-12 23:16:40,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751055404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:40,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:16:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18076396] [2021-11-12 23:16:40,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:40,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:16:40,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:16:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:16:40,204 INFO L87 Difference]: Start difference. First operand 4115 states and 5931 transitions. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 3 states have call successors, (177), 2 states have call predecessors, (177), 2 states have return successors, (169), 3 states have call predecessors, (169), 3 states have call successors, (169) [2021-11-12 23:16:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:40,603 INFO L93 Difference]: Finished difference Result 8221 states and 11945 transitions. [2021-11-12 23:16:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:16:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 3 states have call successors, (177), 2 states have call predecessors, (177), 2 states have return successors, (169), 3 states have call predecessors, (169), 3 states have call successors, (169) Word has length 959 [2021-11-12 23:16:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:40,625 INFO L225 Difference]: With dead ends: 8221 [2021-11-12 23:16:40,625 INFO L226 Difference]: Without dead ends: 4123 [2021-11-12 23:16:40,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3832 GetRequests, 3823 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:16:40,645 INFO L933 BasicCegarLoop]: 5369 mSDtfsCounter, 8 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10727 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:40,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 10727 Invalid, 9 Unknown, 0 Unchecked, 8.77ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 31.78ms Time] [2021-11-12 23:16:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-11-12 23:16:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 4120. [2021-11-12 23:16:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 2935 states have (on average 1.3386712095400342) internal successors, (3929), 2995 states have internal predecessors, (3929), 1002 states have call successors, (1002), 183 states have call predecessors, (1002), 181 states have return successors, (1007), 983 states have call predecessors, (1007), 1002 states have call successors, (1007) [2021-11-12 23:16:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5938 transitions. [2021-11-12 23:16:41,020 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5938 transitions. Word has length 959 [2021-11-12 23:16:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:41,021 INFO L470 AbstractCegarLoop]: Abstraction has 4120 states and 5938 transitions. [2021-11-12 23:16:41,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 3 states have call successors, (177), 2 states have call predecessors, (177), 2 states have return successors, (169), 3 states have call predecessors, (169), 3 states have call successors, (169) [2021-11-12 23:16:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5938 transitions. [2021-11-12 23:16:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2021-11-12 23:16:41,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:41,051 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:16:41,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:41,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:41,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:41,478 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 23:16:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1817938354, now seen corresponding path program 1 times [2021-11-12 23:16:41,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:41,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364903336] [2021-11-12 23:16:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:41,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:41,486 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:16:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 4422 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 613 proven. 7 refuted. 0 times theorem prover too weak. 1700 trivial. 0 not checked. [2021-11-12 23:16:51,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2303 trivial. 0 not checked. [2021-11-12 23:16:54,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364903336] [2021-11-12 23:16:54,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364903336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270845002] [2021-11-12 23:16:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:54,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:54,133 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:54,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-12 23:16:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:56,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 4422 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2021-11-12 23:16:58,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2317 trivial. 0 not checked. [2021-11-12 23:16:59,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270845002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:59,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:59,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-12 23:16:59,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434548531] [2021-11-12 23:16:59,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:59,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:16:59,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:16:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:16:59,901 INFO L87 Difference]: Start difference. First operand 4120 states and 5938 transitions. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 2 states have call successors, (143), 2 states have call predecessors, (143), 2 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2021-11-12 23:17:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:00,378 INFO L93 Difference]: Finished difference Result 8251 states and 11976 transitions. [2021-11-12 23:17:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:17:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 2 states have call successors, (143), 2 states have call predecessors, (143), 2 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 966 [2021-11-12 23:17:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:00,398 INFO L225 Difference]: With dead ends: 8251 [2021-11-12 23:17:00,398 INFO L226 Difference]: Without dead ends: 4148 [2021-11-12 23:17:00,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3860 GetRequests, 3851 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:17:00,413 INFO L933 BasicCegarLoop]: 5399 mSDtfsCounter, 17 mSDsluCounter, 5373 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10772 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:00,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 10772 Invalid, 5 Unknown, 0 Unchecked, 8.57ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 13.98ms Time] [2021-11-12 23:17:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-11-12 23:17:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4122. [2021-11-12 23:17:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 2937 states have (on average 1.3384405856315968) internal successors, (3931), 2997 states have internal predecessors, (3931), 1002 states have call successors, (1002), 183 states have call predecessors, (1002), 181 states have return successors, (1007), 983 states have call predecessors, (1007), 1002 states have call successors, (1007) [2021-11-12 23:17:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 5940 transitions. [2021-11-12 23:17:00,788 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 5940 transitions. Word has length 966 [2021-11-12 23:17:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:00,789 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 5940 transitions. [2021-11-12 23:17:00,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 2 states have call successors, (143), 2 states have call predecessors, (143), 2 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2021-11-12 23:17:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 5940 transitions. [2021-11-12 23:17:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2021-11-12 23:17:00,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:00,810 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 12, 12, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:00,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:01,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:01,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:01,214 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 23:17:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 593266471, now seen corresponding path program 1 times [2021-11-12 23:17:01,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:01,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860662052] [2021-11-12 23:17:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:01,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:01,220 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:01,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 23:17:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 4339 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:17:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 702 proven. 7 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-12 23:17:11,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2021-11-12 23:17:13,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:13,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860662052] [2021-11-12 23:17:13,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860662052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:13,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804721552] [2021-11-12 23:17:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:13,378 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:13,379 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-12 23:17:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 4339 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:17:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 1000 proven. 0 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2021-11-12 23:17:18,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2021-11-12 23:17:21,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [804721552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:17:21,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:17:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 6, 9] total 20 [2021-11-12 23:17:21,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418436309] [2021-11-12 23:17:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:21,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:17:21,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:17:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:17:21,840 INFO L87 Difference]: Start difference. First operand 4122 states and 5940 transitions. Second operand has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 6 states have internal predecessors, (440), 3 states have call successors, (137), 2 states have call predecessors, (137), 3 states have return successors, (133), 4 states have call predecessors, (133), 3 states have call successors, (133) [2021-11-12 23:17:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:23,144 INFO L93 Difference]: Finished difference Result 8247 states and 11992 transitions. [2021-11-12 23:17:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:17:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 6 states have internal predecessors, (440), 3 states have call successors, (137), 2 states have call predecessors, (137), 3 states have return successors, (133), 4 states have call predecessors, (133), 3 states have call successors, (133) Word has length 940 [2021-11-12 23:17:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:23,168 INFO L225 Difference]: With dead ends: 8247 [2021-11-12 23:17:23,168 INFO L226 Difference]: Without dead ends: 4142 [2021-11-12 23:17:23,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3760 GetRequests, 3737 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:17:23,183 INFO L933 BasicCegarLoop]: 5358 mSDtfsCounter, 23 mSDsluCounter, 32124 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 380.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37482 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.98ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 414.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:23,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 37482 Invalid, 137 Unknown, 0 Unchecked, 31.98ms Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 414.00ms Time] [2021-11-12 23:17:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-11-12 23:17:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4128. [2021-11-12 23:17:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 2941 states have (on average 1.337980278816729) internal successors, (3935), 2999 states have internal predecessors, (3935), 1004 states have call successors, (1004), 183 states have call predecessors, (1004), 181 states have return successors, (1009), 985 states have call predecessors, (1009), 1004 states have call successors, (1009) [2021-11-12 23:17:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 5948 transitions. [2021-11-12 23:17:23,561 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 5948 transitions. Word has length 940 [2021-11-12 23:17:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 5948 transitions. [2021-11-12 23:17:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 6 states have internal predecessors, (440), 3 states have call successors, (137), 2 states have call predecessors, (137), 3 states have return successors, (133), 4 states have call predecessors, (133), 3 states have call successors, (133) [2021-11-12 23:17:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 5948 transitions. [2021-11-12 23:17:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2021-11-12 23:17:23,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:23,583 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 12, 12, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:23,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:23,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:23,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:23,985 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 23:17:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -99874010, now seen corresponding path program 1 times [2021-11-12 23:17:23,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:23,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716994159] [2021-11-12 23:17:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:23,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:23,991 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:23,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-12 23:17:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 4356 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:17:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 702 proven. 7 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-12 23:17:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2021-11-12 23:17:36,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:36,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716994159] [2021-11-12 23:17:36,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716994159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:36,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990980004] [2021-11-12 23:17:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:36,245 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:36,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:36,254 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:36,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-12 23:17:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 4356 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 1005 proven. 0 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2021-11-12 23:17:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-11-12 23:17:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990980004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:43,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:17:43,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6] total 13 [2021-11-12 23:17:43,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690801241] [2021-11-12 23:17:43,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:43,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:17:43,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:17:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:17:43,371 INFO L87 Difference]: Start difference. First operand 4128 states and 5948 transitions. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 4 states have call successors, (193), 2 states have call predecessors, (193), 3 states have return successors, (189), 4 states have call predecessors, (189), 4 states have call successors, (189) [2021-11-12 23:17:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:43,983 INFO L93 Difference]: Finished difference Result 8260 states and 12009 transitions. [2021-11-12 23:17:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:17:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 4 states have call successors, (193), 2 states have call predecessors, (193), 3 states have return successors, (189), 4 states have call predecessors, (189), 4 states have call successors, (189) Word has length 945 [2021-11-12 23:17:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:44,000 INFO L225 Difference]: With dead ends: 8260 [2021-11-12 23:17:44,001 INFO L226 Difference]: Without dead ends: 4149 [2021-11-12 23:17:44,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3777 GetRequests, 3765 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:17:44,012 INFO L933 BasicCegarLoop]: 5369 mSDtfsCounter, 118 mSDsluCounter, 5362 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 10731 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.73ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:44,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 10731 Invalid, 19 Unknown, 0 Unchecked, 9.73ms Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 51.74ms Time] [2021-11-12 23:17:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-11-12 23:17:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 4149. [2021-11-12 23:17:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4149 states, 2960 states have (on average 1.3381756756756757) internal successors, (3961), 3018 states have internal predecessors, (3961), 1005 states have call successors, (1005), 184 states have call predecessors, (1005), 182 states have return successors, (1010), 986 states have call predecessors, (1010), 1005 states have call successors, (1010) [2021-11-12 23:17:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4149 states to 4149 states and 5976 transitions. [2021-11-12 23:17:44,381 INFO L78 Accepts]: Start accepts. Automaton has 4149 states and 5976 transitions. Word has length 945 [2021-11-12 23:17:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:44,382 INFO L470 AbstractCegarLoop]: Abstraction has 4149 states and 5976 transitions. [2021-11-12 23:17:44,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 4 states have call successors, (193), 2 states have call predecessors, (193), 3 states have return successors, (189), 4 states have call predecessors, (189), 4 states have call successors, (189) [2021-11-12 23:17:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4149 states and 5976 transitions. [2021-11-12 23:17:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-11-12 23:17:44,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:44,403 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:44,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-11-12 23:17:44,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:44,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:44,806 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 23:17:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -576341796, now seen corresponding path program 1 times [2021-11-12 23:17:44,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:44,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750410754] [2021-11-12 23:17:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:44,812 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:44,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-12 23:17:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 4456 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:17:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 613 proven. 7 refuted. 0 times theorem prover too weak. 1700 trivial. 0 not checked. [2021-11-12 23:17:55,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2303 trivial. 0 not checked. [2021-11-12 23:17:57,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:57,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750410754] [2021-11-12 23:17:57,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750410754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:17:57,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114405154] [2021-11-12 23:17:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:57,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:17:57,330 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:17:57,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-12 23:17:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 4456 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:18:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1059 proven. 0 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2021-11-12 23:18:02,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2315 trivial. 0 not checked. [2021-11-12 23:18:04,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114405154] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:04,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:04,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 16 [2021-11-12 23:18:04,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806709538] [2021-11-12 23:18:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:18:04,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:18:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:18:04,833 INFO L87 Difference]: Start difference. First operand 4149 states and 5976 transitions. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 4 states have internal predecessors, (466), 3 states have call successors, (141), 4 states have call predecessors, (141), 2 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) [2021-11-12 23:18:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:05,599 INFO L93 Difference]: Finished difference Result 8316 states and 12071 transitions. [2021-11-12 23:18:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:18:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 4 states have internal predecessors, (466), 3 states have call successors, (141), 4 states have call predecessors, (141), 2 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) Word has length 977 [2021-11-12 23:18:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:05,616 INFO L225 Difference]: With dead ends: 8316 [2021-11-12 23:18:05,616 INFO L226 Difference]: Without dead ends: 4184 [2021-11-12 23:18:05,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3905 GetRequests, 3890 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:18:05,629 INFO L933 BasicCegarLoop]: 5364 mSDtfsCounter, 41 mSDsluCounter, 16067 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 21431 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.48ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:05,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 21431 Invalid, 102 Unknown, 0 Unchecked, 18.48ms Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 286.75ms Time] [2021-11-12 23:18:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-11-12 23:18:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 4180. [2021-11-12 23:18:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 2985 states have (on average 1.337353433835846) internal successors, (3992), 3043 states have internal predecessors, (3992), 1009 states have call successors, (1009), 186 states have call predecessors, (1009), 184 states have return successors, (1018), 990 states have call predecessors, (1018), 1009 states have call successors, (1018) [2021-11-12 23:18:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6019 transitions. [2021-11-12 23:18:06,009 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6019 transitions. Word has length 977 [2021-11-12 23:18:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:06,010 INFO L470 AbstractCegarLoop]: Abstraction has 4180 states and 6019 transitions. [2021-11-12 23:18:06,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 4 states have internal predecessors, (466), 3 states have call successors, (141), 4 states have call predecessors, (141), 2 states have return successors, (133), 3 states have call predecessors, (133), 3 states have call successors, (133) [2021-11-12 23:18:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6019 transitions. [2021-11-12 23:18:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2021-11-12 23:18:06,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:06,030 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 19, 12, 12, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:06,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:06,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:06,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:06,431 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 23:18:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1796107631, now seen corresponding path program 1 times [2021-11-12 23:18:06,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:06,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109837695] [2021-11-12 23:18:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:06,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:06,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:06,437 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:06,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-12 23:18:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:13,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 4259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:18:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2046 backedges. 635 proven. 7 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2021-11-12 23:18:16,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2046 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2036 trivial. 0 not checked. [2021-11-12 23:18:18,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:18,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109837695] [2021-11-12 23:18:18,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109837695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:18,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264213701] [2021-11-12 23:18:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:18,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:18,662 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:18,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-12 23:18:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:21,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 4259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:18:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2046 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2021-11-12 23:18:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2046 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2041 trivial. 0 not checked. [2021-11-12 23:18:24,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264213701] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:18:24,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:18:24,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 5] total 13 [2021-11-12 23:18:24,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816592954] [2021-11-12 23:18:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:24,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:18:24,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:18:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:18:24,562 INFO L87 Difference]: Start difference. First operand 4180 states and 6019 transitions. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 4 states have internal predecessors, (419), 2 states have call successors, (133), 2 states have call predecessors, (133), 3 states have return successors, (128), 3 states have call predecessors, (128), 2 states have call successors, (128) [2021-11-12 23:18:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:25,091 INFO L93 Difference]: Finished difference Result 8345 states and 12050 transitions. [2021-11-12 23:18:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:18:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 4 states have internal predecessors, (419), 2 states have call successors, (133), 2 states have call predecessors, (133), 3 states have return successors, (128), 3 states have call predecessors, (128), 2 states have call successors, (128) Word has length 926 [2021-11-12 23:18:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:25,104 INFO L225 Difference]: With dead ends: 8345 [2021-11-12 23:18:25,104 INFO L226 Difference]: Without dead ends: 4182 [2021-11-12 23:18:25,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3700 GetRequests, 3689 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:18:25,116 INFO L933 BasicCegarLoop]: 5370 mSDtfsCounter, 163 mSDsluCounter, 15911 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 21281 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:25,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 21281 Invalid, 8 Unknown, 0 Unchecked, 15.36ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 21.77ms Time] [2021-11-12 23:18:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2021-11-12 23:18:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4180. [2021-11-12 23:18:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 2985 states have (on average 1.3370184254606365) internal successors, (3991), 3043 states have internal predecessors, (3991), 1009 states have call successors, (1009), 186 states have call predecessors, (1009), 184 states have return successors, (1018), 990 states have call predecessors, (1018), 1009 states have call successors, (1018) [2021-11-12 23:18:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6018 transitions. [2021-11-12 23:18:25,487 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6018 transitions. Word has length 926 [2021-11-12 23:18:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 4180 states and 6018 transitions. [2021-11-12 23:18:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 4 states have internal predecessors, (419), 2 states have call successors, (133), 2 states have call predecessors, (133), 3 states have return successors, (128), 3 states have call predecessors, (128), 2 states have call successors, (128) [2021-11-12 23:18:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6018 transitions. [2021-11-12 23:18:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2021-11-12 23:18:25,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:25,510 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 21, 21, 21, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:18:25,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:25,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:25,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:25,912 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 23:18:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:25,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1306099663, now seen corresponding path program 1 times [2021-11-12 23:18:25,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:25,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003402156] [2021-11-12 23:18:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:25,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:25,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:25,918 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-12 23:18:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 4463 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:18:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 796 proven. 7 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2021-11-12 23:18:36,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2021-11-12 23:18:38,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:38,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003402156] [2021-11-12 23:18:38,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003402156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:38,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136652285] [2021-11-12 23:18:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:38,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:38,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:38,638 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:38,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-12 23:18:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 4463 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:18:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 796 proven. 7 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2021-11-12 23:18:44,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2021-11-12 23:18:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136652285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:46,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079898087] [2021-11-12 23:18:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:46,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:46,861 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:46,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce5a5e-989c-41d8-82ff-189843c57c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-12 23:18:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 4463 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:18:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:50,523 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-12 23:18:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 19 [2021-11-12 23:18:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 1105 proven. 0 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2021-11-12 23:18:52,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2021-11-12 23:18:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079898087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:54,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:18:54,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6, 6, 6] total 16 [2021-11-12 23:18:54,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808967089] [2021-11-12 23:18:54,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:54,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:18:54,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:18:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:18:54,720 INFO L87 Difference]: Start difference. First operand 4180 states and 6018 transitions. Second operand has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 2 states have call successors, (204), 2 states have call predecessors, (204), 2 states have return successors, (198), 2 states have call predecessors, (198), 2 states have call successors, (198) [2021-11-12 23:18:56,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:58,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:00,686 WARN L515 Checker$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 23:19:02,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:03,693 WARN L515 Checker$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 23:19:08,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:10,759 WARN L515 Checker$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 23:19:12,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:15,571 WARN L515 Checker$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 23:19:17,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:19,787 WARN L515 Checker$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 23:19:21,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:24,221 WARN L515 Checker$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 23:19:26,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:28,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:31,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:33,033 WARN L515 Checker$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 23:19:35,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:37,087 WARN L515 Checker$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 23:19:43,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:45,880 WARN L515 Checker$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 23:19:51,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:53,051 WARN L515 Checker$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 23:19:55,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:56,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:57,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:00,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:13,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:18,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []